Cybaeus aspenicolens Chamberlin & Ivie 1932
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 aspenicolens

description: Key to the species of the Cybaeus aspenicolens group
1. Patellar apophysis broad, blunt; peg setae dimorphic, in two groups (Figs 2, 5, 8, 11–13). Proximal arm of tegular apophysis “C”-shaped, tip strongly retrolaterally directed, uncinate (Figs 3–4, 6–7, 9–10). Atrium in a prominent epigynal concavity; atrial openings not obscured by anterior transverse epigynal ridge or hood (Figs 14, 16, 18) (aspenicolens subgroup)...... 2
- Patellar apophysis narrower, tapered; peg setae monomorphic, in single group (Figs 25, 29). Proximal arm of tegular apophysis relatively straight, not “C”-shaped, tip prolaterally directed, bifurcate (especially in retrolateral view) (Figs 26, 28, 30–33). Prominent epigynal concavity lacking; atrial openings at least partially obscured by anterior transverse ridge or hood (Figs 34–35, 38–39) (fraxineus subgroup)...................................................................... 4
2(1). Proximal arm of tegular apophysis strongly deflected dorsally, mostly hidden in ventral view (Fig. 9) and visible only in posterior view (Fig. 10). Patellar apophysis with about 30 or 40 conspicuous stout peg setae retrolaterally and approximately two dozen much smaller peg setae dorsally (Figs 8, 13). Anterior transverse ridge bordering epigynal depression absent or only weakly developed (Fig. 14). No distinct sclerotized regions on epigynum..................... coylei Bennett spec. nov.
- Proximal arm of tegular apophysis only slightly deflected dorsally and clearly visible in ventral view (Figs 3, 6). Patellar apophysis with ± two dozen conspicuous peg setae retrolaterally and ±15 small peg setae dorsally (Figs 2, 5, 11, 12). Anterior transverse epigynal ridge prominent (Figs 16, 18). Some degree of sclerotization on epigynum....................... 3
3(2). Patellar apophysis with about two dozen retrolateral peg setae and less than ten (usually four to seven) very small dorsal peg setae in a loose cluster (Figs 2, 11). Tip of proximal arm of tegular apophysis very slightly twisted (Figs 3–4). Atrial openings covered by pair of longitudinal flaps (Fig. 16). Vulval ducts often broadly contiguous along vulval midline (Figs 17, 21).............................................................................. aspenicolens Chamberlin & Ivie
- Fifteen to 20 retrolateral peg setae and usually 12 to 15 short, stout dorsal peg setae in a tight cluster (Figs 5, 12). Tip of proximal arm of tegular apophysis strongly twisted (Figs 6–7). Atrial openings usually not covered (Fig. 18). Vulval ducts usually not contiguous (Figs 19, 23–24).................................................... blasbes Chamberlin & Ivie
4(1). In ventral view, proximal arm of tegular apophysis distinctly bifurcate, ventral tip of proximal arm prominent with broad rounded surface, dorsal tip angular (Figs 26–27, 32). Vulval ducts contiguous medially from atrium to spermathecal stalks (Figs 35–37)....................................................................... fraxineus Bennett spec. nov.
- In ventral view, proximal arm of tegular apophysis not distinctly bifurcate, with an inconspicuous narrow keel ventrally and a smoothly pointed tip dorsally (Figs 30, 33). Vulval ducts contiguous only along posterior portion of copulatory ducts (Figs 39–40)............................................................................ thermydrinos Bennett
description: Published as part of Bennett, Robb, Copley, Claudia & Copley, Darren, 2021, Cybaeus (Araneae: Cybaeidae): the aspenicolens species group of the Californian clade, pp. 224-244 in Zootaxa 4926 (2) on page 226, DOI: 10.11646/zootaxa.4926.2.4, http://zenodo.org/record/4506083