Cybaeus hummeli Bennett & Copley & Copley 2021, spec. nov.
Creators: name: Bennett, Robb
name: Copley, Claudia
name: Copley, Darren
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Cybaeidae
Cybaeus
Cybaeus hummeli

description: Cybaeus hummeli Bennett spec. nov.
Figs 18–19, 22–26, 84
Type material. U.S.A.: California: Holotype female, San Mateo County, Miramar, 5.xii.1953, V. D. Roth (AMNH). Paratypes: San Joaquin. 1♀, 10 mi. S of Byron on J4, 29.ix.1974, M. L.S., (CAS); San Mateo. 1♀, no locality, no date, J.C. Chamberlin (AMNH); 3♀, Edgewood Park, 2.i.1987, D. Ubick (CAS); 1♀, NE of Edgewood Park, 16.iv.1992, D. Ubick (CAS); Half Moon Bay Rd, 0.5 mi. W of State Hwy #5, 8.xii.1963, P. R. Craig, D.L. Craig (CAS); 8♀, Miramar, 5.xii.1953, V. D. Roth (AMNH); 2♀, Pacifica, 25.ix.1963, J. Ivie & W. Ivie (AMNH); 1♀, Redwood City, 2.i.1983, D. Ubick (CAS); 1♀, 4 mi. W San Mateo, Hwy. 5, 18.iv.1954, E.E. Gilbert & R. O. Schuster (AMNH); 1♂ Skyline Blvd. at King’s Mtn., 18.viii.1928, J.C. Chamberlin AMNH); San Francisco. 1♀, San Francisco, no date, Marx (MCZ).
Notes. The male and females described here are paired on the basis of locality data. It is possible the sexes matched here are not conspecific.
Etymology. The specific name is a patronym honoring Mark Hummel, a world-renowned harmonicist who lives in the San Francisco Bay area; name in the genitive case.
Diagnosis. The unique form of the proximal arm of its tegular apophysis (Figs 18, 22) makes the male of C. hummeli spec. nov. unlikely to be confused with any of the other species in the consocius group: in ventral view the proximal arm is broad, somewhat spatulate, with a well-developed longitudinal concave area terminating in a small acuminate tip. The female of C. hummeli spec. nov. is only likely to be confused with the females of C. consocius or C. hesper; distinguishing the females of these three species is discussed under C. consocius.
Description. Ventral tibia I macrosetae: 2-1p-2-1p-0(or 1p).
Male: (n=1). Male missing entire right palpus and patella and part of tibia of left palpus rendering description of the patellar and retrolateral tibial apophyses impossible. Proximal arm of tegular apophysis (Figs 18–19, 22) with rounded keels ventrally on anterior and posterior margins. Measurements (n=1). CL 2.20, CW 1.65, SL 1.13, SW 1.07.
Female: (n=19). Atrium of variable morphology (Figs 23, 26) but always with convex medial septum separating pair of longitudinal atrial openings. Copulatory ducts (Figs 24–25) broad, somewhat membranous. Spermathecal stalks separate (Fig. 25). Measurements (n=12). CL 1.78–2.9 (2.4±0.3), CW 1.20–2.05 (1.62±0.24), SL 0.96–1.45 (1.20±0.14), SW 0.87–1.33 (1.11±0.13). Holotype CL 2.33, CW 1.58, SL 1.20, SW 1.09.
Distribution and natural history. Restricted to San Francisco and northern San Mateo County in the mid and northern San Francisco Peninsula area, California with an outlier in San Joaquin County about 70 kilometers east of San Francisco Bay (Fig. 84). The single known male was collected in August.
description: Published as part of Bennett, Robb, Copley, Claudia & Copley, Darren, 2021, Cybaeus (Araneae: Cybaeidae): the consocius species group of the Californian clade, pp. 401-436 in Zootaxa 4965 (3) on pages 410-412, DOI: 10.11646/zootaxa.4965.3.1, http://zenodo.org/record/4752531