Acanthogonatus chilechico is a mygalomorph spider of Chile, its name arising from its type locality: Chile Chico, General Carrera, Region XI (de Aysén), Chile.

[1] This species is most similar to A. notatus, but is distinguished by a less developed embolar flange and by having the basal portion of the bulb narrower in lateral view, and the presence of more numerous spines on its metatarsus I.

It is known to habitate only in the type locality.