Cybaeus torosus Bennett, 2019

Bennett, Robb, Copley, Claudia & Copley, Darren, 2019, Cybaeus (Araneae: Cybaeidae): the adenes species group of the Californian clade, Zootaxa 4711 (2), pp. 245-274 : 265-268

publication ID	https://doi.org/ 10.11646/zootaxa.4711.2.2
publication LSID	lsid:zoobank.org:pub:06B09245-2722-4F4D-9076-41E68A17E8A7
DOI	https://doi.org/10.5281/zenodo.5944507
persistent identifier	https://treatment.plazi.org/id/16385323-F01A-4E2F-AFF1-B1FFAC19D152
taxon LSID	lsid:zoobank.org:act:16385323-F01A-4E2F-AFF1-B1FFAC19D152
treatment provided by	Plazi
scientific name	Cybaeus torosus Bennett
status	sp. nov.

Treatment

Cybaeus torosus Bennett View in CoL spec. nov.

Figs 54–55 View FIGURES 54–55 , 71 View FIGURE 71

Type material. Holotype ♀. U.S.A.: California: Alameda County [no other locality data], 22 March 1941, W.M. Pearce ( AMNH).

Paratypes. U.S.A.: California: Alameda. 3♀, same data as holotype .

Etymology. The specific name is from the Latin for “muscular, bulging” and refers to the resemblance of the vulva of this species in dorsal view to a muscle-flexing body-builder.

Diagnosis. The male is unknown.

The female of C. torosus is unlikely to be confused with females of other adenes group species and is distinguished by a combination of features of the atrium and the copulatory ducts. The atrium is inverted, U-shaped, and widest posteriorly ( Fig. 54 View FIGURES 54–55 ). The outer lateral margins of the copulatory ducts are clearly visible through the integument in ventral uncleared view of the epigynum ( Fig. 54 View FIGURES 54–55 ) and the ducts themselves are broad and lightly sclerotized anteriorly at their origin at the atrium and narrowed and heavily sclerotized closer to the spermathecal heads ( Fig. 55 View FIGURES 54–55 ).

Description. Abdomen very dark; femora lightly banded.

Female: (n=4). Length of atrium (from epigastric groove to anterior margin) about twice width (between lateral margins) ( Fig. 55 View FIGURES 54–55 ).

(n=4). CL 2.6–3.0 (2.9), CW 1.70–2.10 (1.93), SL 1.24–1.43 (1.35), SW 1.12–1.30 (1.25). Holotype CL 2.9, CW 1.93, SL 1.35, SW 1.29.

Distribution. Known only from the type locality in Alameda County on the east side of San Francisco Bay in west central California ( Fig. 71 View FIGURE 71 ).