''Acanthogonatus vilches'' is a
mygalomorph spider of
Chile, named after its type locality: Gil de Vilches, Talca,
Region VII (del Maule Region).
[Goloboff, Pablo A. "A revision of the South American spiders of the family Nemesiidae (Araneae, Mygalomorphae). Part 1, Species from Peru, Chile, Argentina, and Uruguay. Bulletin of the AMNH; no. 224." (1995).] Females differ from other species in the ''nahuelbuta'' group by their less modified
spermathecae.
Description
*Female: total length ;
cephalothorax
The cephalothorax, also called prosoma in some groups, is a tagma of various arthropods, comprising the head and the thorax fused together, as distinct from the abdomen behind. (The terms ''prosoma'' and ''opisthosoma'' are equivalent to ''cepha ...
length , width ; cephalic region length , width ;
fovea
Fovea () (Latin for "pit"; plural foveae ) is a term in anatomy. It refers to a pit or depression in a structure.
Human anatomy
*Fovea centralis of the retina
* Fovea buccalis or Dimple
* Fovea of the femoral head
* Trochlear fovea of the fr ...
width ; medial ocular quadrangle length , width ; labium length , width ;
sternum length , width . Its cephalic region is moderately convex, with a procurved fovea. Its labium possesses 1 cuspule. A serrula is present. Its sternal sigilla is small and oval, its sternum rebordered.
Chelicerae: rastellum is weak, with long
setae. Its
book lung
A book lung is a type of respiration organ used for atmospheric gas exchange that is present in many arachnids, such as scorpions and spiders. Each of these organs is located inside an open ventral abdominal, air-filled cavity (atrium) and conn ...
openings are wide and oval, more rounded than in other ''Acanthogonatus''. Its cephalothorax and legs are yellowish brown, while its abdomen is
mottled with a dark brown colour.
Distribution
Only in its type locality.
References
External links
*
ADW entry*
{{Taxonbar, from=Q2046398
Pycnothelidae
Spiders of South America
Spiders described in 1995
Endemic fauna of Chile