Acanthogonatus confusus is a mygalomorph spider of Argentina and Chile, its name referring to the confusion between this species and A. subcalpeianus. Males are recognized by their long palpi, together with the absence of a tibial apophysis; females are recognized by the spermathecae (similar to A. fuegianus, A. centralis and A. parana, which have - unlike A. Confusus - no inferior tarsal claws on tarsus IV).