Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Cladus: Sarcopterygii
Cladus: Rhipidistia
Cladus: Tetrapodomorpha
Cladus: Eotetrapodiformes
Cladus: Elpistostegalia
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Cladus: Synapsida
Cladus: Eupelycosauria
Cladus: Sphenacodontia
Cladus: Sphenacodontoidea
Cladus: Therapsida
Cladus: Theriodontia
Cladus: Cynodontia
Cladus: Eucynodontia
Cladus: Probainognathia
Cladus: Prozostrodontia
Cladus: Mammaliaformes
Classis: Mammalia
Subclassis: Trechnotheria
Infraclassis: Zatheria
Supercohors: Theria
Cohors: Eutheria
Infraclassis: Placentalia
Superordo: Xenarthra
Ordo: Pilosa
Subordo: Folivora
Familia: †Megatheriidae
Subfamilia: †Megatheriinae
Tribus: †Megatheriini
Subtribus: Prepotheriina
Genus: Prepotherium
Species (3): †P. filholi – †P. moyani – †P. potens
Name
†Prepotherium Ameghino, 1891
References
Primary references
Ameghino, F. 1891. Nuevos restos de mamíferos fósiles descubiertos por Carlos Ameghino en el Eoceno inferior de la Patagonia austral. Especies nuevas, adiciones y correcciones. Revista Argentina de Historia Natural 1: 289–328.
Additional references
Ameghino, F. 1891. Caracteres diagnósticos de cincuenta especies nuevas de mamíferos fósiles argentinos. Revista Argentina de Historia Natural 1: 129–167.
Ameghino, F. 1894. Enumération synoptique des espèces de mammiféres fossiles des formations éocènes de Patagonie. Boletín de la Academia Nacional de Ciencias de Córdoba 13: 259–445.
Prepotherium is an extinct genus of megatheriid ground sloths that lived during the Miocene period. Fossils of Prepotherium have been found in the Collón Curá and Santa Cruz Formations of Argentina.[1]
Prepotherium differed from Megatherium by being smaller and having a less exaggeratedly convex inferior border of the lower jaw.[2]
Redefined species
An additional species from Venezuela, P. venezuelanum, was named by R. Collins in 1935.[3] from fossils found in the Portuguesa state and additional remains from the Acre state in Brazil.[4] However, this species was later reclassified in its own genus, Pseudoprepotherium, as a basal member of another family of ground sloths, the Mylodontidae.[5][6]
References
Prepotherium at Fossilworks.org
A History of Land Mammals in the Western Hemisphere, by William Berryman Scott
Collins, R.L., 1934. Venezuelan Tertiary Mammals. Johns Hopkins University Studies in Geology (11), 23-244.
M. A. Cozzuol. 2006. The Acre vertebrate fauna: Age, diversity, and geography. Journal of South American Earth Sciences 21:185-203
Hirschfeld SE. 1985. Ground sloths from the Friasian La Venta Fauna, with additions to the pre-Friasian Coyaima Fauna of Colombia, South America. University of California Publications, Geological Sciences 128: 1–91.
Marcelo R. Sánchez-Villagra, Orangel A. Aguilera, Alfredo A. Carlini. The fossil vertebrate record of Venezuela. In Marcelo R. Sánchez-Villagra, Orangel A. Aguilera, and Alfredo A. Carlini, Urumaco and Venezuelan Paleontology The Fossil Record of the Northern Neotropics. 2010 Publisher: Indiana University Press, p. 26
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