A. carahuasensis differs from A. unica in having smaller premolars, with m1 having longer talonid and wider trigonid, p3-m1 with shallower external sulci and lacking cingulae, and less curved hypolophid.[3]A. carahuasensis is known from a fragmentary mandible.[6]
Ameghino, Florentino (1901). "Notices préliminaires sur des ongulés des terrains Crétacés de Patagonie". Boletín de la Academia de Ciencias en Córdoba. 16: 349–426. OCLC123174974.