PaleoDB taxon number: 173481
Alternative combinations: Eretiscus tonni, Microdytes tonnii
Full reference: G. G. Simpson. 1981. Notes on some fossil penguins, including a new genus from Patagonia. Ameghiniana 18(3-4):266-272
Sister taxa: none
Type specimen: MDLP 81-VI-26-1, a set of postcrania (tarsometatarsus). Its type locality is South of Lake Colhue-Huapi (Colhuehuapian), which is in a Colhuehuapian marine horizon in the Patagonia Formation of Argentina.
Ecology: ground dwelling carnivore