Marsupials from the Late Cretaceous of Uzbekistan

• Autorzy: Averianov A , Kielan-Jaworowska Z
• Języki publikacji: EN

Abstrakty

EN

A fragment of dentary with m4, showing characters of some Late Cretaceous North American marsupials, is assigned to Marsasia sp. Marsasia Nessov, 1997 from the Coniacian of Uzbekistan, represented by M. aenigma known from edentulous dentaries with inflected angular processes, was attributed by Nessov to ?Marsupialia. Marsasia sp., found in the same horizon as the type species, resembles it in size and structure of the masseteric fossa, but dffiers in having a less steep coronoid process. We assign Marsasia to Marsupialia on the basis of the following characters: inflected angular process, shape of the dentary similar to that in Asiatherium, postcanine dental formula, inferred from alveoli for p1-3, ml-4, and sfructure of m4 more similar to Cretaceous marsupials than eutherians. The phylogenetic position of Marsasia may be between the Albian Kokopellia and Campanian Asiatherium. Marsasia is tentatively referred to the orderAsiadelphia, which may represent an endemic Asian marsupial clade.

Słowa kluczowe

EN

dentary fragment; Cretaceous; Late Cretaceous; Uzbekistan; Marsasia; Marsasia aenigma; Asiadelphia; marsupial; paleontology; paleobiogeography

• Wydawca: -
• Czasopismo: Acta Palaeontologica Polonica
• Rocznik: 1999
• Tom: 44
• Numer: 1
• Opis fizyczny: p.71-81,fig.

Twórcy

autor

Averianov A

• Russian Academy of Sciences, Universitetskaya nab.1, 199034 Saint Petersburg, Russia

autor

Kielan-Jaworowska Z

• Instytut Paleobiologii PAN, ul. Twarda 51/55, PL-00-818 Warszawa, Poland

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