Description of Birabenella, a New Genus of Goblin Spiders from Argentina and Chile (Araneae: Oonopidae)
Author
Grismado, Cristian J.
text
American Museum Novitates
2010
2010-08-23
2010
3693
1
24
http://www.bioone.org/doi/abs/10.1206/3693.2
journal article
10.1206/3693.2
0003-0082
5359037
Birabenella elqui
,
new species
Figures 1
,
60–69
TYPE MATERIAL
:
Female
holotype
from
Chile
:
Coquimbo Region
:
Elqui Province
:
Cuesta Porotitos
;
29°47′ 40.1″S
;
71°17′ 31.8″W
(
WGS84
)
;
alt.
106 m
(
GPS
)
;
16.VIII.2009
; coll. C. Grismado, A. Ojanguren, J. Pizarro, and F. Alfaro. Coastal shrubby steppe, under stones. Deposited in
MHNS
(
PBI
_
OON
14993)
.
OTHER MATERIAL EXAMINED
: None.
ETYMOLOGY: The specific epithet is a noun in apposition derived from the province where this species was collected.
DIAGNOSIS: This species resembles
B. pizarroi
in lacking spines on the legs and in the texture of the cuticle of the cephalothorax (finely reticulate only at the sides of the carapace, the remaining areas smooth), but can be distinguished by the internal female genitalia with a small and irregularly shaped posterior receptaculum and longer and more sinuous anterior elements (fig. 68).
DESCRIPTION:
Female
(
holotype
): Total length 1.80. CEPHALOTHORAX: Carapace pale orange, surface of elevated portion of pars cephalica smooth, sides finely reticulate. Clypeus low, ALE separated from edge of carapace by less than their radius. Eyes: ALE largest; ALE-PLE separated by less than ALE radius. Sternum without radial furrows between coxae I–II, II–III, III–IV, surface smooth, microsculpture absent, lateral margins unmodified. Mouthparts: chelicerae anterior face unmodified, with a basal swelling. Labium subpentagonal. Female palp spines absent, with enlarged setae on tarsus. ABDOMEN: dorsum with soft portions pale light orange. Dorsal scutum absent. LEGS: pale orange. Leg spines absent. Tarsi I to IV superior claws unipectinate, but not examined in detail. Trichobothria not examined. GENITALIA: Shape similar to that of
B. pizarroi
,
but with the anterior elements longer and more sinuous, and with the posterior receptaculum reduced, irregular (fig. 68).
Male:
Unknown.
NATURAL HISTORY: As in the sympatric
B. homonota
.