Header

UZH-Logo

Maintenance Infos

A reassessment of the morphology and taxonomic status of 'Crocodylus'depressifrons Blainville, 1855 (Crocodylia, Crocodyloidea) based on the Early Eocene remains from Belgium


Delfino, M; Smith, T (2009). A reassessment of the morphology and taxonomic status of 'Crocodylus'depressifrons Blainville, 1855 (Crocodylia, Crocodyloidea) based on the Early Eocene remains from Belgium. Zoological journal of the Linnean Society, 156:140-167.

Abstract

The name Crocodilus depressifrons appears in the literature as the caption of a table, published by Blainville in 1855, depicting crocodylian remains from France. Although a proper diagnosis and description have never been published, this species has been frequently used to identify some European Eocene crocodyloids with a generalized, not elongated, rostrum. In the last 50 years, C. depressifrons has been often referred to the genus Asiatosuchus. This genus, erected by Mook in 1940 on the basis of fossil remains from the Middle Eocene of Mongolia, actually contains a rich and apparently nonmonophyletic assemblage of Palaeogene crocodyloids. In order to help clarify the morphology and the relationships of the Asiatosuchus-like taxa, it is here described a rich collection of crocodyloid remains, including skulls and a nearly complete skeleton, from four different Early Eocene localities of the Belgian Tienen Formation: Dormaal, Erquelinnes, Leval, and Orp-le-Grand. All these remains belong to one single taxon which clearly represents the long known but never properly described 'C.'depressifrons. They allow, for the first time, the diagnosis this species on the basis of an unequivocal set of characters, contributing to the long awaited revision of the Asiatosuchus-like taxa.

Abstract

The name Crocodilus depressifrons appears in the literature as the caption of a table, published by Blainville in 1855, depicting crocodylian remains from France. Although a proper diagnosis and description have never been published, this species has been frequently used to identify some European Eocene crocodyloids with a generalized, not elongated, rostrum. In the last 50 years, C. depressifrons has been often referred to the genus Asiatosuchus. This genus, erected by Mook in 1940 on the basis of fossil remains from the Middle Eocene of Mongolia, actually contains a rich and apparently nonmonophyletic assemblage of Palaeogene crocodyloids. In order to help clarify the morphology and the relationships of the Asiatosuchus-like taxa, it is here described a rich collection of crocodyloid remains, including skulls and a nearly complete skeleton, from four different Early Eocene localities of the Belgian Tienen Formation: Dormaal, Erquelinnes, Leval, and Orp-le-Grand. All these remains belong to one single taxon which clearly represents the long known but never properly described 'C.'depressifrons. They allow, for the first time, the diagnosis this species on the basis of an unequivocal set of characters, contributing to the long awaited revision of the Asiatosuchus-like taxa.

Statistics

Citations

15 citations in Web of Science®
15 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

0 downloads since deposited on 15 Dec 2009
0 downloads since 12 months

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Paleontological Institute and Museum
Dewey Decimal Classification:560 Fossils & prehistoric life
Uncontrolled Keywords:Asiatosuchus • crocodyloid evolution • Dormaal fauna • Erquelinnes • Leval • Orp-le-Grand • MP 7 • Tienen Formation
Language:English
Date:2009
Deposited On:15 Dec 2009 14:40
Last Modified:05 Apr 2016 13:39
Publisher:Wiley-Blackwell
ISSN:0024-4082
Publisher DOI:https://doi.org/10.1111/j.1096-3642.2008.00478.x

Download