Trigonostylops

Trigonostylops
Temporal range: Late Paleocene–Early Eocene
Trigonostylops
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Superorder: Meridiungulata
Order: Astrapotheria
Family: Trigonostylopidae
Genus: Trigonostylops
Ameghino 1897
Type species
Trigonostylops wortmani
Ameghino, 1897

Trigonostylops is an extinct genus of South American meridiungulatan ungulate, from the late Paleocene to early Eocene of Argentina.

A complete skull of the type species, T. wortmani, has been found, and it has been classified as an astrapothere based on its large lower tusks. In comparison with the later Astrapotherium magnum, it is estimated to have been around 1.50 m (5 ft) long.[1] Teeth, primarily molars, have been found and assigned to other species.

Phylogeny

Cladogram based in the phylogenetic analysis published by Vallejo-Pareja et al., 2015, showing the position of Trigonostylops:[2]


Eoastrapostylops




Trigonostylops




Tetragonostylops




Albertogaudrya




Scaglia




Astraponotus




Maddenia




Comahuetherium




Parastrapotherium



Astrapotheriinae


Astrapotherium



Astrapothericulus



Uruguaytheriinae


Uruguaytherium





Hilarcotherium



Xenastrapotherium




Granastrapotherium













References

  1. Palmer, D., ed. (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 249. ISBN 1-84028-152-9.
  2. Vallejo-Pareja, M. C.; Carrillo, J. D.; Moreno-Bernal, J. W.; Pardo-Jaramillo, M.; Rodriguez-Gonzalez, D. F.; Muñoz-Duran, J. (2015). "Hilarcotherium castanedaii, gen. et sp. nov., a new Miocene astrapothere (Mammalia, Astrapotheriidae) from the Upper Magdalena Valley, Colombia". Journal of Vertebrate Paleontology. 35 (2): e903960. doi:10.1080/02724634.2014.903960. (Subscription required (help)).
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.