Cybaeus blasbes Chamberlin & Ivie,

Bennett, Robb, Copley, Claudia & Copley, Darren, 2021, Cybaeus (Araneae: Cybaeidae): the aspenicolens species group of the Californian clade, Zootaxa 4926 (2), pp. 224-244: 231-233

publication ID

https://doi.org/10.11646/zootaxa.4926.2.4

publication LSID

lsid:zoobank.org:pub:FDAE3465-979C-482F-908F-D0CF4A15000E

DOI

http://doi.org/10.5281/zenodo.4534292

persistent identifier

http://treatment.plazi.org/id/676A6A74-B106-3872-F8A1-FE68FC26FEEE

treatment provided by

Plazi

scientific name

Cybaeus blasbes Chamberlin & Ivie
status

 

Cybaeus blasbes Chamberlin & Ivie 

Figs 5–7View FIGURES 5–7, 12View FIGURES 11–13, 18–19View FIGURES 14–19, 23–24View FIGURES 20–24, 41View FIGURE 41

Cybaeus blasbes Chamberlin & Ivie 1932: 22  , fig. 55. Roewer 1954: 89. Bonnet 1956: 1301. Roth 1956: 178. Roth & Brown 1986: 3. World Spider Catalog 2020

Type material. Holotype female. U.S.A.: California: Madera County, North Fork (original label “Northfolk”), no date, R. V. Chamberlin ( AMNH), examined. 

Other material examined. U.S.A.: California: Fresno, 7³ 13♀, Shaver Lake , 12.9.1959, W.J. Gertsch & V  . D. Roth ( AMNH); 1³, same locality, matured 14.9.1959, W.J. Gertsch & V  . D. Roth ( AMNH); 1³, same locality, matured 20.9.1959, W.J. Gertsch & V  . D. Roth ( CAS); 1♀, Stump Springs Road @ trail to Aspen Meadow (near Huntington Lake ), 26.8.1971, H.B. Leech ( CAS); Madera, 4³ 8♀, 2 mi. S of Fish Camp, 12.9.1959, W.J. Gertsch & V  . D. Roth ( AMNH); 3³, same locality, matured 14.9.1959 W.J. Gertsch & V  . D. Roth ( AMNH); 4♀, 5 mi. S of Fish Camp, 23.9.1961, W.J. Gertsch & W. Ivie ( CAS); 2³ 2♀ ( AMNH); 1♀, North Fork , R. V  . Chamberlin ( AMNH); 1³, same locality, matured 24.9.1958, V  . D. Roth ( CAS); 1♀, 5 mi. N of North Fork , 7.9.1958, V  . D. Roth ( CAS); 1♀, same locality, matured 10.9.1958, V  . D. Roth ( CAS); Mariposa, 1³ 1♀, Fish Camp , 5.9.1959, V  . D. Roth ( AMNH); 9³ 3♀, 1mi. S of Fish Camp , 23.9.1961, W. Ivie & W.J. Gertsch ( AMNH)  .

Diagnosis. Cybaeus blasbes  is grouped with C. aspenicolens  and C. coylei  spec. nov. in the informal aspenicolens  subgroup. Distinguishing the aspenicolens  and fraxineus  subgroups is discussed in the aspenicolens  species group diagnosis. The male of C. blasbes  is diagnosed by the large, broad, blunt patellar apophysis ( Figs 5View FIGURES 5–7, 12View FIGURES 11–13) with short, stout dorsal peg setae and a slightly concave retrolateral margin distal to the retrolateral peg setae group as well as the prominent, C-shaped proximal arm of the tegular apophysis with a relatively long and conspicuously twisted uncinate tip ( Figs 6–7View FIGURES 5–7). The female can usually be diagnosed by the well-developed atrial depression and the exposed, sclerotized atrial openings ( Fig. 18View FIGURES 14–19) and the vulval ducts usually separated along the midline ( Figs 19View FIGURES 14–19, 23–24View FIGURES 20–24). Some females may be indistinguishable morphologically from females of C. aspenicolens  . Diagnostic differences distinguishing other species of the aspenicolens  subgroup from specimens of C. blasbes  are discussed under C. aspenicolens  .

Description. Ventral tibia I macrosetae usually 2–1p–2–1p–2.

Male: (n=31). Patellar apophysis ( Figs 5View FIGURES 5–7, 12View FIGURES 11–13) large, bluntly pointed, constricted near tip with about 15 to 20 large, dentiform peg setae retrolaterally and 12 to 15 small, stout peg setae dorsally. Proximal arm of tegular apophysis ( Figs 6–7View FIGURES 5–7) large, broad, and slightly deflected dorsally; tip retrolaterally directed, uncinate, relatively elongate, and conspicuously twisted.

Measurements (n=22). CL 2.8–3.6 (3.1±0.3), CW 2.08–2.8 (2.35±0.21), SL 1.33–1.63 (1.47±0.09), SW 1.30– 1.55 (1.42±0.07).

Female: (n=35). Epigynum ( Fig. 18View FIGURES 14–19) lightly sclerotized in region of atrial openings; atrial openings exposed. Vulval ducts ( Figs 19View FIGURES 14–19, 23–24View FIGURES 20–24) usually separated along vulval midline except at anterior margin of vulva.

Measurements (n=21). CL 2.8–3.8 (3.3±0.3), CW 1.95–2.7 (2.32±0.21), SL 1.30–1.70 (1.52±0.11), SW 1.28– 1.60 (1.45±0.10). Holotype CL 3.2, CW 2.30, SL 1.49, SW 1.47.

Distribution and natural history. Western slopes of the Sierra Nevada in California in Madera, Mariposa, and Fresno Counties ( Fig. 41View FIGURE 41). Males have been collected in September.

R

Departamento de Geologia, Universidad de Chile

V

Royal British Columbia Museum - Herbarium

AMNH

American Museum of Natural History

CAS

California Academy of Sciences

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Cybaeidae

Genus

Cybaeus

Loc

Cybaeus blasbes Chamberlin & Ivie

Bennett, Robb, Copley, Claudia & Copley, Darren 2021
2021
Loc

Cybaeus blasbes

Roth, V. D. & Brown, W. L. 1986: 3
Bonnet, P. 1956: 1301
Roth, V. D. 1956: 178
Roewer, C. F. 1954: 89
Chamberlin, R. V. & Ivie, W. 1932: 22
1932