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Marine tethysuchian crocodyliform from the ?Aptian-Albian (Lower Cretaceous) of the Isle of Wight, UK

Marine tethysuchian crocodyliform from the ?Aptian-Albian (Lower Cretaceous) of the Isle of Wight, UK
Marine tethysuchian crocodyliform from the ?Aptian-Albian (Lower Cretaceous) of the Isle of Wight, UK
A marine tethysuchian crocodyliform from the Isle of Wight, most likely from the Upper Greensand Formation (upper Albian, Lower Cretaceous), is described. However, we cannot preclude it being from the Ferruginous Sands Formation (upper Aptian), or more remotely, the Sandrock Formation (upper Aptian-upper Albian). The specimen consists of the anterior region of the right dentary, from the tip of the dentary to the incomplete fourth alveolus. This specimen increases the known geological range of marine tethysuchians back into the late Lower Cretaceous. Although we refer it to Tethysuchia incertae sedis, there are seven anterior dentary characteristics that suggest a possible relationship with the Maastrichtian-Eocene clade Dyrosauridae. We also review ‘middle’ Cretaceous marine tethysuchians, including putative Cenomanian dyrosaurids. We conclude that there is insufficient evidence to be certain that any known Cenomanian specimen can be safely referred to Dyrosauridae, as there are some cranial similarities between basal dyrosaurids and Cenomanian–Turonian marine ‘pholidosaurids’. Future study of middle Cretaceous tethysuchians could help unlock the origins of Dyrosauridae and improve our understanding of tethysuchian macroevolutionary trends.
Dyrosauridae, Ferruginous Sands Formation, Pholidosauridae, Sandrock Formation, Tethysuchia, Upper Greensand Formation
0024-4066
854-871
Young, Mark T.
d9880973-1dd1-4b1c-81a8-7494170dbac2
Steel, Lorna
661f272f-fa0c-45bb-89a3-3036cc85c703
Foffa, Davide
a0a5e738-a340-4b36-b4c7-39e44994f22e
Price, Trevor
204cf907-3545-4f03-943b-32653615d1d7
Naish, Darren
6cd448f6-99cc-4c45-93d1-bdd24ee3d281
Tennant, Jonathan P.
9b0914cd-101d-48a7-9f6c-c9629e8a0781
Young, Mark T.
d9880973-1dd1-4b1c-81a8-7494170dbac2
Steel, Lorna
661f272f-fa0c-45bb-89a3-3036cc85c703
Foffa, Davide
a0a5e738-a340-4b36-b4c7-39e44994f22e
Price, Trevor
204cf907-3545-4f03-943b-32653615d1d7
Naish, Darren
6cd448f6-99cc-4c45-93d1-bdd24ee3d281
Tennant, Jonathan P.
9b0914cd-101d-48a7-9f6c-c9629e8a0781

Young, Mark T., Steel, Lorna, Foffa, Davide, Price, Trevor, Naish, Darren and Tennant, Jonathan P. (2014) Marine tethysuchian crocodyliform from the ?Aptian-Albian (Lower Cretaceous) of the Isle of Wight, UK. Biological Journal of the Linnean Society, 113 (3), 854-871. (doi:10.1111/bij.12387).

Record type: Article

Abstract

A marine tethysuchian crocodyliform from the Isle of Wight, most likely from the Upper Greensand Formation (upper Albian, Lower Cretaceous), is described. However, we cannot preclude it being from the Ferruginous Sands Formation (upper Aptian), or more remotely, the Sandrock Formation (upper Aptian-upper Albian). The specimen consists of the anterior region of the right dentary, from the tip of the dentary to the incomplete fourth alveolus. This specimen increases the known geological range of marine tethysuchians back into the late Lower Cretaceous. Although we refer it to Tethysuchia incertae sedis, there are seven anterior dentary characteristics that suggest a possible relationship with the Maastrichtian-Eocene clade Dyrosauridae. We also review ‘middle’ Cretaceous marine tethysuchians, including putative Cenomanian dyrosaurids. We conclude that there is insufficient evidence to be certain that any known Cenomanian specimen can be safely referred to Dyrosauridae, as there are some cranial similarities between basal dyrosaurids and Cenomanian–Turonian marine ‘pholidosaurids’. Future study of middle Cretaceous tethysuchians could help unlock the origins of Dyrosauridae and improve our understanding of tethysuchian macroevolutionary trends.

Full text not available from this repository.

More information

Published date: November 2014
Keywords: Dyrosauridae, Ferruginous Sands Formation, Pholidosauridae, Sandrock Formation, Tethysuchia, Upper Greensand Formation
Organisations: Ocean and Earth Science

Identifiers

Local EPrints ID: 370242
URI: http://eprints.soton.ac.uk/id/eprint/370242
ISSN: 0024-4066
PURE UUID: 8f018744-887a-4036-a8ad-53e1aa8ca2f3

Catalogue record

Date deposited: 20 Oct 2014 10:39
Last modified: 15 Jul 2019 21:41

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