Eutittha insulana Thorell 1878, comb. nov.
Creators: name: Esyunin, Sergei L.
name: Zamani, Alireza
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Cheiracanthiidae
Eutittha
Eutittha insulana

description: <i>Eutittha insulana</i> Thorell, 1878, comb. nov. Figs 1a–c, 2b <i>Eutittha insulana</i> Thorell, 1878, p. 179 (description of lectotype <i>&amp;female;</i> and paralectotype juvenile <i>&amp;female;</i> (both designated here) from INDONESIA: Maluku Islands: Ambon Island (03°38 <i>ʹ</i> 17 <i>″</i> S, 128°07 <i>ʹ</i> 02 <i>″</i> E); O. Beccari leg. 1872–1877). Simon 1897, p. 87 (formal transfer to <i>Cheiracanthium</i>, here rejected.) <i>Comments</i> <i>Eutittha insulana</i> is the type of the genus. In the taxonomic remarks for ‘ <i>Cheiracanthium insulanum</i> ’, Deeleman-Reinhold (2001, p. 231) noted that ‘the specimens from West Thailand agree fully with those from the Moluccas [= Maluku Islands – type locality of <i>E. insulana</i>], and appear to be conspecific’. Our study of the syntypes of <i>E. insulana</i> (deposited in MCSNG) revealed that this statement is erroneous. The female lectotype of <i>E. insulana</i> significantly differs from the females described by Deeleman-Reinhold under <i>C. insu /anum</i> (see comments on <i>C. adjacensoides</i> Song, Chen &amp; Hou, 1990 for details). Thus, currently, this species is reliably known only by one female and one immature female, originally described from Ambon Island, Indonesia (Thorell 1878). The female of <i>E. insulana</i> is very close to that of <i>E. marplesi</i>, described from New Guinea, by the structure of the epigyne. Both species are characterised by epigyne with transverse atrium and two ventrally visible loops of copulatory ducts (Figures 1 (b)). However, <i>E. insulana</i> is 2 times smaller than <i>E. marplesi</i> (but carapace of <i>E. insulana</i> is 1.6 times shorter than that of <i>E. marplesi</i>) and appears to have a different colour: carapace and chelicerae appear to be solid yellowish brown (Figure 1 (a); dark yellow or brick after Thorell (1878)) in <i>E. insulana</i>, while carapace is two-toned in <i>E. marplesi</i>: the thoracic part of carapace yellow, the cephalic part and chelicerae orange (Chrysanthus 1967).
description: Published as part of <i>Esyunin, Sergei L. &amp; Zamani, Alireza, 2020, ' Conundrum of esoterica': on the long-forgotten genus Eutittha Thorell, 1878, with new taxonomic considerations in Cheiracanthium C. L. Koch, 1839 (Araneae: Cheiracanthiidae), pp. 1293-1323 in Journal of Natural History (J. Nat. Hist.) (J. Nat. Hist.) 54 (19 - 20)</i> on pages 1299-1300, DOI: 10.1080/00222933.2020.1781950, http://zenodo.org/record/5028442
description: {"references": ["Thorell T. 1878. Studi sui ragni Malesi e Papuani. II. Ragni di Amboina raccolti Prof. O. Beccari. Anal Museo Civico Storia Nat Genova. 13: 1 - 317.", "Simon E. 1897. Histoire naturelle des araignees. Deuxieme edition, tome second. Roret Paris; p. 1 - 192.", "Deeleman-Reinhold CL. 2001. Forest spiders of South East Asia: with a revision of the sac and ground spiders (Araneae: Clubionidae, Corinnidae, Liocranidae, Gnaphosidae, Prodidomidae and Trochanterriidae [sic]). Brill Leiden: Koninklijke Brill NV; p. 591.", "Song DX, Chen XE, Hou JW. 1990. A new species of the genus Chiracanthium from China (Araneae: Clubionidae). Acta Zootaxonomica Sin. 15: 427 - 430.", "Chrysanthus P. 1967. Spiders from south New Guinea VIII. Nova Guinea, Zool. 37: 401 - 426."]}