Cybaeus pearcei 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: 256-259

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/2F5B4D33-7074-FFAD-B289-4749FEBBFD21

treatment provided by

Plazi

scientific name

Cybaeus pearcei Bennett
status

spec. nov.

Cybaeus pearcei Bennett  spec. nov.

Figs 33–34View FIGURES 33–34, 71View FIGURE 71

Type material. Holotype ♀. U.S.A.: California: Alameda County, Calaveras Dam , 15 March 1939, W.M. Pearce ( AMNH). 

Etymology. The specific epithet is a patronym honoring W.M. Pearce, the collector of the only known specimen of this species.

Diagnosis. The female of C. pearcei  is characterized by its small atrium ( Figs 33–34View FIGURES 33–34): strongly concave and inverted U–shaped with inconspicuous relatively narrowly separated parallel lateral margins and length (from epigastric groove to anterior margin) 2.5–3.0 times width (between lateral margins). Other females of the adenes  group that possess strongly concave inverted atria have the margins farther apart and not usually parallel and length to width ratios of 1.2–2.0 ( C. adenes  : Figs 4View FIGURES 4–8, 9View FIGURES 9–11; C. amicus  : Figs 15–16View FIGURES 15–17; C. grizzlyi  : Fig. 30View FIGURES 28–30; C. sanbruno  : Figs 47–48View FIGURES 47–49; C. schusteri  : Fig. 53View FIGURES 50–53; C. torosus  : Fig. 54View FIGURES 54–55). The male is unknown.

Description. Femora unbanded.

Female: (n=1). Copulatory ducts ( Fig. 34View FIGURES 33–34) attached to anterolateral margins of atrium, nearly contiguous anteriorly; Bennett’s glands small and inconspicuous although possibly the specimen is newly matured and the glands are not fully developed (see Bennett 2006).

Holotype CL 2.00, CW 1.38, SL 1.03, SW 0.98.

Distribution. Known only from the type locality near the southern boundary of Alameda County 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