Acanthogonatus juncal is a mygalomorph spider of Argentina and Chile, named after its type locality: Juncal, Los.

Andes.

[1] A. juncal is the smallest two-clawed Acanthogonatus (most similar species: A. huaquen and A. quilocura, have a cephalothorax length of over 8 millimetres (0.31 in), compared to less than 4 millimetres (0.16 in) in A. juncal.

Juncal, Los Andes, Chile, a dry shrubland.

Specimens were collected from small burrows at stone edges.