On the phylogenetic relationships of Vincelestes neuquenianus

Autor:	José F. Bonaparte
Rok vydání:	2008
Předmět:	Paleontology Gondwana biology Cladogram Laurasia Vincelestes Mammal General Agricultural and Biological Sciences Clade biology.organism_classification Cretaceous Cladistics
Zdroj:	Historical Biology. 20:81-86
ISSN:	1029-2381 0891-2963
DOI:	10.1080/08912960802164470
Popis:	This short review paper compares the lower jaw and lower dentition of the small Mesozoic mammal Vincelestes neuquenianus with some other Laurasian and Gondwanan taxa. On this basis a set of 90 characters recognised by recent authors was assembled and used to construct a cladogram. The topology suggests that the early Cretaceous mammal from Patagonia, Vincelestes, is nested within a clade comprising ‘other Gondwanan mammals’, separated from Laurasian taxa. In general, because there is a lack of Mesozoic mammal skulls from Gondwana, meaning that the skull of Vincelestes can only be compared with cranial material from Laurasia, an incomplete understanding of relationships has resulted in earlier studies. The prototribosphenic condition of Vincelestes is supported by the cladistic analysis presented here and permits a number of interesting speculations because it is of later age than Jurassic tribosphenic mammals from Gondwana. It is proposed that the tribosphenic condition may have developed first amongst ta...
Databáze:	OpenAIRE
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