Proplatyarthrus

Proplatyarthrus is an extinct genus of ground sloths of the family Megalonychidae, endemic to Chubut Province, Argentina in South America.[1]

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
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Superorder:	Xenarthra
Order:	Pilosa
Family:	Megalonychidae
Genus:	†Proplatyarthrus Ameghino 1905
Species
P. longipes

Taxonomy

Proplatyarthrus was named and a talus bone described by Florentino Ameghino in 1905.[2] It was assigned to Megalonychidae by Carroll in 1988.[3]

Sister genera

Acratocnus, Ahytherium (syn. Iporangabradyx, Iporangabradyx collecti), Analcimorphus, Choloepus, Diheterocnus, Hyperleptus, Megalocnus, Megalonychops, Megalonychotherium, Megalonyx (syn. Morotherium), Meizonyx, Mesocnus, Microcnus, Miocnus, Pliometanastes.

References

1. PaleoBiology Database: Proplatyarthrus, basic info
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. Accessed 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