| Literature DB >> 25425941 |
Jose L Fernandez-Triana1, James B Whitfield2, M Alex Smith3, Winnie Hallwachs4, Daniel H Janzen5.
Abstract
The New World genus Venanus (Hymenoptera: Braconidae: Microgastrinae) is a small group of parasitoid wasps that includes two Nearctic and seven Neotropical species. Here two additional species, authored by Fernández-Triana & Whitfield, are described from Costa Rica: V.johnnyrosalesi sp. n. from Area de Conservación Guanacaste (ACG) and V.randallgarciai sp. n. from Area de Conservación Cordillera Volcanica Central. They represent the first record of the genus for Mesoamerica. A previous key to all known Venanus (Whitfield et al. 2011) is modified to include the new species. The Costa Rican species were collected at altitudes of 1,400-1,460 m, but nothing is known of their biology. DNA barcodes were obtained for both species and are included as part of the description along with extensive photos. This paper is part of a series inventorying the diversity of Microgastrinae in ACG.Entities:
Keywords: Area de Conservación Guancaste; Costa Rica; Mesoamerica; Microgastrinae; Venanus; taxonomy
Year: 2014 PMID: 25425941 PMCID: PMC4238065 DOI: 10.3897/BDJ.2.e4167
Source DB: PubMed Journal: Biodivers Data J ISSN: 1314-2828
Figure 1.. Yellow arrow shows the sculpture on metapleuron.
Figure 2.. Yellow arrow shows the sculpture on metapleuron.
Figure 3.. Yellow arrow shows the sculpture on metapleuron.
Figure 4.. Black arrows show length and width of first discal cell.
| 1 | Metasomal tergite I with slight constriction in width nearer anterior end and very long (at least 2 × as long as apically or basally broad); metasomal tergite II (raised part) rather parallel-sided and close to 2 × as long as broad; propodeum usually with median longitudinal carina pronounced in the anterior third, sometimes percurrently |
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| – | Metasomal tergite I without obvious narrowing near anterior end, either posteriorly narrowing throughout, or broadening generally and usually less than 2 × as long as broad; metasomal tergite II less than 2 × as long as broad, variably shaped; propodeum usually without obvious medial longitudinal carina, or with only a stub of one posteriorly or anteriorly | Here it continues to couplet 3 of |
| 2 | Female body length 2.8–3.0 mm; propodeum with median longitudinal carina marked throughout most of its length, strongly so on anterior 0.3; T2 length 2.5 × its central width [Colombia, Ecuador] | |
| – | Female body length at most 2.5 mm (usually less); propodeum with median longitudinally carina only slightly marked on anterior 0.3, or not clearly defined (carina not distinct among other sculpture of propodeum); T2 length less than 1.8 × its central width [Costa Rica, Ecuador] |
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| 3 | Fore wing with first discal cell width 1.0 × its height, and vein 2RS shorter than r; anterior half of propodeum mostly smooth (only with fine rugulosity medially and laterally); metasoma with most laterotergites black [Ecuador, specimens collected at or over 2,100 m] | |
| – | Fore wing with first discal cell width 1.2 × its height, and vein 2RS significantly longer than r; anterior half of of propodeum as coarsely rugose as posterior half (at most with smooth area partially on anterior 0.1–0.2 of propodeum); metasoma with most laterotergites brown [Costa Rica, specimens collected at 1,400–1,460 m] |
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| 4 | Fore wing with length of vein 2RS 1.4 × length of vein r; metapleuron coarsely sculptured on posterior 0.3 × (in addition of strong impressions on posterior margin); T2 coarsely rugose; T1 relatively less constricted than below, with T1 narrowest width (near anterior margin) 0.8 × width at posterior margin | |
| – | Fore wing with length of vein 2RS 2.0 × length of vein r; metapleuron mostly smooth (except for strong impressions on posterior margin); T2 smooth; T1 relatively more constricted than above, with T1 narrowest width (near anterior margin) 0.6 × width at posterior margin |
Both species from Costa Rica will run through couplet 2 of the key in Whitfield et al. (2011). The key below separates the new species from those mentioned in that couplet.