Cybaeus sanbruno Bennett 2009,

Bennett, Robb, Copley, Claudia & Copley, Darren, 2019, Cybaeus (Araneae: Cybaeidae): the adenes species group of the Californian clade, Zootaxa 4711 (2), pp. 245-274: 262-263

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Cybaeus sanbruno Bennett 2009


Cybaeus sanbruno Bennett 2009 

Figs 44–49View FIGURES 44–46View FIGURES 47–49, 67–68View FIGURES 65–68, 70View FIGURE 70

Cybaeus sanbruno Bennett in Copley et al. 2009: 383  , Figs 54–60View FIGURES 54–55View FIGURES 56–60. World Spider Catalog 2019. Type material. Holotype ♂. U.S.A.: California: San Mateo County, San Bruno Mountain, Crystal Cave Canyon, 14 December 1980, D. Ubick (CAS), examined.

Other material examined. Specimens and locality data in Copley et al. (2009).

Diagnosis. The male of C. sanbruno  is diagnosed by a combination of features of the patellar apophysis and the proximal arm of the tegular apophysis. The patellar apophysis has 13 peg setae in an antero-dorsal cluster ( Fig. 45View FIGURES 44–46). The tip of the proximal arm of the tegular apophysis is bifid with the terminations pincer-like and convergent and there is a small but prominent, pointed dorsal keel ( Figs 44View FIGURES 44–46, 67–68View FIGURES 65–68). The males of the two other adenes  group species with a bifid tip of the proximal arm of the tegular apophysis either have the terminations divergent and an inconspicuous dorsal keel and, on the patellar apophysis, a larger number of peg setae ( C. adenes  : Figs 1–2View FIGURES 1–3, 59–60View FIGURES 56–60) or have the terminations of the proximal arm of the tegular apophysis only weakly convergent and not pincer-like and the peg setae arranged more-or-less linearly along the tip and dorsal edge of the patellar apophysis ( C. schusteri  : Figs 51View FIGURES 50–53, 65View FIGURES 65–68)

The female is distinguished by its inverted U-shaped atrium, widest posteriorly and with the posterior ends curved anteriorly (the latter feature is inconspicuous but visible in cleared epigynum using a compound microscope) ( Figs 47–48View FIGURES 47–49). In addition the very short, thick-walled, contiguous (or nearly so) copulatory ducts ( Figs 48–49View FIGURES 47–49) are diagnostic. None of the other adenes  group females have atria or copulatory ducts of this form.

Description. See Copley et al. (2009). Palpal tibia with small retrolateral ridge anteriorly, dorsal to the carinate retrolateral tibial apophysis ( Fig. 46View FIGURES 44–46).

Distribution and natural history. Known only from San Bruno Mountain, San Mateo County, in west central California ( Fig. 70View FIGURE 70). See Copley et al. (2009).














Cybaeus sanbruno Bennett 2009

Bennett, Robb, Copley, Claudia & Copley, Darren 2019

Cybaeus sanbruno Bennett in Copley et al. 2009: 383

Copley, C. R. & Bennett, R. & Perlman, S. J. 2009: 383