Acanthogonatus recinto

Acanthogonatus recinto is a mygalomorph spider of Chile, its name arising from its type locality: Recinto, Nuble, Region VIII, Chile. Females are distinguished from those of A. franki by the spermathecae, having a more rounded and differentiated fundus and its basal portion extended internally, compared to those of A. peniasco with a narrower, longer and less sclerotized ducts; and from other species in the genus by having 1-1-1 P spines on its patella IV. Males differ from those of A.franki in the unique winglike projection at the base of the embolus.

Description

 * Male: total length 12.95 mm; cephalothorax length 5.80 mm, width 4.90 mm; cephalic region length 3.70 mm, width 3.05 mm; medial ocular quadrangle length (OQ) 0.52 mm, width 1 mm; labium length 0.42 mm, width 0.85 mm; sternum length 2.92 mm, width 2.32 mm. Its labium possesses 3 cuspules. A well-developed serrula is present; its teeth are widely spaced. Its sternal sigilla is small, oval and shallow; its sternum is rebordered. Chelicerae: rastellum is weak. A small, ventrally protruding cheliceral tumescence is present. Its leg I and tibia are cylindrical and straight, with no apophysis; its metatarsus is also straight. Its cephalothorax, legs, and palpi are a reddish-brown colour, while its abdomen is a light yellowish brown, with numerous dorsal mottles and a darker chevron.
 * Female: total length 19.2 mm; cephalothorax length 6.9 mm, width 5.5 mm; cephalic region length 4.45 mm, width 3.7 mm; fovea width 0.7 mm; (OQ) 0.62 mm, width 1.14 mm; labium length 0.70 mm, width 1.17 mm; sternum length 3.52 mm, width 3.07 mm. Its cephalic region is of medium convexity; its fovea shaped straight to procurved, with a small posterior notch. Its labium possesses 4 cuspules. A well-developed serrula is present. Its sternal sigilla is small, oval and shallow; its sternum is rebordered. Chelicerae: rastellum is weak. Color similar to male.

Distribution
It is found in only a few localities in Regions VIII and IX in Chile.