Cybaeus hummeli Bennett,

Bennett, Robb, Copley, Claudia & Copley, Darren, 2021, Cybaeus (Araneae: Cybaeidae): the consocius species group of the Californian clade, Zootaxa 4965 (3), pp. 401-436: 410-412

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Cybaeus hummeli Bennett

spec. nov.

Cybaeus hummeli Bennett  spec. nov.

Figs 18–19View FIGURES 18–19, 22–26View FIGURES 20–22View FIGURES 23–26, 84View FIGURE 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 18View FIGURES 18–19, 22View FIGURES 20–22) 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 18–19View FIGURES 18–19, 22View FIGURES 20–22) 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, 26View FIGURES 23–26) but always with convex medial septum separating pair of longitudinal atrial openings. Copulatory ducts ( Figs 24–25View FIGURES 23–26) broad, somewhat membranous. Spermathecal stalks separate ( Fig. 25View FIGURES 23–26). 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. 84View FIGURE 84). The single known male was collected in August.


Royal British Columbia Museum - Herbarium


American Museum of Natural History


California Academy of Sciences


Departamento de Geologia, Universidad de Chile


Museum of Comparative Zoology