Americobdella valdiviana is a
predator and has only
rudimentary jaws. Because of these features, it was originally classified as an
erpobdellid leech.
A. valdiviana is grey-coloured on the dorsal side with a yellowish ventral side. Whether eyes are present in this species is a matter of debate. While Philippi originally described
Americobdella valdiviana as having no eyes, other authors have indicated that eyes are indeed present. ==Diet==