Cybaeus (Araneae: Cybaeidae): the aspenicolens species group of the Californian clade
Author
Bennett, Robb
0000-0002-6587-7079
ennett@shaw.ca
Author
Copley, Claudia
0000-0002-8184-5819
ccopley @ royalbcmuseum. bc. ca; https: // orcid. org / 0000 - 0002 - 8184 - 5819
ccopley@royalbcmuseum.bc.ca
Author
Copley, Darren
0000-0002-1944-4272
dcopley @ royalbcmuseum. bc. ca; https: // orcid. org / 0000 - 0002 - 1944 - 4272
dcopley@royalbcmuseum.bc.ca
text
Zootaxa
2021
2021-02-05
4926
2
224
244
journal article
8299
10.11646/zootaxa.4926.2.4
506621bb-94d9-468a-b3c2-46035b28b1a8
1175-5326
4506083
FDAE3465-979C-482F-908F-D0CF4A15000E
Cybaeus blasbes
Chamberlin & Ivie
Figs 5–7
,
12
,
18–19
,
23–24
,
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 5
,
12
) 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 6–7
). The female can usually be diagnosed by the well-developed atrial depression and the exposed, sclerotized atrial openings (
Fig. 18
) and the vulval ducts usually separated along the midline (
Figs 19
,
23–24
). 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 5
,
12
) 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 6–7
) 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).
FIGURES 14–19.
Cybaeus
spp., females, copulatory organ (14–15
C. coylei
spec. nov.
from Pinecrest, California. 16–17
C. aspenicolens
from Aspen Valley, California. 18–19
C. blasbes
from North Fork, California). 14, 16, 18 epigynum, ventral; 15, 17, 19 vulva, dorsal. AO—atrial opening, BG—Bennett’s gland, BS—base of spermatheca, CD—copulatory duct, HS—head of spermatheca, SS—stalk of spermatheca.
Female
: (n=35). Epigynum (
Fig. 18
) lightly sclerotized in region of atrial openings; atrial openings exposed. Vulval ducts (
Figs 19
,
23–24
) 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. 41
). Males have been collected in September.