Elthusa nierstraszi nom. n., the replacement name for Elthusa parva (Nierstrasz, 1915), a junior secondary homonym of Elthusa parva (Richardson, 1910) (Isopoda, Cymothoidae).

The recent transfer of Elthusa parva (Richardson, 1910) from Ceratothoa created a homonymy with Elthusa parva (Nierstrasz, 1915). Elthusa parva (Richardson, 1910) has priority and Elthusa nierstraszinom. n. is proposed as the new replacement name for the junior secondary homonym Elthusa parva (Nierstrasz, 1915).

Introduction

Hadfield et al. (2016) in redescribing poorly characterised species of Dana, 1852 transferred the species (Richardson, 1910) to Schioedte & Meinert, 1884. In so doing (Nierstrasz, 1915) was rendered a junior secondary homonym.

According to Articles 23.3.5, 52 and 60.3 of the International Code of Zoological Nomenclature (Anon 1999) (Richardson, 1910) (originally in combination with Stebbing, 1893) has priority and a new name nom. n. is proposed for (Nierstrasz, 1915) to remove the homonymy.

Abbreviations. RMNH.

– Rijksmuseum voor Natuurlijke Historie (Naturalis Biodiversity Center)

Taxonomic history

: 21, fig. 20.

: Nierstrasz 1931: 132.

: Trilles 1994: 127.

: Hadfield et al. 2016: 75, fig. 12.

: 98, pl. IV, figs. 18, 19; 1931: 143.

: Bruce 1990: 287.

: Trilles 1994: 182.

Suborder

Superfamily

Family

Genus

Nierstrasz, 1915: 98–99, pl. IV, figs. 18, 19; 1931: 143.

:

:

nom. n.

Holotype.

Single ovigerous female (11 mm long; 5 mm wide), Kisser, Indonesia, coll. K. Schädler, 1898 (RMNH.CRUS.I.71).

Distribution.

Kisser (= Kisar?) Island, Moluccas, Indonesia (Nierstrasz 1915).

Hosts.

Unknown.

Etymology.

The new name honours the original author Hugo Frederik Nierstrasz (1872–1937).

Remarks.

nom. n. replaces the name (Nierstrasz, 1915), originally Nierstrasz, 1915. nom. n. has mesially directed, narrow anterolateral margins on pereonite 1; pereonite 7 not overlapping pleonite 1; pleonites all subequal in width and narrower than the pereon; and the posterior margin of the pleotelson forms a caudomedial point.

The cover date for Trilles’ (1994) ‘’ was 1991, but the work was most likely completed prior to that of Bruce (1990) and Trilles was simply retaining in its original combination (albeit using the alternative incorrect spelling ; see Anon 1996). Prior to Bruce (1990) the name (also as ) was largely used in the sense of , and there is no possibility that Nierstrasz’s species would remain in or be returned to , a strictly New World genus.