Rostriamynodon grangeri n. gen., n. sp. of amynodontid (Perissodactyla, Rhinocerotoidea) with comments on the phylogenetic history of Eocene Amynodontidae

Autor:	William P. Wall, Earl Manning
Rok vydání:	1986
Předmět:	Paleontology Monophyly biology Fossa Phylogenetic tree Genus Zoology Rhinoceros biology.organism_classification Inner mongolia Amynodontidae Tooth morphology
Zdroj:	Journal of Paleontology. 60:911-919
ISSN:	1937-2337 0022-3360
DOI:	10.1017/s0022336000043079
Popis:	A new genus and species of amynodontid rhinoceros, Rostriamynodon grangeri, from the early Late Eocene of Inner Mongolia, People's Republic of China, is the most primitive amynodontid recognized to date. Rostriamynodon exhibits the major diagnostic characteristics of amynodontids: quadratic M3, preorbital fossa, and loss of upper and lower P1. It differs from more advanced members of the family in its long preorbital region and lower cheek tooth morphology. Comparisons with other Eocene ceratomorphs show the crucial position Rostriamynodon has in determining phylogenetic relationships between rhinocerotoids and tapiroids. Evidence is presented for the monophyly of the Rhinocerotoidea, including amynodontids.
Databáze:	OpenAIRE
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