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Overview of the discovery, distribution, and geological context of Simosuchus clarki (Crocodyliformes: Notosuchia) from the late cretaceous of madagascar
Authors
Gregory A. Buckley
Sophia C. Kast
+4 more
David W. Krause
Armand H. Rasoamiaramanana
Raymond R. Rogers
Joseph J.W. Sertich
Publication date
1 November 2010
Publisher
UNA Scholarly Repository
Abstract
Simosuchus clarki is a bizarre, pug-nosed notosuchian crocodyliform known only from the Upper Cretaceous (Maastrichtian) Maevarano Formation in the Mahajanga Basin of northwestern Madagascar. When originally named and described in 2000, S. clarki was based entirely on a single specimen that included a nearly complete skull and lower jaw preserved in articulation with the anterior and mid-trunk portions of the postcranial skeleton, as well as several associated elements from the posterior region. The species is now represented by three additional partial and nearly complete articulated skeletons, as well as numerous isolated elements (mostly teeth), that permit detailed description of its entire bony anatomy, the primary subject of other chapters in this volume. These specimens were discovered as part of the \u27Mahajanga Basin Project,\u27 initiated in 1993 and conducted jointly by Stony Brook University and the Université d\u27Antananarivo, in the Berivotra and Masiakakoho study areas. The best-preserved specimens of S. clarki were entombed in massive, poorly sorted, clay-rich debris flow deposits (facics 2 of the Anembalemba Member) that accumulated in channel belts in response to exceptional rainfall events. Simosuchus, along with its contemporaries in the Maevarano assemblage, lived in a strongly seasonal, semi-arid climate some 20 million years after Madagascar separated from the India/Seychelles block and became an island isolated in the Indian Ocean. © 2010 by the Society of Vertebrate Paleontology
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Last time updated on 26/11/2020