Onocolus ankeri

Teixeira, Renato Augusto & Machado, Miguel, 2019, On Neotropical crab spiders: description of a new species of Onocolus (Araneae: Thomisidae), Zootaxa 4657 (1), pp. 188-190: 188

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Onocolus ankeri

sp. nov.

Onocolus ankeri  sp. nov. ( Fig. 1View FIGURE 1 A–F)

[zoobank: urn:lsid:zoobank.org:act:126D850C-80CB-452A-A5A2-AA4D7304E657 ]

Type material: Holotype: BRAZIL: Pará: Melgaço, Castanhal do Jacaré , 1°44’13.5”S, 51°25’32.8”W, 1 female, 15 April 1997, J.A.P. Barreiros ( MPEG 35307View Materials).GoogleMaps 

Paratypes: BRAZIL: Roraima: Alto Alegre, Aldeia Budu , 3°12’09”N, 63°23’30”W, 1 female, 20 July to 05 August 2009, C. Kirsh ( IBSPAbout IBSP 151198)GoogleMaps  . COLOMBIA: Caquetá: Solano (Parque Nacional Chiribiquete), 0°44’44,80”N, 72°44’17”W, 1 female, 25 June 2000, F. Quevedo ( ICN-AR 8979)GoogleMaps  .

Etymology. The epithet is an homage to Dr. Arthur Anker, who kindly provided us with photos of a live specimen. The name was chosen through a popular survey proposed by the Museu de Ciências e Tecnologia da Pontifícia Universidade Católica do Rio Grande do Sul ( MCTP—PUCRS) to promote science popularization.

Diagnosis. Females of O. ankeri  sp. nov. show the characteristic green body coloration as other females of the genus ( Figs 1A – BView FIGURE 1, live specimens) and resemble those of O. simoni Mello-Leitão  in the shape and disposition of the copulatory ducts, with wide anterior curves forming a pair of primary spermathecae ( Fig. 1FView FIGURE 1). However, the new species is distinct from all its congeners by presenting an accentuated curvature on its anterior tibiae (I and II) and three robust pairs of lateral projections on the opisthosoma ( Figs 1A, 1CView FIGURE 1). Also, O. ankeri  sp. nov. presents diagnostic setiferous tubercles on the median area of the prosoma, which are black pigmented and remarkably contrasting with the green background of the tegument ( Figs 1A, 1C, 1DView FIGURE 1).

Description (Holotype). Anterior eye row recurved, posterior eye row slightly procurved; prosoma whitish-green with darker green spots radially disposed on the prosomal ridges ( Figs 1View FIGURE 1 A–D). Legs with same coloration as prosoma; anterior femora robust, with median black spot on the mesial surface (well developed on femora I and smaller on femora


Instituto Biologico de Sao Paulo