Two new Erythrophylloporus species (Boletaceae) from Thailand, with two new combinations of American species.

Erythrophylloporus is a lamellate genus in the family Boletaceae that has been recently described from China based on E.cinnabarinus, the only known species. Typical characters of Erythrophylloporus are reddish-orange to yellowish-red basidiomata, including lamellae, bright yellow basal mycelium and smooth, broadly ellipsoid, ellipsoid to nearly ovoid basidiospores. During our survey on diversity of Boletaceae in Thailand, several yellowish-orange to reddish- or brownish-orange lamellate boletes were collected. Based on both morphological evidence and molecular analyses of a four-gene dataset (atp6, tef1, rpb2 and cox3), they were recognised as belonging in Erythrophylloporus and different from the already known species. Two new species, E.paucicarpus and E.suthepensis are therefore introduced from Thailand with detailed descriptions and illustrations. Moreover, two previously described Phylloporus species, P.aurantiacus and P.fagicola, were also revised and recombined in Erythrophylloporus. A key to all known Erythrophylloporus species is provided.

Introduction

Most fungi in the family are pileate-stipitate with poroid hymenophore, but some have a lamellate hymenophore. Lamellate are currently classified in four genera, Quél, which contains about 84 species worldwide, Singer from South America and Mexico, the two recently described genera Angelini et al., from the New World and Ming Zhang & T.H. Li from Asia, each of which circumscribes only one species (http://www.indexfungorum.org, Farid et al. 2018; Zhang and Li 2018).

The genus was recently described from China, with Ming Zhang & T.H. Li as the type species. According to Zhang & Li (2018), the typical characters of the genus are orange to reddish-orange basidiomes, reddish-orange to yellowish-red lamellae turning greyish-green when bruised, bright yellow to orange yellow context staining blackish-blue to dark blue when exposed, bright yellow basal mycelium, smooth and broadly ellipsoid to nearly ovoid basidiospores and yellowish-brown pigmented cystidia. During our survey on the diversity of in Thailand, several collections of lamellate boletes were discovered. Some collections were recognised to belong to by possessing yellowish-orange to deep orange to reddish-orange basidiomata with bright yellow basal mycelium and smooth basidiospores. We also found that two described species, Halling & G.M. Mueller from Costa Rica and Montoya & Bandala from Mexico (Halling et al. 1999, Montoya and Bandala 2011), share similar morphological characters with the genus , but until now, have not been included in a molecular phylogeny. In this study, a combination of phylogenetic and morphological evidence indicated that our Thai collections were new species, that, together with the two aforementioned American species, belong in . Therefore, we introduce two new species with detailed descriptions and illustrations and propose two new combinations. As some of the species we studied have some characters that do not fit with the protologue of the genus, we emend its description.

Materials and methods

Specimen collecting

Specimens were obtained and photographed from community forests and Doi Suthep-Pui National Park, Chiang Mai Province, northern Thailand during the rainy season in 2015 to 2016. The specimens were wrapped in aluminium foil and taken to the laboratory. After description of macroscopic characters, all specimens were dried in an electric drier at 45–50 °C. Examined specimens were deposited in the herbaria CMUB, MFLU, BKF or BR (Index Herbariorum; Thiers, continuously updated).

Morphological studies

Macroscopic descriptions were made based on detailed field notes and photos of fresh basidiomata. Colour codes follow Kornerup and Wanscher (1978). Macrochemical reactions (colour reactions) of fresh basidiomata were determined using 10% potassium hydroxide (KOH) and 28–30% ammonium hydroxide (NH4OH) in water. Microscopic structures were observed from dried specimens mounted in 5% KOH, NH4OH, Melzer’s reagent or 1% ammoniacal Congo red. A minimum of 50 basidiospores, 20 basidia and 20 cystidia were randomly measured at 1000× with a calibrated ocular micrometer using an Olympus CX51 microscope. The notation ‘[m/n/p]’ represents the number of basidiospores m measured from n basidiomata of p collections. Dimensions of microscopic structures are presented in the following format: (a–)b–c–d (–e), in which c represents the average, b the 5th percentile, d the 95th percentile and a and e the minimum and maximum values, respectively. Q, the length/width ratio, is presented in the same format. A section of the pileus surface was radially and perpendicularly cut at a point halfway between the centre and margin of the pileus. Sections of stipitipellis were taken from halfway up the stipe and longitudinally cut, perpendicularly to the surface. All microscopic features were drawn by free hand using an Olympus Camera Lucida model U−DA, fitted to the microscope cited above. For scanning electron microscopy (SEM), a spore print was mounted on to a SEM stub with double-sided tape. The sample was coated with gold, examined and photographed with a JEOL JSM–5910 LV SEM (JEOL, Japan).

DNA isolation, PCR amplification and DNA sequencing

Genomic DNA was extracted from fresh tissue preserved in CTAB or about 10–15 mg of dried specimens using a CTAB isolation procedure adapted from Doyle and Doyle (1990). Portions of the genes atp6, tef1, rpb2 and cox3 were amplified by the polymerase chain reaction (PCR) technique. The tailed primers ATP6-1M40F and ATP6-2M (Raspé et al. 2016) and the primer pairs EF1-983F/EF1-2218R (Rehner and Buckley 2005) and bRPB2-6F/bRPB2-7.1R (Matheny 2005) were used to amplify atp6, tef1 and rpb2, respectively. PCR conditions were the same as in Raspé et al. (2016). Part of the mitochondrial gene cox3 was amplified with the primers COX3M1-F and COX3M1-R (Vadthanarat et al. 2019), using KAPA2G™ Robust HotStart polymerase (Kapa Biosystems, Wilmington, MA, USA) and the following PCR programme: 2 min 30 s at 95 °C; 35 cycles of 25 s at 95 °C, 30 s at 48 °C, 30 s at 72 °C; 3 min at 72 °C. PCR products were purified by adding 1 U of Exonuclease I and 0.5 U FastAP Alkaline Phosphatase (Thermo Scientific, St. Leon-Rot, Germany) and incubated at 37 °C for 1 h, followed by inactivation at 80 °C for 15 min. Sequencing was performed by Macrogen Inc. (Korea and The Netherlands) with PCR primers, except for atp6, for which universal primers M13F-pUC(-40) and M13F(-20) were used; for tef1, additional sequencing was performed with two internal primers, EF1-1577F and EF1-1567R (Rehner and Buckley 2005).

Alignment and phylogeny inference

The sequences were assembled in GENEIOUS Pro v. 6.0.6 (Biomatters) and introns were removed prior to alignment, based on the amino acid sequence of previously published sequences. All sequences, including sequences from GenBank, were aligned using MAFFT version 7 (Katoh and Standley 2013) on the server accessed at http://mafft.cbrE.jp/alignment/server/.

Maximum Likelihood (ML) phylogenetic tree inference was performed using RAxML-HPC2 version 8.2.10 (Stamatakis 2006) on the CIPRES web portal (Miller et al. 2009). The phylogenetic tree was inferred from a four-partitions combined dataset, using the GTRCAT model with 25 categories. Two and nine species from subfamily were used as the outgroup. Statistical support of clades was obtained with 1,000 rapid bootstrap replicates.

For Bayesian Inference (BI), the best-fit model of substitution amongst those implementable in MrBayes was estimated separately for each gene using jModeltest (Darriba et al. 2012) on the CIPRES portal, based on the Bayesian Information Criterion (BIC). The selected models were GTR+I+G for atp6 and cox3, SYM+I+G for tef1 and K80+I+G for rpb2. Partitioned Bayesian analysis was performed with MrBayes 3.2 (Ronquist et al. 2012) on the CIPRES portal. Two runs of five chains were run for 15,000,000 generations and sampled every 1,000 generations. The chain temperature was decreased to 0.02 to improve convergence. At the end of the run, the average deviation of split frequencies was 0.007058 and the Potential Scale Reduction Factor (PSRF) values of all parameters were close to 1. The burn-in phase (25%) was estimated by checking the stationarity in the plot generated by the sump command.

Results

Phylogenetic analysis

Twenty-five sequences were newly generated and deposited in GenBank (Table 1). The sequences from three specimens, OR0689, OR1135 () and OR0615B (), were not included in our phylogenic analyses because they were identical to the sequences of the type specimens of and . The alignment contained 906 sequences (179 for atp6, 313 for tef1, 279 for rpb2, 135 for cox3) from 315 voucher specimens and was 2946 characters long (TreeBase number 24078). ML and BI trees showed similar topologies without any supported conflict (Bootstrap Support values, BS ≥ 70% and posterior probabilities, PP ≥ 0.90; Fig. 1). The four-gene phylogram indicated that the included taxa formed seven clades, representing the , , , , , and the group. (typus generis) grouped with the two new species, and , in a highly supported clade (BS = 100% and PP = 1). The two New World species ( voucher REH7271 and voucher Garay215) also clustered in the clade indicating that they are close relatives. formed a clade sister to the genus T.W. Henkel & M.E. Sm. with high Bootstrap support (96%) but low posterior probability support (0.86) within the group. Some undescribed species formed two different generic clades in the group. p.p. spp. clade 1 contains two specimens, HKAS63598 and HKAS9660, named “ sp.” in Wu et al. (2016), as well as two of our specimens, OR0832 and OR1002. p.p. sp. clade 2 contains a single African specimen, JD0693, sister to and morphologically different from .

Table 1.

List of collections used in this study, with origin and GenBank accession numbers. Newly generated sequences are presented in bold.

Species	Voucher	Origin	atp6	tef1	rpb2	cox3	References
Afroboletus aff. multijugus	JD671	Burundi	MH614651	MH614700	MH614747	MH614794	Vadthanarat et al. 2019
Afroboletus costatisporus	ADK4644	Togo	KT823958	KT824024	KT823991	MH614795*	Raspé et al. 2016; *Vadthanarat et al. 2019
Afroboletus luteolus	ADK4844	Togo	MH614652	MH614701	MH614748	MH614796	Vadthanarat et al. 2019
Aureoboletus catenarius	HKAS54467	China	–	KT990711	KT990349	–	Wu et al. 2016
Aureoboletus duplicatoporus	HKAS50498	China	–	KF112230	KF112754	–	Wu et al. 2014
Aureoboletus gentilis	ADK4865	Belgium	KT823961	KT824027	KT823994	MH614797*	Raspé et al. 2016; *Vadthanarat et al. 2019
Aureoboletus mirabilis	HKAS57776	China	–	KF112229	KF112743	–	Wu et al. 2014
Aureoboletus moravicus	VDKO1120	Belgium	MG212528	MG212573	MG212615	MH614798*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Aureoboletus nephrosporus	HKAS67931	China	–	KT990720	KT990357	–	Wu et al. 2016
Aureoboletus projectellus	AFTOL-ID-713	USA	DQ534604*	AY879116	AY787218	–	*Binder & Hibbett 2006; Binder, Matheny & Hibbett, Unpublished
Aureoboletus shichianus	HKAS76852	China	–	KF112237	KF112756	–	Wu et al. 2014
Aureoboletus sp.	HKAS56317	China	–	KF112239	KF112753	–	Wu et al. 2014
Aureoboletus sp.	OR0245	China	MH614653	MH614702	MH614749	MH614799	Vadthanarat et al. 2019
Aureoboletus sp.	OR0369	Thailand	MH614654	MH614703	MH614750	MH614800	Vadthanarat et al. 2019
Aureoboletus thibetanus	HKAS76655	China	–	KF112236	KF112752	–	Wu et al. 2014
Aureoboletus thibetanus	AFTOL-ID-450	China	DQ534600*	DQ029199	DQ366279	–	*Binder and Hibbett 2006; Unpublished
Aureoboletus tomentosus	HKAS80485	China	–	KT990715	KT990353	–	Wu et al. 2016
Aureoboletus viscosus	OR0361	Thailand	MH614655	MH614704	MH614751	MH614801	Vadthanarat et al. 2019
Aureoboletus zangii	HKAS74766	China	–	KT990726	KT990363	–	Wu et al. 2016
Austroboletus cf. dictyotus	OR0045	Thailand	KT823966	KT824032	KT823999	MH614802*	Raspé et al. 2016; *Vadthanarat et al. 2019
Austroboletus cf. subvirens	OR0573	Thailand	MH614656	MH614705	MH614752	MH614803	*Vadthanarat et al. 2019
Austroboletus eburneus	REH9487	Australia	–	JX889708	–	–	Halling et al. 2012b
Austroboletus olivaceoglutinosus	HKAS57756	China	–	KF112212	KF112764	–	Wu et al. 2014
Austroboletus sp.	HKAS59624	China	–	KF112217	KF112765	–	Wu et al. 2014
Austroboletus sp.	OR0891	Thailand	MH614657	MH614706	MH614753	MH614804	Vadthanarat et al. 2019
Baorangia pseudocalopus	HKAS63607	China	–	KF112167	KF112677	–	Wu et al. 2014
Baorangia pseudocalopus	HKAS75739	China	–	KJ184570	KM605179	–	Wu et al. 2015
Baorangia pseudocalopus	HKAS75081	China	–	KF112168	KF112678	–	Wu et al. 2014
Baorangia rufomaculata	BOTH4144	USA	MG897415	MG897425	MG897435	MH614805*	Phookamsak et al. 2019; *Vadthanarat et al. 2019
Baorangia major	OR0209	Thailand	MG897421	MG897431	MG897441	MK372295*	Phookamsak et al. 2019; *Vadthanarat et al. 2019
Boletellus aff. ananas	NY815459	Costa Rica	–	KF112308	KF112760	–	Wu et al. 2014
Boletellus aff. emodensis	OR0061	Thailand	KT823970	KT824036	KT824003	MH614806*	Raspé et al. 2016; *Vadthanarat et al. 2019
Boletellus ananas	K(M)123769	Belize	MH614658	MH614707	MH614754	MH614807	Vadthanarat et al. 2019
Boletellus sp.	OR0621	Thailand	MG212529	MG212574	MG212616	MH614808*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Boletellus sp.	HKAS58713	China	–	KF112307	KF112759	–	Wu et al. 2014
Boletellus sp.	HKAS59536	China	–	KF112306	KF112758	–	Wu et al. 2014
Boletus aereus	VDKO1055	Belgium	MG212530	MG212575	MG212617	MH614809*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Boletus albobrunnescens	OR0131	Thailand	KT823973	KT824039	KT824006	MH614810*	Raspé et al. 2016; *Vadthanarat et al. 2019
Boletus botryoides	HKAS53403	China	–	KT990738	KT990375	–	Wu et al. 2016
Boletus edulis	HMJAU4637	Russia	–	KF112202	KF112704	–	Wu et al. 2014
Boletus edulis	VDKO0869	Belgium	MG212531	MG212576	MG212618	MH614811*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Boletus p.p. sp	JD0693	Burundi	MH645583	MH645591	MH645599	–	Vadthanarat et al. 2019
Boletus p.p. sp.	OR0832	Thailand	MH645584	MH645592	MH645600	MH645605	Vadthanarat et al. 2019
Boletus p.p. sp.	OR1002	Thailand	MH645585	MH645593	MH645601	MH645606	Vadthanarat et al. 2019
Boletus pallidus	BOTH4356	USA	MH614659	MH614708	–	MH614812	Vadthanarat et al. 2019
Boletus pallidus	TDB-1231-Bruns	–	AF002142	–	–	AF002154	Kretzer and Bruns 1999
Boletus reticuloceps	HKAS57671	China	–	KF112201	KF112703	–	Wu et al. 2014
Boletus s.s. sp.	OR0446	China	MG212532	MG212577	MG212619	MH614813*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Boletus sp.	HKAS59660	China	–	KF112153	KF112664	–	Wu et al. 2014
Boletus sp.	HKAS63598	China	–	KF112152	KF112663	–	Wu et al. 2014
Boletus violaceofuscus	HKAS62900	China	–	KF112219	KF112762	–	Wu et al. 2014
Borofutus dhakanus	HKAS73789	Bangladesh	–	JQ928576	JQ928597	–	Hosen et al. 2013
Borofutus dhakanus	OR0345	Thailand	MH614660	MH614709	MH614755	MH614814	Vadthanarat et al. 2019
Buchwaldoboletus lignicola	HKAS76674	China	–	KF112277	KF112819	–	Wu et al. 2014
Buchwaldoboletus lignicola	VDKO1140	Belgium	MH614661	MH614710	MH614756	MH614815	Vadthanarat et al. 2019
Butyriboletus appendiculatus	VDKO0193b	Belgium	MG212537	MG212582	MG212624	MH614816*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Butyriboletus cf. roseoflavus	OR0230	China	KT823974	KT824040	KT824007	MH614819*	Raspé et al. 2016; *Vadthanarat et al. 2019
Butyriboletus frostii	NY815462	USA	–	KF112164	KF112675	–	Wu et al. 2014
Butyriboletus pseudoregius	VDKO0925	Belgium	MG212538	MG212583	MG212625	MH614817*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Butyriboletus pseudospeciosus	HKAS63513	China	–	KT990743	KT990380	–	Wu et al. 2016
Butyriboletus roseoflavus	HKAS54099	China	–	KF739779	KF739703	–	Wu et al. 2014
Butyriboletus roseopurpureus	BOTH4497	USA	MG897418	MG897428	MG897438	MH614818*	Phookamsak et al. 2019; *Vadthanarat et al. 2019
Butyriboletus sp.	HKAS52525	China	–	KF112163	KF112671	–	Wu et al. 2014
Butyriboletus sp.	HKAS59814	China	–	KF112199	KF112699	–	Wu et al. 2014
Butyriboletus sp.	HKAS57774	China	–	KF112155	KF112670	–	Wu et al. 2014
Butyriboletus subsplendidus	HKAS50444	China	–	KT990742	KT990379	–	Wu et al. 2016
Butyriboletus yicibus	HKAS55413	China	–	KF112157	KF112674	–	Wu et al. 2014
Caloboletus calopus	ADK4087	Belgium	MG212539	KJ184566	KP055030	MH614820	Vadthanarat et al. 2018; Zhao et al. 2014a; Zhao et al. 2014b; Vadthanarat et al. 2019
Caloboletus inedulis	BOTH3963	USA	MG897414	MG897424	MG897434	MH614821*	Phookamsak et al. 2019; *Vadthanarat et al. 2019
Caloboletus panniformis	HKAS55444	China	–	KF112165	KF112666	–	Wu et al. 2014
Caloboletus radicans	VDKO1187	Belgium	MG212540	MG212584	MG212626	MH614822*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Caloboletus sp.	HKAS53353	China	–	KF112188	KF112668	–	Wu et al. 2014
Caloboletus sp.	OR0068	Thailand	MH614662	MH614711	MH614757	MH614823	Vadthanarat et al. 2019
Caloboletus yunnanensis	HKAS69214	China	–	KJ184568	KT990396	–	Zhao et al. 2014a; Wu et al. 2016
Chalciporus aff. piperatus	OR0586	Thailand	KT823976	KT824042	KT824009	MH614824*	Raspé et al. 2016; *Vadthanarat et al. 2019
Chalciporus aff. rubinus	OR0139	China	MH614663	MH614712	MH614758	–	Vadthanarat et al. 2019
Chalciporus africanus	JD517	Cameroon	KT823963	KT824029	KT823996	MH614825*	Raspé et al. 2016; *Vadthanarat et al. 2019
Chalciporus piperatus	VDKO1063	Belgium	MH614664	MH614713	MH614759	MH614826	Vadthanarat et al. 2019
Chalciporus rubinus	AF2835	Belgium	KT823962	KT824028	KT823995	–	Raspé et al. 2016
Chalciporus sp.	HKAS53400	China	–	KF112279	KF112821	–	Wu et al. 2014
Chalciporus sp.	HKAS74779	China	–	KF112278	KF112820	–	Wu et al. 2014
Chalciporus sp.	OR0363	Thailand	MH645586	MH645594	MH645602	MH645607	Vadthanarat et al. 2019
Chalciporus sp.	OR0373	Thailand	MH645587	MH645595	MH645603	MH645608	Vadthanarat et al. 2019
Chiua sp.	OR0141	China	MH614665	MH614714	MH614760	MH614827	Vadthanarat et al. 2019
Chiua virens	HKAS76678	China	–	KF112272	KF112793	–	Wu et al. 2014
Chiua virens	OR0266	China	MG212541	MG212585	MG212627	MH614828*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Chiua viridula	HKAS74928	China	–	KF112273	KF112794	–	Wu et al. 2014
Crocinoboletus cf. laetissimus	OR0576	Thailand	KT823975	KT824041	KT824008	MH614833*	Raspé et al. 2016; *Vadthanarat et al. 2019
Crocinoboletus rufoaureus	HKAS53424	China	–	KF112206	KF112710	–	Wu et al. 2014
Cyanoboletus brunneoruber	OR0233	China	MG212542	MG212586	MG212628	MH614834*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Cyanoboletus instabilis	HKAS59554	China	–	KF112186	KF112698	–	Wu et al. 2014
Cyanoboletus pulverulentus	RW109	Belgium	KT823980	KT824046	KT824013	MH614835*	Raspé et al. 2016; *Vadthanarat et al. 2019
Cyanoboletus sinopulverulentus	HKAS59609	China	–	KF112193	KF112700	–	Wu et al. 2014
Cyanoboletus sp.	OR0257	China	MG212543	MG212587	MG212629	MH614836*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Cyanoboletus sp.	HKAS76850	China	–	KF112187	KF112697	–	Wu et al. 2014
Cyanoboletus sp.	OR0322	Thailand	MH614673	MH614722	MH614768	MH614837	Vadthanarat et al. 2019
Cyanoboletus sp.	OR0491	China	MH614674	MH614723	MH614769	MH614838	Vadthanarat et al. 2019
Cyanoboletus sp.	OR0961	Thailand	MH614675	MH614724	MH614770	MH614839	Vadthanarat et al. 2019
Erythrophylloporus aurantiacus	REH7271	Costa Rica	MH614666	MH614715	MH614761	MH614829	This study
Erythrophylloporus cinnabarinus	GDGM70536	China	–	MH378802	MH374035	–	Zhang and Li 2018
Erythrophylloporus fagicola	Garay215	Mexico	MH614667	MH614716	MH614762	MH614830	This study
Erythrophylloporus paucicarpus	OR1151	Thailand	MH614670	MH614719	MH614765	MH614831	This study
Erythrophylloporus paucicarpus	OR0689	Thailand	MH614668	MH614717	MH614763	–	This study
Erythrophylloporus paucicarpus	OR1135	Thailand	MH614669	MH614718	MH614764	–	This study
Erythrophylloporus suthepensis	SV0236	Thailand	MH614672	MH614721	MH614767	MH614832	This study
Erythrophylloporus suthepensis	OR0615B	Thailand	MH614671	MH614720	MH614766	–	This study
Fistulinella prunicolor	REH9880	Australia	MH614676	MH614725	MH614771	MH614840	Vadthanarat et al. 2019
Fistulinella prunicolor	REH9502	Australia	MG212544	MG212588	MG212630	–	Vadthanarat et al. 2018
Gymnogaster boletoides	NY01194009	Australia	–	KT990768	KT990406	–	Wu et al. 2016
Harrya atriceps	REH7403	Costa Rica	–	JX889702	–	–	Halling et al. 2012b
Harrya chromapes	HKAS50527	China	–	KF112270	KF112792	–	Wu et al. 2014
Harrya chromapes	HKAS49416	China	HQ326840	HQ326863	–	–	Li et al. 2011
Harrya moniliformis	HKAS49627	China	–	KT990881	KT990500	–	Wu et al. 2016
Heimioporus cf. mandarinus	OR0661	Thailand	MG212545	MG212589	MG212631	MH614841*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Heimioporus japonicus	OR0114	Thailand	KT823971	KT824037	KT824004	MH614842*	Raspé et al. 2016; *Vadthanarat et al. 2019
Heimioporus retisporus	HKAS52237	China	–	KF112228	KF112806	–	Wu et al. 2014
Heimioporus sp.	OR0218	Thailand	MG212546	MG212590	MG212632	–	Vadthanarat et al. 2018
Hemileccinum depilatum	AF2845	Belgium	MG212547	MG212591	MG212633	MH614843*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Hemileccinum impolitum	ADK4078	Belgium	MG212548	MG212592	MG212634	MH614844*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Hemileccinum indecorum	OR0863	Thailand	MH614677	MH614726	MH614772	MH614845	Vadthanarat et al. 2019
Hemileccinum rugosum	HKAS84970	China	–	KT990773	KT990412	–	Wu et al. 2016
Hortiboletus amygdalinus	HKAS54166	China	–	KT990777	KT990416	–	Wu et al. 2016
Hortiboletus rubellus	VDKO0403	Belgium	MH614679	–	MH614774	MH614847	*Vadthanarat et al. 2019
Hortiboletus sp.	HKAS51239	China	–	KF112184	KF112695	–	Wu et al. 2014
Hortiboletus sp.	HKAS50466	China	–	KF112183	KF112694	–	Wu et al. 2014
Hortiboletus sp.	HKAS51292	China	–	KF112181	KF112692	–	Wu et al. 2014
Hortiboletus sp.	HKAS76673	China	–	KF112182	KF112693	–	Wu et al. 2014
Hortiboletus subpaludosus	HKAS59608	China	–	KF112185	KF112696	–	Wu et al. 2014
Hourangia cf. pumila	OR0762	Thailand	MH614680	MH614728	MH614775	MH614848	Vadthanarat et al. 2019
Hourangia cheoi	HKAS74744	China	–	KF112285	KF112772	–	Wu et al. 2014
Hourangia cheoi	Zhu108	China	–	KP136979	KP136928	–	Zhu et al. 2015
Hourangia nigropunctata	HKAS 57427	China	–	KP136927	KP136978	–	Zhu et al. 2015
Hymenoboletus luteopurpureus	HKAS46334	China	–	KF112271	KF112795	–	Wu et al. 2014
Imleria badia	VDKO0709	Belgium	KT823983	KT824049	KT824016	MH614849*	Raspé et al. 2016; *Vadthanarat et al. 2019
Imleria obscurebrunnea	OR0263	China	MH614681	MH614729	MH614776	MH614850	Vadthanarat et al. 2019
Imleria subalpina	HKAS74712	China	–	KF112189	KF112706	–	Wu et al. 2014
Lanmaoa angustispora	HKAS74759	China	–	KM605155	KM605178	–	Wu et al. 2015
Lanmaoa angustispora	HKAS74765	China	–	KF112159	KF112680	–	Wu et al. 2014
Lanmaoa asiatica	HKAS54094	China	–	KF112161	KF112682	–	Wu et al. 2014
Lanmaoa asiatica	HKAS63603	China	–	KM605153	KM605176	–	Wu et al. 2015
Lanmaoa asiatica	OR0228	China	MH614682	MH614730	MH614777	MH614851	Vadthanarat et al. 2019
Lanmaoa carminipes	BOTH4591	USA	MG897419	MG897429	MG897439	MH614852*	Phookamsak et al. 2019, *Vadthanarat et al. 2019
Lanmaoa flavorubra	NY775777	Costa Rica	–	KF112160	KF112681	–	Wu et al. 2014
Lanmaoa pallidorosea	BOTH4432	USA	MG897417	MG897427	MG897437	MH614853*	Phookamsak et al. 2019, *Vadthanarat et al. 2019
Lanmaoa sp.	HKAS52518	China	–	KF112162	KF112683	–	Wu et al. 2014
Lanmaoa sp.	OR0130	Thailand	MH614683	MH614731	MH614778	MH614854	Vadthanarat et al. 2019
Lanmaoa sp.	OR0370	Thailand	MH614684	MH614732	MH614779	MH614855	Vadthanarat et al. 2019
Leccinellum aff. crocipodium	HKAS76658	China	–	KF112252	KF112728	–	Wu et al. 2014
Leccinellum aff. griseum	KPM-NC-0017832	Japan	KC552164	JN378450*	–	–	unpublished, *Orihara et al. 2012
Leccinellum corsicum	Buf4507	USA	–	KF030435	–	–	Nuhn et al. 2013
Leccinellum cremeum	HKAS90639	China	–	KT990781	KT990420	–	Wu et al. 2016
Leccinellum crocipodium	VDKO1006	Belgium	KT823988	KT824054	KT824021	MH614856*	Raspé et al. 2016; *Vadthanarat et al. 2019
Leccinellum sp.	KPM-NC-0018041	Japan	KC552165	KC552094	–	–	Orihara et al. 2016
Leccinellum sp.	OR0711	Thailand	MH614685	MH614733	MH614780	–	Vadthanarat et al. 2019
Leccinum monticola	HKAS76669	China	–	KF112249	KF112723	–	Wu et al. 2014
Leccinum quercinum	HKAS63502	China	–	KF112250	KF112724	–	Wu et al. 2014
Leccinum scabrum	RW105a	Belgium	KT823979	KT824045	KT824012	MH614857*	Raspé et al. 2016; *Vadthanarat et al. 2019
Leccinum scabrum	VDKO0938	Belgium	MG212549	MG212593	MG212635	MH614858*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Leccinum scabrum	KPM-NC-0017840	Scotland	KC552170	JN378455	–	–	Orihara et al. 2016; Orihara et al. 2012
Leccinum schistophilum	VDKO1128	Belgium	KT823989	KT824055	KT824022	MH614859*	Raspé et al. 2016; *Vadthanarat et al. 2019
Leccinum variicolor	VDKO0844	Belgium	MG212550	MG212594	MG212636	MH614860*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Mucilopilus castaneiceps	HKAS75045	China	–	KF112211	KF112735	–	Wu et al. 2014
Neoboletus brunneissimus	HKAS52660	China	–	KF112143	KF112650	–	Wu et al. 2014
Neoboletus brunneissimus	HKAS57451	China	–	KM605149	KM605172	–	Wu et al. 2015
Neoboletus brunneissimus	OR0249	China	MG212551	MG212595	MG212637	MH614861*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Neoboletus hainanensis	HKAS59469	China	–	KF112175	KF112669	–	Wu et al. 2014
Neoboletus junquilleus	AF2922	France	MG212552	MG212596	MG212638	MH614862*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Neoboletus magnificus	HKAS54096	China	–	KF112149	KF112654	–	Wu et al. 2014
Neoboletus magnificus	HKAS74939	China	–	KF112148	KF112653	–	Wu et al. 2014
Neoboletus sanguineoides	HKAS55440	China	–	KF112145	KF112652	–	Wu et al. 2014
Neoboletus sp.	HKAS76851	China	–	KF112144	KF112651	–	Wu et al. 2014
Neoboletus sp.	OR0128	Thailand	MH614686	MH614734	MH614781	MH614863	Vadthanarat et al. 2019
Neoboletus tomentulosus	HKAS53369	China	–	KF112154	KF112659	–	Wu et al. 2014
Neoboletus erythropus	VDKO0690	Belgium	KT823982	KT824048	KT824015	MH614864*	Raspé et al. 2016; *Vadthanarat et al. 2019
Octaviania asahimontana	KPM-NC-17824	Japan	KC552154	JN378430	–	–	Orihara et al. 2016; Orihara et al. 2012
Octaviania asterosperma	AQUI3899	Italy	KC552159	KC552093	–	–	Orihara et al. 2016
Octaviania celatifilia	KPM-NC-17776	Japan	KC552147	JN378416	–	–	Orihara et al. 2016; Orihara et al. 2012
Octaviania cyanescens	PNW-FUNGI-5603	USA	KC552160	JN378438	–	–	Orihara et al. 2016; Orihara et al. 2012
Octaviania decimae	KPM-NC17763	Japan	KC552145	JN378409	–	–	Orihara et al. 2016; Orihara et al. 2012
Octaviania tasmanica	MEL2128484	Australia	KC552157	JN378437	–	–	Orihara et al. 2016; Orihara et al. 2012
Octaviania tasmanica	MEL2341996	Australia	KC552156	JN378436	–	–	Orihara et al. 2016; Orihara et al. 2012
Octaviania zelleri	MES270	USA	KC552161	JN378440	–	–	Orihara et al. 2016; Orihara et al. 2012
Parvixerocomus pseudoaokii	OR0155	China	MG212553	MG212597	MG212639	MH614865	Vadthanarat et al. 2019
Phylloporus bellus	OR0473	China	MH580778	MH580798	MH580818	MH614866*	Chuankid et al. 2019; *Vadthanarat et al. 2019
Phylloporus brunneiceps	OR0050	Thailand	KT823968	KT824034	KT824001	MH614867*	Raspé et al. 2016; *Vadthanarat et al. 2019
Phylloporus castanopsidis	OR0052	Thailand	KT823969	KT824035	KT824002	MH614868*	Raspé et al. 2016; *Vadthanarat et al. 2019
Phylloporus imbricatus	HKAS68642	China	–	KF112299	KF112786	–	Wu et al. 2014
Phylloporus luxiensis	HKAS75077	China	–	KF112298	KF112785	–	Wu et al. 2014
Phylloporus maculatus	OR0285	China	MH580780	MH580800	MH580820	–	Chuankid et al. 2019
Phylloporus pelletieri	WU18746	Austria	MH580781	MH580801	MH580821	MH614869*	Chuankid et al. 2019; *Vadthanarat et al. 2019
Phylloporus pusillus	OR1158	Thailand	MH580783	MH580803	MH580823	MH614870*	Chuankid et al. 2019; *Vadthanarat et al. 2019
Phylloporus rhodoxanthus	WU17978	USA	MH580785	MH580805	MH580824	MH614871*	Chuankid et al. 2019; *Vadthanarat et al. 2019
Phylloporus rubeolus	OR0251	China	MH580786	MH580806	MH580825	MH614872*	Chuankid et al. 2019; *Vadthanarat et al. 2019
Phylloporus rubiginosus	OR0169	China	MH580788	MH580808	MH580827	MH614873*	Chuankid et al. 2019; *Vadthanarat et al. 2019
Phylloporus sp.	OR0896	Thailand	MH580790	MH580810	MH580829	MH614874*	Chuankid et al. 2019; *Vadthanarat et al. 2019
Phylloporus subbacillisporus	OR0436	China	MH580792	MH580812	MH580831	MH614875*	Chuankid et al. 2019; *Vadthanarat et al. 2019
Phylloporus subrubeolus	BC022	Thailand	MH580793	MH580813	MH580832	MH614876*	Chuankid et al. 2019; *Vadthanarat et al. 2019
Phylloporus yunnanensis	OR0448	China	MG212554	MG212598	MG212640	MH614877*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Porphyrellus castaneus	OR0241	China	MG212555	MG212599	MG212641	MH614878*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Porphyrellus cf. nigropurpureus	ADK3733	Benin	MH614687	MH614735	MH614782	MH614879	Vadthanarat et al. 2019
Porphyrellus nigropurpureus	HKAS74938	China	–	KF112246	KF112763	–	Wu et al. 2014
Porphyrellus porphyrosporus	MB97-023	Germany	DQ534609	GU187734	GU187800	–	Binder & Hibbett 2006; Binder et al. 2010
Porphyrellus sp.	HKAS53366	China	–	KF112241	KF112716	–	Wu et al. 2014
Porphyrellus sp.	JD659	Burundi	MH614688	MH614736	MH614783	MH614880	Vadthanarat et al. 2019
Porphyrellus sp.	OR0222	Thailand	MH614689	MH614737	MH614784	MH614881	Vadthanarat et al. 2019
Pulveroboletus aff. ravenelii	ADK4360	Togo	KT823957	KT824023	KT823990	MH614882*	Raspé et al. 2016; *Vadthanarat et al. 2019
Pulveroboletus aff. ravenelii	ADK4650	Togo	KT823959	KT824025	KT823992	MH614883*	Raspé et al. 2016; *Vadthanarat et al. 2019
Pulveroboletus aff. ravenelii	HKAS53351	China	–	KF112261	KF112712	–	Wu et al. 2014
Pulveroboletus fragrans	OR0673	Thailand	KT823977	KT824043	KT824010	MH614884*	Raspé et al. 2016; *Vadthanarat et al. 2019
Pulveroboletus ravenelii	REH2565	USA	KU665635	KU665636	KU665637	MH614885*	Raspé et al. 2016; *Vadthanarat et al. 2019
Pulveroboletus sp.	HKAS74933	China	–	KF112262	KF112713	–	Wu et al. 2014
Retiboletus aff. nigerrimus	OR0049	Thailand	KT823967	KT824033	KT824000	MH614886*	Raspé et al. 2016; *Vadthanarat et al. 2019
Retiboletus brunneolus	HKAS52680	China	–	KF112179	KF112690	–	Wu et al. 2014
Retiboletus fuscus	HKAS59460	China	–	JQ928580	JQ928601	–	Hosen et al. 2013
Retiboletus fuscus	OR0231	China	MG212556	MG212600	MG212642	MH614887*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Retiboletus griseus	MB03-079	USA	KT823964	KT824030	KT823997	MH614888*	Raspé et al. 2016; *Vadthanarat et al. 2019
Retiboletus kauffmanii	OR0278	China	MG212557	MG212601	MG212643	MH614889*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Retiboletus nigerrimus	HKAS53418	China	–	KT990824	KT990462	–	Wu et al. 2016
Retiboletus sinensis	HKAS59832	China	–	KT990827	KT990464	–	Wu et al. 2016
Retiboletus zhangfeii	HKAS59699	China	–	JQ928582	JQ928603	–	Hosen et al. 2013
Rhodactina himalayensis	CMU25117	Thailand	MG212558	MG212602, MG212603	–	–	Vadthanarat et al. 2018
Rhodactina rostratispora	SV170	Thailand	MG212560	MG212605	MG212645	–	Vadthanarat et al. 2018
Rossbeevera cryptocyanea	KPM-NC17843	Japan	KT581441	KC552072	–	–	Orihara et al. 2016
Rossbeevera eucyanea	TNS-F-36986	Japan	KC552115	KC552068	–	–	Orihara et al. 2016
Rossbeevera griseovelutina	TNS-F-36989	Japan	KC552124	KC552076	–	–	Orihara et al. 2016
Rossbeevera pachydermis	KPM-NC23336	New Zealand	KJ001064	KP222912	–	–	Orihara et al. 2016
Rossbeevera vittatispora	OSC61484	Australia	KC552109	JN378446	–	–	Orihara et al. 2016; Orihara et al. 2012
Royoungia reticulata	HKAS52253	China	–	KT990786	KT990427	–	Wu et al. 2016
Royoungia rubina	HKAS53379	China	–	KF112274	KF112796	–	Wu et al. 2014
Rubroboletus latisporus	HKAS80358	China	–	KP055020	KP055029	–	Zhao et al. 2014b
Rubroboletus legaliae	VDKO0936	Belgium	KT823985	KT824051	KT824018	MH614890*	Raspé et al. 2016; *Vadthanarat et al. 2019
Rubroboletus rhodosanguineus	BOTH4263	USA	MG897416	MG897426	MG897436	MH614891*	Phookamsak et al. 2019, *Vadthanarat et al. 2019
Rubroboletus rhodoxanthus	HKAS84879	Germany	–	KT990831	KT990468	–	Wu et al. 2016
Rubroboletus satanas	VDKO0968	Belgium	KT823986	KT824052	KT824019	MH614892*	Raspé et al. 2016; *Vadthanarat et al. 2019
Rubroboletus sinicus	HKAS68620	China	–	KF112146	KF112661	–	Wu et al. 2014
Rubroboletus sp.	HKAS68679	China	–	KF112147	KF112662	–	Wu et al. 2014
Rugiboletus brunneiporus	HKAS68586	China	–	KF112197	KF112719	–	Wu et al. 2014
Rugiboletus brunneiporus	HKAS83209	China	–	KM605144	KM605168	–	Wu et al. 2015
Rugiboletus extremiorientalis	HKAS63635	China	–	KF112198	KF112720	–	Wu et al. 2014
Rugiboletus extremiorientalis	HKAS76663	China	–	KM605147	KM605170	–	Wu et al. 2015
Rugiboletus extremiorientalis	OR0406	Thailand	MG212562	MG212607	MG212647	MH614893*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Rugiboletus sp.	HKAS55373	China	–	KF112303	KF112804	–	Wu et al. 2014
Singerocomus inundabilis	TWH9199	Guyana	MH645588	MH645596	LC043089*	MH645609	*Henkel et al. 2016; Vadthanarat et al. 2019
Singerocomus rubriflavus	TWH9585	Guyana	MH645589	MH645597	–	MH645610	Vadthanarat et al. 2019
Spongiforma thailandica	DED7873	Thailand	MG212563	KF030436*	MG212648	MH614894**	*Nuhn et al. 2013; Vadthanarat et al. 2018; **Vadthanarat et al. 2019
Strobilomyces atrosquamosus	HKAS55368	China	–	KT990839	KT990476	–	Wu et al. 2016
Strobilomyces echinocephalus	OR0243	China	MG212564	MG212608	MG212649	–	Vadthanarat et al. 2018
Strobilomyces strobilaceus	RW103	Belgium	KT823978	KT824044	KT824011	MH614895*	Raspé et al. 2016; *Vadthanarat et al. 2019
Strobilomyces strobilaceus	MB-03-102	USA	DQ534607*	AY883428	AY786065	–	Binder and Hibbett 2006*, Unpublished
Strobilomyces mirandus	OR0115	Thailand	KT823972	KT824038	KT824005	MH614896*	Raspé et al. 2016; *Vadthanarat et al. 2019
Strobilomyces sp.	OR0259	China	MG212565	MG212609	MG212650	MH614897*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Strobilomyces sp.	OR0778	Thailand	MG212566	MG212610	MG212651	MH614899*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Strobilomyces sp.	OR0319	Thailand	MH614690	MH614738	MH614785	MH614898	Vadthanarat et al. 2019
Strobilomyces sp.	OR1092	Thailand	MH614691	MH614739	MH614786	MH614900	Vadthanarat et al. 2019
Strobilomyces verruculosus	HKAS55389	China	–	KF112259	KF112813	–	Wu et al. 2014
Suillellus amygdalinus	112605ba	USA	–	JQ327024	–	–	Halling et al. 2012a
Suillellus luridus	VDKO0241b	Belgium	KT823981	KT824047	KT824014	MH614901*	Raspé et al. 2016; *Vadthanarat et al. 2019
Suillellus queletii	VDKO1185	Belgium	MH645590	MH645598	MH645604	MH645611	Vadthanarat et al. 2019
Suillellus subamygdalinus	HKAS57262	China	–	KF112174	KF112660	–	Wu et al. 2014
Sutorius australiensis	REH9441	Australia	MG212567	JQ327032*	MG212652	–	*Halling et al. 2012a; Vadthanarat et al. 2018
Sutorius eximius	REH9400	USA	MG212568	JQ327029*	MG212653	MH614902**	*Halling et al. 2012a; Vadthanarat et al. 2018; **Vadthanarat et al. 2019
Sutorius ferrugineus	HKAS77718	China	–	KT990789	KT990431	–	Wu et al. 2016
Sutorius flavidus	HKAS59443	China	–	KU974136	KU974144	–	Wu et al. 2016
Sutorius rubriporus	HKAS83026	China	–	KT990795	KT990437	–	Wu et al. 2016
Sutorius sanguineus	HKAS80823	China	–	KT990802	KT990442	–	Wu et al. 2016
Sutorius sp.	OR0378B	Thailand	MH614692	MH614740	MH614787	MH614903	Vadthanarat et al. 2019
Sutorius sp.	OR0379	Thailand	MH614693	MH614741	MH614788	MH614904	Vadthanarat et al. 2019
Tengioboletus glutinosus	HKAS53425	China	–	KF112204	KF112800	–	Wu et al. 2014
Tengioboletus reticulatus	HKAS53426	China	–	KF112313	KF112828	–	Wu et al. 2014
Tengioboletus sp.	HKAS76661	China	–	KF112205	KF112801	–	Wu et al. 2014
Turmalinea persicina	KPM-NC18001	Japan	KC552130	KC552082	–	–	Orihara et al. 2016
Turmalinea yuwanensis	KPM-NC18011	Japan	KC552138	KC552089	–	–	Orihara et al. 2016
Tylocinum griseolum	HKAS50281	China	–	KF112284	KF112730	–	Wu et al. 2014
Tylopilus alpinus	HKAS55438	China	–	KF112191	KF112687	–	Wu et al. 2014
Tylopilus atripurpureus	HKAS50208	China	–	KF112283	KF112799	–	Wu et al. 2014
Tylopilusballoui s.l.	OR0039	Thailand	KT823965	KT824031	KT823998	MH614905*	Raspé et al. 2016; *Vadthanarat et al. 2019
Tylopilus brunneirubens	HKAS53388	China	–	KF112192	KF112688	–	Wu et al. 2014
Tylopilus felleus	VDKO0992	Belgium	KT823987	KT824053	KT824020	MH614906*	Raspé et al. 2016; *Vadthanarat et al. 2019
Tylopilus ferrugineus	BOTH3639	USA	MH614694	MH614742	MH614789	MH614907	Vadthanarat et al. 2019
Tylopilus otsuensis	HKAS53401	China	–	KF112224	KF112797	–	Wu et al. 2014
Tylopilus sp.	HKAS74925	China	–	KF112222	KF112739	–	Wu et al. 2014
Tylopilus sp.	HKAS50229	China	–	KF112216	KF112769	–	Wu et al. 2014
Tylopilus sp.	JD598	Gabon	MH614695	MH614743	MH614790	MH614908	Vadthanarat et al. 2019
Tylopilus sp.	OR0252	China	MG212569	MG212611	MG212654	MH614909*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Tylopilus sp.	OR0542	Thailand	MG212570	MG212612	MG212655	MH614910*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Tylopilus sp.	OR0583	Thailand	MH614696	MH614744	–	–	Vadthanarat et al. 2019
Tylopilus sp.	OR1009	Thailand	MH614697	–	MH614791	MH614911	Vadthanarat et al. 2019
Tylopilus vinaceipallidus	HKAS50210	China	–	KF112221	KF112738	–	Wu et al. 2014
Tylopilus vinaceipallidus	OR0137	China	MG212571	MG212613	MG212656	MH614912*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Tylopilus violaceobrunneus	HKAS89443	China	–	KT990886	KT990504	–	Wu et al. 2016
Tylopilus virens	KPM-NC-0018054	Japan	KC552174	KC552103	–	–	Unpublished
Veloporphyrellus alpinus	HKAS68301	China	JX984515	JX984550	–	–	Li et al. 2014
Veloporphyrellus conicus	REH8510	Belize	MH614698	MH614745	MH614792	MH614913	Vadthanarat et al. 2019
Veloporphyrellus gracilioides	HKAS53590	China	–	KF112210	KF112734	–	Wu et al. 2014
Veloporphyrellus pseudovelatus	HKAS59444	China	JX984519	JX984553	–	–	Li et al. 2014
Veloporphyrellus velatus	HKAS63668	China	JX984523	JX984554	–	–	Li et al. 2014
Xanthoconium affine	NY00815399	USA	–	KT990850	KT990486	–	Wu et al. 2016
Xanthoconium porophyllum	HKAS90217	China	–	KT990851	KT990487	–	Wu et al. 2016
Xanthoconium sinense	HKAS77651	China	–	KT990853	KT990488	–	Wu et al. 2016
Xerocomellus chrysenteron	VDKO0821	Belgium	KT823984	KT824050	KT824017	MH614914*	Raspé et al. 2016; *Vadthanarat et al. 2019
Xerocomellus cisalpinus	ADK4864	Belgium	KT823960	KT824026	KT823993	MH614915*	Raspé et al. 2016; *Vadthanarat et al. 2019
Xerocomellus communis	HKAS50467	China	–	KT990858	KT990494	–	Wu et al. 2016
Xerocomellus corneri	HKAS90206	Philippines	–	KT990857	KT990493	–	Wu et al. 2016
Xerocomellus porosporus	VDKO0311	Belgium	MH614678	MH614727	MH614773	MH614846	Vadthanarat et al. 2019
Xerocomellus ripariellus	VDKO0404	Belgium	MH614699	MH614746	MH614793	MH614916	Vadthanarat et al. 2019
Xerocomellus sp.	HKAS56311	China	–	KF112170	KF112684	–	Wu et al. 2014
Xerocomus aff. macrobbii	HKAS56280	China	–	KF112265	KF112708	–	Wu et al. 2014
Xerocomus fulvipes	HKAS76666	China	–	KF112292	KF112789	–	Wu et al. 2014
Xerocomus magniporus	HKAS58000	China	–	KF112293	KF112781	–	Wu et al. 2014
Xerocomus s.s. sp.	OR0237	China	MH580796	MH580816	MH580835	–	Chuankid et al. 2019
Xerocomus s.s. sp.	OR0443	China	MH580797	MH580817	MH580836	MH614917*	Chuankid et al. 2019; *Vadthanarat et al. 2019
Xerocomus sp.	OR0053	Thailand	MH580795	MH580815	MH580834	MH614918*	Chuankid et al. 2019; *Vadthanarat et al. 2019
Xerocomus subtomentosus	VDKO0987	Belgium	MG212572	MG212614	MG212657	MH614919*	Vadthanarat et al. 2018; *Vadthanarat et al. 2019
Zangia citrina	HKAS52684	China	HQ326850	HQ326872	–	–	Li et al. 2011
Zangia olivacea	HKAS45445	China	HQ326854	HQ326873	–	–	Li et al. 2011
Zangia olivaceobrunnea	HKAS52272	China	HQ326857	HQ326876	–	–	Li et al. 2011
Zangia roseola	HKAS75046	China	–	KF112269	KF112791	–	Wu et al. 2014
Zangia roseola	HKAS51137	China	HQ326858	HQ326877	–	–	Li et al. 2011

Figure 1.

Phylogenetic tree inferred from the four-gene dataset (atp6, rpb2, tef1 and cox3), including species and selected using Maximum Likelihood and Bayesian Inference methods (ML tree is presented). The two and nine species in subfamily were used as outgroup. Most of the taxa not belonging to the group were collapsed into subfamilies. All generic clades, including one undescribed generic clade in group that were highly supported, were also collapsed. Bootstrap support values (BS ≥ 70%) and posterior probabilities (PP ≥ 0.90) are shown above the supported branches.

Taxonomy

Ming Zhang & T.H. Li, Mycosystema 37(9): 1111–1126 (2018)

Description.

Basidiomata stipitate-pileate with lamellate hymenophore, small to medium-sized; Pileus subhemispheric to convex when young becoming convex to plano-convex to plano-subdepressed when old, dry, pruinose or velutinous, subtomentose to tomentose, yellowish-orange to red; pileus context vivid yellow to yellowish-orange. Hymenophore lamellae, slightly thick, decurrent, deeply yellowish-orange to deep orange or reddish-orange to orange red or brownish-orange to red. Stipe central to slightly excentric, cylindrical or clavate, yellowish- to reddish-orange to yellowish red, with scattered yellowish- to reddish-orange to red scales on surface, with bright yellow basal mycelium; stipe context solid, yellow to reddish-yellow or yellow with olivaceous brown. Staining none or slightly reddening or greening or gradually bluing or dark violet, greyish to blackish-blue when bruised on the basidiomata or context or lamellae. Spore print olivaceous brown. Basidiospores ovoid or ellipsoid to broadly ellipsoid to subovoid, thin-walled, with non-bacillate surface. Basidia clavate to narrowly clavate. Cheilocystidia and pleurocystidia present, subcylindrical or narrowly conical to narrowly fusiform to ventricose with slightly or obtuse apex, thin-walled, sometimes thick-walled, originating more or less deeply in the sub hymenium or from hymenophoral trama, hyaline or sometimes containing yellowish-brown pigments. Pileipellis a subcutis to cutis to trichoderm to palisadoderm, composed of thin to slightly thick-walled hyphae. Clamp connection absent in all tissues.

Typus species.

Ming Zhang & T.H. Li.

Known Distribution.

Asia (China and Thailand), North America (Mexico) and Central America (Costa Rica).

Remarks.

is easily distinguished from other lamellate genera by a combination of the following characters: the intense orange to red colour of the pileus and lamellae; bright yellow basal mycelium; ovoid or ellipsoid to broadly ellipsoid to subovoid basidiospores with non-bacillate surface; pleurocystidia originating more or less deeply in the subhymenium or from hymenophoral trama.

Raspé, Vadthanarat & Lumyong sp. nov.

823605

Figs 2A , 3A , 4A and 5

Figure 2.

Habits of Thai species AB. Scale bars: 1 cm.

Figure 3.

Scanning electron micrographs of basidiospores from Thai show smooth surfaces AB. Scale bars: 1 µm.

Figure 4.

Origin of pleurocystidia (white arrow), more or less deep in the subhymenium or from hymenophoral trama AB – hymenium (H), subhymenium (SH), Scale bars: 25 µm (A–B).

Figure 5.

Microscopic features of A basidiospores B basidia C cheilocystidia D pleurocystidia E pileipellis F stipitipellis. – Scale bars: 10 µm (A–B); 50 µm (C–F). All drawings were made from the type (OR1151).

Holotype.

THAILAND, Chiang Mai Province, Mae On District, Huay Kaew, , elev. 700 m, 16 August 2016, O. Raspé & S. Vadthanarat, OR1151, (holotype: CMUB, isotype: BR).

Etymology.

from Latin “pauci-” meaning few and “carpus” meaning fruits or what is harvested, refers to the low number of basidiomata produced.

Basidiomata stipitate-pileate with lamellate hymenophore, small to medium-sized. Pileus 2.3–5.5 cm in diameter, plano-convex with involute margin at first becoming almost plane to slightly depressed with inflexed to straight margin, irregularly and coarsely crenate in age, sometimes with low and broad umbo and a few to several verrucae, especially when young; surface more or less even, tomentose, dull, slightly moist, colour distribution patchy with red to brownish-orange (9B8 to 9C8), brownish-red (10E8 to 10D8) becoming orange-red to orange (8B/C8 to 6B7) at the margin when old, abruptly paler at the margin. Pileus context 3–4 mm thick half-way to the margin, tough, colour distribution even, yellow (3A6) to yellowish-orange (4A5), slowly reddening when exposed, especially at the centre and above lamellae. Stipe 2.4–4.5 × 0.7–1.3 cm, central or sometimes slightly eccentric, clavate with strigose base, straight to curved, terete, even, dull, dry, tomentose, yellowish-orange (4–5A7–8) to orange (6–7A7–8) with orange to yellowish-orange (7B/C7–8 to 4A7–8) coarse scales, with bright yellow (2A6–7) basal mycelium. Stipe context solid, fleshy fibrous, yellow marbled with olivaceous brown (4D5, 5D5). Hymenophore lamellate; lamellae decurrent, close, thick, 40–42 lamellae, with 4–6 different lengths of lamellullae, 2–4.5 mm wide half-way to margin, somewhat anastomosing, especially near the stipe, yellowish-orange (4-5A6-7) with orange to red tinge, slightly reddening when bruised. Odour rubbery; Taste not recorded. Spore print olive-brown (4E7).

Macrochemical reactions. KOH on pileus and stipe surface deep red at first, then red-brown to brown, with pale orange aura on the pileus; brown on pileus context, dark red-brown on stipe context; brownish-orange on hymenophore. NH4OH on pileus first red, then orange; on pileus context bluing at first then with a greenish tinge; on stipe surface and context briefly bluing; no reaction on hymenophore.

Basidiospores [208/4/4] (5.9–)6.1–6.8–7.5(–8) × (4.1–)4.6–5.1–5.5(–6) µm, Q = (1.2–)1.23–1.33–1.48(–1.56); from the type (OR1151) (6–)6.3–6.8–7.5(–7.8) × (4.6–)4.8–5.2–5.5(–6) µm, Q = (1.2–)1.22–1.31–1.48(–1.56), N = 88, broadly ellipsoid to ellipsoid, smooth under light microscope and SEM, yellowish to pale brown in water, hyaline in 5% KOH, thin-walled, inamyloid. Basidia 4–spored, (37.8–)38–45.6–54.7(–54.8) × (6.2–)–6.3–8–9.5(–9.6) µm, narrowly clavate to subcylindrical, attenuated towards the base, clampless, hyaline to yellowish hyaline in water, Melzer’s reagent and 5% KOH; sterigmata up to 5.5 µm long. Cheilocystidia (35.4–)35.5–49.9–61.8(–61.9) × (3.9–)3.9–6–7.7(–7.7) µm, narrowly fusiform with obtuse apex, projecting up to 30 µm, thin-walled, smooth, yellowish hyaline in water, in 5% KOH and NH4OH, inamyloid. Pleurocystidia (66.9–)67.4–80.3–93.5(–94.7) × (8.8–)8.9–11.7–16.1(–16.2) µm, abundant, narrowly conical with obtuse, somewhat prolonged apex, projecting up to 32 µm, thin-walled, smooth, yellowish hyaline in water, in 5% KOH and NH4OH, arising more or less deeply in the subhymenium or from hymenophoral trama, inamyloid. Hymenophoral trama subregular near the pileus context becoming slightly divergent near the edge, 87–238 µm wide, widest near the pileus context then getting narrower when close to the edge, composed of clampless hyphae 4.5–8 µm wide, yellowish hyaline in water, hyaline in 5% KOH and NH4OH. Pileipellis a palisadoderm to trichoderm 83–165 µm thick, composed of slightly thick-walled, cylindrical hyphae, terminal cells 16–46 × 4–6.5 µm with rounded apex, hyaline or yellowish hyaline to yellowish-orange hyaline hyphae ornamented with scattered fine epiparietal encrustation when observed in water, hyaline to yellowish hyaline in 5% KOH and NH4OH, inamyloid. Pileus trama composed of slightly thick-walled, strongly interwoven hyphae, 4.5–8.5 µm wide, inamyloid. Stipitipellis a disrupted palisadoderm perpendicular to the stipe axis, 63–145 µm thick, composed of slightly thick-walled, slightly rough, cylindrical, yellow to yellowish-orange in water, yellowish hyaline hyphae in 5% KOH and NH4OH, terminal cells 13–57 × 3–8 µm, cylindrical to irregular hyphae with rounded to notched apex; wall covered by dispersed fine encrustations when observed in water. Caulocystidia not seen. Stipe trama composed of parallel hyphae, densely packed, 4–8.5 µm wide; hyphae wall covered by dispersed encrustations when observed in water. Clamp connections not seen in any tissue.

Habit and habitat.

On soil, mostly solitary in dipterocarp forest dominated by , , , , spp. and spp.

Known distribution.

Currently known only from Chiang Mai Province, northern Thailand.

Additional specimens examined.

– THAILAND, Chiang Mai Province, Muang District, Doi Suthep-Pui National Park, 18°48'05"N–98°55'40"E, elev. 800 m, 17 May 2015, O. Raspé, OR0615A (CMUB, BKF, BR); Mae Taeng District, Baan Tapa, , elev. 1035 m, 4 August 2015, O. Raspé & A. Thawthong, OR0689 (MFLU, BR); Mae On District, Huay Kaew, , elev. 780 m, 15 August 2016, O. Raspé & S. Vadthanarat, OR1135 (CMUB, BR).

is characterised by the following combination of features: orange to brownish- to orange-red basidiomata, yellowish-orange lamellae that turn slightly red when bruised; pileus context yellow to yellowish-orange that slowly reddens when exposed and mostly occurring as solitary basidiomata.

In the inferred molecular phylogeny, clustered close to and (65% BS and 1 PP), but the two species are different from in that they have darker lamellae which are orange to orange red or brownish-orange. Moreover, spores of are wider and longer (5.9–8 × 4.1–6 µm) than those of (4.6–5.9 × 3.5–4.5 µm) and, on average, longer than those of (5.5–7 × 4.5–5.5 µm) (Zhang and Li 2018). also differs from both species by the slight reddening of the context and lamellae when exposed or bruised, whereas context seems unchanging when exposed and lamellae turn blue when bruised. In , the context slowly turns dark violet, blackish-blue to dark blue when exposed and lamellae turn greyish-blue, or greyish-green when bruised (Zhang and Li 2018).

is different from the two New World species by the reddening of the context, whereas in , it turns blue and, in , the colour remains unchanged when exposed. Moreover, has somewhat thick-walled (0.8–3.5 µm) pleurocystidia (Montoya and Bandala 2011), which are not found in . Although the basidiospores of and are similar in size ( = 6.0–7.5 × 4–5.5 µm), they differ in shape, being more ovoid in than in . also differs from by macro-chemical reactions. In the latter, the pileus surface and pileus context are unchanging with NH4OH (Halling et al. 1999), while in , the pileus becomes orange to red and the pileus context initially turns blue then with a greenish tinge.

Vadthanarat, Raspé & Lumyong sp. nov.

823606

Figs 2B , 3B , 4B and 6

Figure 6.

Microscopic features of A basidiospores B basidia C cheilocystidia D pleurocystidia E pileipellis F stipitipellis showing some dark caulocystidia mixed with slightly rough, cylindrical to irregular hyphae. – Scale bars: 10 µm (A–B); 50 µm (C–F). All drawings were made from the type (SV0236).

THAILAND, Chiang Mai Province, Muang District, Doi Suthep-Pui National Park, , elev. 645 m, 25 August 2015, S. Vadthanarat, SV0236, (holotype CMUB, isotype BKF, BR).

Refers to the type locality Doi Suthep.

Basidiomata stipitate-pileate with lamellate hymenophore, small-sized. Pileus (1.0–)2.5– 3.5 cm in diameter, subumbonate with involute margin at first, becoming convex to plano-convex with inflexed margin; surface even with some small pustules, tomentose, dull, slightly moist, yellow (3–4A4– 5) becoming light orange to orange-red (5–6A5–7 to 7–8A–B7–8) with patches of light yellow to light orange (4–5A5–6) becoming brownish-orange to dull red (7B–C8 to 8B–D8) with age, the colour of the margin when young clearly paler than the rest of the pileus, bluing when bruised. Pileus context 2–3 mm thick half-way to the margin, tough, yellowish-orange (4A5), unchanging when bruised. Stipe 2.5– 4.5 × 0.3– 0.8 cm, central, slightly curved, terete, dull, dry, yellowish-orange (2A6–7) with greyish-orange (5–6 B 7–8) coarse scales at first, then light yellow or reddish-yellow to brownish-orange (4A/B5–6 to 7C6) with brownish-red to reddish-dark brown (7F4–5, 8C7–8, 8F5–7) scales, sub-bulbous, with bright yellow to greyish-yellow (2A6–7 to 3A/B5–6) sparse basal mycelium that extends half-way up the stipe. Stipe context solid, tough, reddish-yellow (4A6) near the pileus then paler to light yellow (4A5) near the base, unchanging when bruised. Hymenophore lamellate; lamellae decurrent, subdistant, slightly thick, with sinuate edge, of varying lengths, 26–34 lamellae, with 4–6 different lengths of lamellullae, 4–5 mm wide half-way to margin, brownish-orange (7C7–8) with deep yellow to orange (4–5A7–8) edge, bluish-grey when looking tangentially to the surface, bluing when bruised. Odour rubbery. Taste mild with rubbery texture. Spore print olivaceous brown (4F5).

Macrochemical reactions. KOH orange-brown on pileus and stipe surface; yellowish-brown on pileus and stipe context and hymenophore. NH4OH yellowish-brown on pileus and stipe surface and hymenophore; yellowish on pileus and stipe context.

Basidiospores [218/4/2] (4.6–)4.8–5.2–5.7(–5.9) × (3.5–)3.6–4–4.3(–4.5) µm, Q = (1.15–)1.21–1.32–1.44(–1.57); from the type (SV0236) (4.6–)4.8–5.2–5.7(–5.9) × (3.5–)3.6–3.9–4.4(–4.5) µm, Q = (1.15–)1.21–1.32–1.43(–1.57), N = 80, broadly ellipsoid to subglobose, smooth under light microscope and SEM, yellowish to pale brown in water, hyaline in 5% KOH, thin-walled, inamyloid. Basidia 4-spored, (24.7–)25.3–31.1–35.8(–35.9) × (5.3–)5.3–6.6–7.5(–7.5) µm, narrowly clavate to subcylindrical, attenuated towards the base, clampless, hyaline to yellowish hyaline in water, Melzer’s reagent and 5% KOH; sterigmata up to 4.5 µm long. Cheilocystidia (37.3–)37.9–51–63.8(–64.1) × (5.3–)5.4–8.5–12.4(–13.7) µm, narrowly conical to narrowly fusiform with obtuse apex, projecting up to 25 µm, thin-walled, smooth, yellowish-hyaline in water, hyaline in 5% KOH and NH4OH, inamyloid, more or less forming a sterile edge . Pleurocystidia (46.5–)49.2–68.9–95.2(–99.3) × (9.3–)9.6–12.6–18.9(–20) µm, abundant, narrowly conical with obtuse apex, projecting up to 28 µm, thin-walled, mostly yellowish hyaline in water and hyaline in 5% KOH and NH4OH, some containing yellowish-brown to dark brown pigments in water and yellowish-pale brown in 5% KOH and NH4OH, inamyloid, arising more or less deeply in the subhymenium or from hymenophoral trama. Hymenophoral trama subregular near the pileus context becoming slightly divergent near the edge, 46–192 µm wide, widest near the pileus context then getting narrower when close to the edge, composed of clampless hyphae 2.5–7.5 µm wide, pinkish-red hyaline in water, especially at the centre of the trama, yellowish hyaline to hyaline in 5% KOH and NH4OH. Pileipellis a palisadoderm to trichoderm 71–119 µm thick, composed of slightly thick-walled, cylindrical to irregular hyphae with fine encrustation on the wall, terminal cells 12–46 × 3.5–9 µm with pointed to notched apex or sometimes truncated apex, with 6–15(–28) µm short cells at the base, hyaline or yellowish-orange hyaline to orange hyaline hyphae with scattered fine encrustation on the wall when observed in water, hyaline to yellowish hyaline in 5% KOH and NH4OH, inamyloid. Pileus context composed of slightly thick-walled, strongly interwoven hyphae, 5–8.5 µm wide, inamyloid. Stipitipellis a disrupted palisadoderm perpendicular to the stipe axis, 47–123 µm thick, composed of slightly thick-walled, cylindrical to irregular hyphae with fine encrustations on the wall, yellow to yellowish-orange, intermixed with mostly yellowish hyaline to yellowish-brown hyphae in 5% KOH and NH4OH, terminal cells 14–47 × 4–8.5 µm with variously notched apex. Caulocystidia mixed in a group with the stipitipellis hyphae, same shape and size as the pleurocystidia, dark brown in water, paler in 5% KOH and NH4OH. Stipe context composed of parallel, densely packed, 4–9.5 µm wide hyphae, hyphae wall with scattered fine encrustations when observed in water. Clamp connections not seen in any tissue.

On soil, gregarious (up to 10 basidiomata) in dipterocarp forest dominated by , , and , mixed with scattered fagaceous trees.

Currently known only from Doi Suthep-Pui National Park, Chiang Mai Province, northern Thailand.

– THAILAND, Chiang Mai Province, Meuang District, Doi Suthep-Pui National Park, , elev. 800 m, 17 May 2015, O. Raspé, OR0615B (CMUB, BKF, BR).

is characterised by the following combination of features: yellow to light orange to orange red to brownish-orange to dull red pileus; brownish-orange lamellae with deep yellow to orange edge; the colour of the lamellae appears more bluish-grey when observed from an oblique angle to the surface; pileus surface and lamellae turning blue when bruised; some pleurocystidia containing yellowish-brown to dark brown pigments in water; basidiospores that are smaller or shorter (4.6–5.9 × 3.5–4.5 µm) than the other species ( = 6.0–7.5 × 4–5.5µm; = 5.5–7 × 4.5–5.5 µm; = 6.5–11 × 4–7.5 µm; = 5.9–8 × 4.1–6 µm) (Halling et al. 1999, Montoya and Bandala 2011, Zhang and Li 2018).

Morphologically, is quite similar to in that they have similar colours in pileus and lamellae; the lamellae in both species also turn more or less blue to dark blue when bruised. and are also similar, based on some pleurocystidia containing yellowish-brown to dark brown pigments, but those features are not found in and in the two New World species (Halling et al. 1999, Montoya and Bandala 2011). However, the pleurocystidia containing brown pigments seem to be more frequent in , which also has, on average, larger basidiospores than (Zhang and Li 2018).

The pinkish-red hymenophoral trama of was not found in either or in the two American species. In our observation of the two American specimens ( voucher REH7271 and voucher Garay215), we found that the hymenophoral trama was yellowish hyaline when observed in water. The original description of does not mention the colour of the hymenophoral trama and we could not obtain a specimen to observe this character. However, other morphological characters and phylogenetic evidence are enough to differentiate from .

Our phylogenetic analyses of a four-gene dataset revealed that from Costa Rica and from Mexico clustered in the clade with high support (BS = 100% and PP = 1). Both species possess the distinctive morphological characters of , which include yellowish-orange to reddish-orange basidiomata, orange to orange brown lamellae, bright yellow basal mycelium, ovoid or ellipsoid to broadly ellipsoid basidiospores with smooth surface and subcylindrical to subfusoid to ventricose cheilocystidia and pleurocystidia (Halling et al. 1999, Montoya and Bandala 2011). Therefore, the following two new combinations are proposed:

(Halling & G.M. Muell.) Raspé & Vadthanarat comb. nov.

823607

Basionym.

Halling & G.M. Mueller, Mycotaxon 73: 64 (1999)

Specimen examined.

– COSTA RICA. Near town of Palo Verde, elev. 1600 m, 11 June 1994, Halling 7271 (NY).

(Montoya & Bandala) Raspé & Vadthanarat comb. nov.

823608

Montoya & Bandala, Mycotaxon 117: 10 (2011)

– MEXICO. Veracruz: Mpio. Acatlán, Acatlán Volcano, 29 September 2009, Garay 215 (XAL).

Discussion

Both phylogeny and morphology support the placement of the two new species from Thailand, and in the genus . Phylogenetically, both species were highly supported in the clade close to (typus generis). Morphologically, they are characterised by having yellowish-orange to reddish- to brownish-orange basidiomata with bright yellow basal mycelium and smooth, ellipsoid, broadly ellipsoid to subglobose basidiospores. The other lamellate in , and are solely similar to the new species by having a lamellate hymenophore instead of a poroid hymenophore. However, differs from species by having whitish- to yellowish-pale brown basidiomata with yellow to golden-yellow lamellae, with off-white to whitish to yellow basal mycelium and most species in the genus have basidiospores with more or less bacillate ornamentation under SEM (Neves & Halling 2010, Neves et al. 2012, Zeng et al. 2013). The single species, Singer differs from by having longitudinally ridged basidiospores (Bandala et al. 2004). The sole species of , , differs by having beige to olive-cream or olive buff lamellate to subporoid hymenophore, with anastomosing and interveined gills and basal mycelium whitish to yellowish (Farid et al. 2018). Moreover, those genera are phylogenetically distant from . (Bandala et al. 2004, Neves & Halling 2010, Neves et al. 2012, Zeng et al. 2013, Farid et al. 2018).

Interestingly, Corner, described from Singapore (Corner 1970), is similar to species, in that it produces crimson to scarlet, lamellate basidiomata with orange to orange-red lamellae and yellow basal mycelium, broadly ellipsoid to subglobose and smooth basidiospores. It probably should also be transferred to , but we refrain from doing so until specimens become available for molecular study. According to the protologue of , it differs from the newly described Asian species of by having larger basidiospores (7.5–10 × 6.5–8 µm), larger cheilocystidia (70–120 × 10–18 µm) and larger caulocystidia (up to 200 × 10–16 µm) (Corner 1970).

species formed two clades, an Asian species clade (BS = 65% and PP = 1) and a New World species clade (BS = 100% and PP = 1) (Fig. 1). The Asian one contains three species, , and , while the American clade contains the remaining two species and . and seem to be genetically very close to each other, much closer than the species in the Asian clade. Only morphological differences between the two species were used to separate them from each other. produces larger basidiospores than and pleurocystidia are somewhat thick-walled (0.8–3.5 µm thick) in , whereas they are thin-walled in and the latter has non-staining context, whereas the former has a cyanescent context. However, the descriptions were based on a limited number of collections and more samples are desirable to verify whether the morphological traits observed are good characters differentiating the two species or merely extremes of a continuum in morphological variation within a single species.

Regarding the phylogenetic affinities of , Zhang and Li (2018) reported that it was likely close to the genus G. Wu & Zhu L. Yang and G. Wu & Zhu L. Yang, based on a multilocus dataset of nrLSU, tef1, rpb1 and rpb2, although this relationship was not supported in their phylogram. In our phylogeny, based on a multilocus dataset of atp6, tef1, rpb2 and cox3, with wider taxon sampling, also clustered within the group, but was sister to with high bootstrap support (96%) but relatively weak posterior probability support (0.86). contains three species, A.C. Magnago, (Singer) T.W. Henkel and T.W. Henkel & Husbands that have some similar morphological characters to , including red-orange to red pileus and light yellow basal mycelium. The three existing species are clearly different from all known species by having a poroid, non-cyanescent hymenophore (Henkel et. al. 2016, Magnago et al. 2018). However, the hymenophore structure (lamellate vs. poroid) is not sufficient to separate genera in . currently contains both lamellate and poroid species, although some poroid species have already been transferred to another genus, (Zhu et al. 2015). Phylogenetic analyses, including the remaining poroid species, are needed to verify their taxonomic position.

putatively forms ectomycorrhizal associations with trees in family , including the genera , and (Neves and Halling 2010, Montoya and Bandala 2011, Zhang and Li 2018). The two Thai species were found in forests dominated by trees, mainly , including , and , including and . However, some and trees () were also observed in the vicinity and could also be the ectomycorrhizal partners. Further study is needed to confirm the ectomycorrhizal relationships of .

1	Growing in North or Central America	2
–	Growing in Southeast Asia or in tropical to subtropical China	3
2	Bluing of the context when exposed; basidiospores ellipsoid to oblong, obtuse, 6.5–11 × 4–7.5 µm; pleurocystidia somewhat thick-walled (0.8–3.5 µm thick)	E. fagicola
–	Context unchanging when exposed; basidiospores ovoid to subellipsoid, 6.0–7.5 × 4–5.5 µm; pleurocystidia thin-walled	E. aurantiacus
3	Yellowish-orange lamellae slightly reddening when bruised; context slowly or slightly reddening when exposed	E. paucicarpus
–	Brownish-orange or orange, deep orange, reddish-orange to orange red lamellae bluing to greyish-green when bruised; context unchanging to gradually turning dark violet, blackish to dark blue	4
4	Basidiospores 4.6–5.9 × 3.5–4.5 µm, broadly ellipsoid to subglobose; cystidia mostly hyaline, only some containing yellowish-brown to dark brown pigments.	E. suthepensis
–	Basidiospores 5.5–7 × 4.5–5.5 µm, broadly ellipsoid, ellipsoid to nearly ovoid; cystidia usually containing yellowish-brown pigments	E. cinnabarinus