Promegatherium
Promegatherium ("before "Megatherium"") is a genus of prehistoric xenarthrans that lived in Argentina, during the Late Miocene. This genus is regarded as closely related to the later, and more famous genus, "Megatherium", hence the reference in the name. The first specimens of "Promegatherium" were originally described by the biologist Florentino Ameghino in 1887. Its known species are "Promegatherium cabreri", "P. nanum", "P. parvulum", "P. remulsum", and "P. smaltatus". "P. nanum" was originally placed in the genus ""Eomegatherium"" before it was grouped together in "Promegatherium". Fossils of "Promegatherium" have been found in the Ituzaingó Formation in Argentina.