Sparnotheriodon
| Sparnotheriodon | |
|---|---|
| Scientific classification Edit this classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | †Litopterna |
| Family: | †Sparnotheriodontidae |
| Genus: | †Sparnotheriodon Soria, 1980 |
| Species: | †S. epsilonoides
|
| Binomial name | |
| †Sparnotheriodon epsilonoides Soria, 1980
| |
Sparnotheriodon is an extinct genus of sparnotheriodontid litoptern that lived during the Middle Eocene of what is now Argentina, leaving fossils in the Sarmiento Formation.[1]
Description
[edit ]Sparnotheriodon was a medium-sized litoptern. Sparnotheriodon, Victorlemoinea , and one species of Notiolofos , N. arquinotiensis, have been estimated to have had masses of roughly 400 kg (880 lb), whereas another species of Notiolofos, N. regueroi, was smaller, with a body mass estimated between 25 and 58 kg, making them one of the largest litopterns of the Paleogene.[2] Litopterns reached such sizes again in the Miocene.[3]
Taxonomy
[edit ]Sparnotheriodon was first named by Miguel Fernando Soria in 1980 on the basis of a mandible and teeth from the Sarmiento Formation of Argentina, with the type species being Sparnotheriodon epsilonoides.[1] In 1983, Richard Cifelli tentatively synonymized Sparnotheriodon with Victorlemoinea ,[4] while many other authors consider it distinct.[5]
References
[edit ]- ^ a b Soria, Miguel Fernando (1980). "Una nueva y problemática forma de ungulado del Casamayorense". Actas II Congreso Argentino de Paleontologeıa y Bioestratigrafeıa y I Congreso Latinoamericano de Paleontologeıa.: 193–203.
- ^ Vizcaíno, Sergio Fabián; Cassini, Guillermo; Toledo, Néstor (2012年05月01日). On the evolution of large size in mammalian herbivores of Cenozoic faunas of South America. University of Chicago Press. pp. 76–101. ISBN 978-0-226-64921-4.
- ^ Gelfo, Javier N.; López, Guillermo M.; Santillana, Sergio N. (2017). "Eocene ungulate mammals from West Antarctica: implications from their fossil record and a new species". Antarctic Science. 29 (5): 445–455. Bibcode:2017AntSc..29..445G. doi:10.1017/S0954102017000244 . eISSN 1365-2079. hdl:11336/56552 . ISSN 0954-1020. S2CID 86868504.
- ^ Cifelli, Richard L (1983年11月09日). "The Origin and Affinities of the South American Condylarthra and Early Tertiary Litopterna (Mammalia)". American Museum Novitates (2772): 1–49.
- ^ Gelfo, Javier N. (June 2016). "Considerations about the Evolutionary Stasis of Notiolofos arquinotiensis (Mammalia: Sparnotheriodontidae), Eocene of Seymour Island, Antarctica". Ameghiniana. 53 (3): 316–332. doi:10.5710/AMGH.14.09.2015.2934. hdl:11336/54582 . ISSN 0002-7014. S2CID 129877349.
