New elmisaurine specimens from North America and their relationship to the Mongolian Elmisaurus rarus

• Autorzy: Funston G.F. , Currie P.J. , Burns M.E.
• Języki publikacji: EN

Abstrakty

EN

New specimens from Canada confirm the presence of elmisaurines in North America and shed light on the relationship of Leptorhynchos elegans to Mongolian forms. These specimens have hindlimb elements previously unknown from elmisaurines in the Dinosaur Park Formation, including tibiae and pedal phalanges. Metatarsal anatomy is sufficiently different to merit a generic distinction from Elmisaurus rarus, and both can be distinguished from Caenagnathus collinsi and Chirostenotes pergracilis. Differences between these taxa include body size, degree of coossification of the tarsometatarsus, and development of cruciate ridges of the metatarsal III. Histological analysis confirms that these differences are not correlated with ontogenetic age of the specimens. The results support the informal separation of caenagnathids based on metatarsal structure, and allow comments on paleobiological differences between caenagnathids and oviraptorids.

Słowa kluczowe

EN

new species; Elmisaurinae; Dinosauria; Oviraptorosauria; Caenagnathidae; Campanian; Maastrichtian; North America; relationship; Mongolia; Elmisaurus rarus

• Wydawca: -
• Czasopismo: Acta Palaeontologica Polonica
• Rocznik: 2016
• Tom: 61
• Numer: 1
• Opis fizyczny: p.159-173,fig.,ref.

Twórcy

autor

Funston G.F.

• Biological Sciences CW405, University of Alberta, Edmonton, Alberta T6G 2E9, Canada

autor

Currie P.J.

• Biological Sciences CW405, University of Alberta, Edmonton, Alberta T6G 2E9, Canada

autor

Burns M.E.

• Biological Sciences CW405, University of Alberta, Edmonton, Alberta T6G 2E9, Canada

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Identyfikatory

DOI

10.4202/app00129.2014