Acanthogonatus confusus is a mygalomorph spider of Argentina and Chile, its name referring to the confusion between this species and A.

[1] 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).

Forests in southern Chile (Regions VIII-X) and adjacent Neuquen Province (Argentina).

Adults were found under stones and logs, where they construct a silk tube and a shallow burrow.

At Contulmo and Pata de Gallina juveniles were collected in moss or loose soil.