Morphological and anatomical observations about Mariliasuchus amarali and Notosuchus terrestris (Mesoeucrocodylia), and their phylogenetical relationships with other South American notosuchians

Marco B D Andrade, RJ Bertini

Research output: Contribution to journalArticle (Academic Journal)

Abstract

The phylogenetic relationship of the notosuchians Mariliasuchus amarali (Campanian; Bauru Group) and Notosuchus terrestris (Santonian; Neuquén Group) is revised. Morpho-anatomical evaluation of Mariliasuchus in the current bibliography indicate close relationship with Notosuchus, while cladistic analysis either related Mariliasuchus to Candidodon itapecuruense (Albian/eo-Cenomanian; São Luis-Grajaú Basin), as part of the phylotaxon Candidodontidae, or to Comahuesuchus brachybuccalis (Santonian; Neuquén Group). Comparative study of specimens shows similarities on the palate, choanae, dentition, retroarticular process, and other structures from Mariliasuchus and Notosuchus, supporting the original classification as a Notosuchidae. Preliminary phylogenetic analysis sets these taxa as sister-groups. Reevaluation of a previously published phylogenetic analysis from other authors provides further support for the Mariliasuchus+Notosuchus clade. The current work indicates that Mariliasuchus is a Notosuchidae, refuting its allocation as a Candidodontidae. The influence of character construction and the definition of Notosuchia are discussed.
Translated title of the contributionMorphological and anatomical observations about Mariliasuchus amarali and Notosuchus terrestris (Mesoeucrocodylia), and their phylogenetical relationships with other South American notosuchians
Original languageEnglish
Pages (from-to)5 - 62
Number of pages57
JournalArquivos do Museu Nacional
Volume66(1)
Publication statusPublished - Aug 2008

Bibliographical note

Publisher: Museu Nacional/Universidade Federal do Rio de Janeiro

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