Cybaeus torosus Bennett,

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

persistent identifier

http://treatment.plazi.org/id/2F5B4D33-706B-FFB4-B289-4417FDC4FE01

treatment provided by

Plazi

scientific name

Cybaeus torosus Bennett
status

spec. nov.

Cybaeus torosus Bennett  spec. nov.

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

AMNH

American Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Cybaeidae

Genus

Cybaeus