Phylogeny of the Mosasaurinae Squamata: Mosasauridae with descriptions and functional morphology of new and existing mosasaurinesReportar como inadecuado

Phylogeny of the Mosasaurinae Squamata: Mosasauridae with descriptions and functional morphology of new and existing mosasaurines - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Mosasaurine, Aquatic adaptation, Cranial kinesis, Plotosaurus, Morocco

LeBlanc, Aaron

Supervisor and department: Caldwell, Michael Biological Sciences

Examining committee member and department: Acorn, John Renewable Resources Murray, Alison Biological Sciences Caldwell, Michael Biological Sciences Currie, Philip Biological Sciences

Department: Department of Biological Sciences


Date accepted: 2011-07-15T16:14:01Z

Graduation date: 2011-11

Degree: Master of Science

Degree level: Master's

Abstract: Mosasaurs were giant marine squamates that inhabited all of the world’s oceans approximately 93 to 65 Million Years Ago. The subfamily Mosasaurinae is one of the most diverse groups, including the robust-toothed Globidensini and the ichthyosaur-like members of the Plotosaurini Plotosaurus + Mosasaurus. Eremiasaurus heterodontus, a new mosasaurine from the Maastrichtian of Morocco, is described and added to a comprehensive phylogenetic analysis of the Mosasaurinae. Eremiasaurus heterodontus is recovered as the sister taxon to the Plotosaurini, but possesses features previously considered to be globidensine synapomorphies. As a result, the Globidensini may no longer be considered monophyletic. The cranial anatomy of Plotosaurus bennisoni is also redescribed to highlight a trend towards an increasing level of aquatic adaptation of the skulls of derived mosasaurines. These findings challenge the conventional dichotomy of plotosaurine and globidensine mosasaurs and the evolutionary trends within the Mosasaurinae.

Language: English

DOI: doi:10.7939-R34906

Rights: Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.

Autor: LeBlanc, Aaron



Documentos relacionados