A revision of the tracheline sac spider genus Cetonana Strand, 1929 in the Afrotropical Region, with descriptions of two new genera (Araneae Corinnidae)
Author
Lyle, Robin
Author
Haddad, Charles R.
text
African Invertebrates
2010
2010-12-31
51
2
321
321
http://www.bioone.org/doi/abs/10.5733/afin.051.0206
journal article
10.5733/afin.051.0206
2305-2562
7913561
Afroceto bulla
sp. n.
Figs 6
,
54
Etymology: From Latin
bulla
(a bubble); refers to the bubbleshaped ST II.
Diagnosis: This species can be recognised by the bubbleshaped ST II and the ducts linking the spermathecae, which converge at a 45° angle to the epigastric fold (
Fig. 54
). Male unknown.
Description:
Female.
Measurements: CL 2.90, CW 2.30, AL 3.80, AW 2.20, TL 6.70, FL 0.23, SL 1.80, SW 1.48, AME–AME 0.10, AME–ALE 0.30, ALE–ALE 0.30, PME–PME 0.20, PME–PLE 0.53, PLE–PLE 0.90. Length of leg segments (sequence from femur to tarsus, and total): I 2.50+1.78+2.35+2.03+1.18=9.84; II 2.48+1.40+2.08+1.65+1.05=8.66; III 2.90+1.50+ 2.70+2.90+1.10=11.10; IV 2.18+1.20+1.68+1.55+0.80=7.41.
Carapace orange to light brown posteriorly (
Fig. 6
); first two-thirds of carapace even and high, last third with relatively steep decline; fovea short, distinct, at two thirds CL. Ocular region light brown with dark rings around eyes; AER nearly straight, slightly procurved, ALE slightly larger than AME; clypeus height 0.8 AME diameter; AME separated by distance slightly less than their diameter; AME separated from ALE by approximately 0.3 ALE diameter; PER slightly recurved, ALE larger than AME; PME separated by distance equal to 1.4 their diameter; PME separated from PLE by twice PME diameter. Chelicerae dark brown, paler towards fang base; anterior surface covered in long scattered setae, denser toward fang base; fangs appear longer than other species, bright orange in colour; two promarginal teeth, equal in size; two retromarginal teeth, proximal tooth largest. Sternum pale yellow, orange near border; surface covered in long, fine setae. Abdomen creamy yellow dorsally, mottled with dark brown, with grey chevron markings; abdomen broader anteriorly, tapering posteriorly; surface covered in fine, light setae; venter cream. Legs I to IV uniform yellow to orange, with irregular leg spines. Leg spination: femora: I
pl
3, II
pl
1, III
pl
1
do
2
rl
1, IV
do
1
rl
1; patellae spineless; tibiae: II
pl
2
rl
2
plv
2
rlv
2
vt
2, III
pl
2
rl
2
plv
2
rlv
2
vt
2; metatarsi: II
pl
1
rl
3
plv
3
rlv
2, III
pl
3
rl
2
plv
3
rlv
3. Epigyne weakly sclerotised; ducts linking spermathecae at 45° angle to epigastric fold; extending into small triangular ST I; ST II large, globular (
Fig. 54
).
Fig. 55. The distribution of
Afroceto
bulla
sp. n.
and
A. bisulca
sp. n.
in South Africa.
Holotype
:
♀
SOUTH AFRICA
:
Eastern Cape
:
East London
[
33.0°S
:
27.9°E
],
v.1916
,
Rattray
(
AMG
).
Distribution: Known only from the
type
locality (
Fig. 55
).