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Proplatyarthrus Temporal range: Early Oligocene (Tinguirirican-Deseadan) ~33.9–28.4 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Talus bone of Proplatyarthrus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Pilosa
Family:	†Megalonychidae
Genus:	†Proplatyarthrus Ameghino 1905
Type species
†P. longipes Ameghino, 1905

Proplatyarthrus is an extinct genus of ground sloths of the family Megalonychidae, endemic to Chubut Province, Argentina.

Taxonomy

Proplatyarthrus was named and a talus bone described by Florentino Ameghino in 1905. It was assigned to Megalonychidae by Carroll in 1988.

References

1. "PaleoBiology Database: Proplatyarthrus, basic info". Archived from the original on 2012-10-13. Retrieved 2009-08-15.
2. Ameghino, 1905, p.59
3. R. L. Carroll. 1988. Vertebrate Paleontology and Evolution. W. H. Freeman and Company, New York 1-698

Bibliography

• Ameghino, Florentino (1905), "La faceta articular inferior única del astrágalo de algunos mamíferos no es un carácter primitivo", Anales del Museo Nacional de Buenos Aires, 12: 1–64, retrieved 2016-07-27

Further reading

• R. Hitz, M. Reguero, A. R. Wyss and J. J. Flynn. 2000. New interatheriines (Interatheriidae, Notoungulata) from the Paleogene of Central Chile and Southern Argentina. Fieldiana: Geology (New Series) 42:1-26

v t e Pilosan genera
Kingdom: Animalia Phylum: Chordata Class: Mammalia Superorder: Xenarthra
Pilosa Vermilingua †Argyromanis †Orthoarthrus Cyclopedidae Cyclopes †Palaeomyrmidon Myrmecophagidae Myrmecophaga †Neotamandua †Protamandua Tamandua Folivora †Pseudoglyptodon †Megalocnidae Acratocnus Imagocnus Megalocnus Mesocnus Miocnus Neocnus Parocnus Mylodontoidea Choloepus †Scelidotheriidae Analcitherium Catonyx Chubutherium Nematherium? Neonematherium Proscelidodon Scelidodon Scelidotheridium Scelidotheriops Scelidotherium Sibyllotherium Valgipes †Mylodontidae Baraguatherium Eionaletherium Nematherium Octodontobradys Octodontotherium Octomylodon Orophodon Paroctodontotherium Pseudoprepotherium Urumacotherium Mylodontinae Archaeomylodon Brievabradys? Glossotheriopsis Megabradys Mylodonopsis Ocnotherium Oreomylodon? Promylodon Ranculcus Strabosodon Lestodontini Bolivartherium Lestobradys Lestodon Magdalenabradys Sphenotherus Thinobadistes Mylodontini Glossotheridium Glossotherium Kiyumylodon Mylodon Paramylodon Pleurolestodon Simomylodon Megatherioidea see below↓
Megatherioidea Megatherioidea Bradypus †Hapalops †Hiskatherium †Hyperleptus †Pelecyodon †Schismotherium †Similhapalops †Megalonychidae Deseadognathus Hapalops? Hyperleptus? Mesopotamocnus Paulocnus Proplatyarthrus Urumacocnus Ortotheriinae Diodomus Eucholoeops Hapaloides Megalonychotherium Ortotherium Paranabradys Pliomorphus Proschismotherium Pseudortotherium Torcellia Megalonychinae Ahytherium Australonyx Megalonychops Megalonyx Megistonyx Meizonyx Nohochichak Pattersonocnus Pliometanastes Protomegalonyx Sinclairia Xibalbaonyx Zacatzontli †Megatheria Analcimorphus Nothrotheriidae Neohapalops Thalassocnus? Nothrotheriinae Amphibradys Aymaratherium Chasicobradys Huilabradys Lakukullus Mcdonaldocnus Mionothropus Nothropus Nothrotheriops Nothrotherium Pronothrotherium Xyophorus Megatheriidae Thalassocnus? Planopsinae Planops Prepotherium Prepoplanops Proprepotherium Megatheriinae Anisodontherium Diabolotherium Eomegatherium Eremotherium Megathericulus Megatheridium Megatheriops Megatherium Ocnopus Perezfontanatherium Plesiomegatherium Pliomegatherium Proeremotherium Promegatherium Pyramiodontherium Sibotherium Urumaquia

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• Prehistoric sloths
• Oligocene xenarthrans
• Oligocene genus extinctions
• Oligocene mammals of South America
• Deseadan
• Tinguirirican
• Paleogene Argentina
• Fossils of Argentina
• Fossil taxa described in 1905
• Taxa named by Florentino Ameghino
• Golfo San Jorge Basin
• Sarmiento Formation
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