A new genus of devonian tetrapod from North-east Greenland, with new Information on the lower jaw of Ichthyostega

Clack, J. A. and Ahlberg, P. E. and Blom, H. and Finney, S. M. (2012) A new genus of devonian tetrapod from North-east Greenland, with new Information on the lower jaw of Ichthyostega. Palaeontology, 55 (1). pp. 73-86. ISSN ISSN: 0031-0239, ESSN: 1475-4983 DOI 10.1111/j.1475-4983.2011.01117.x

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Abstract

Abstract: A new genus and species of Devonian tetrapod has been identified from material collected in 1947 from the southern slope of Mt. Celsius, Ymer Ø, North-East Greenland. The specimen preserves both lower jaws, partial palate, premaxillae and maxillae, with a natural mould of parts of the shoulder girdle. The new taxon, Ymeria denticulata, shows differences in dentition, skull ornament and lateral line expression from both Acanthostega and Ichthyostega, but it shows a closer resemblance to the latter. A cladistic analysis not only suggests that Ymeria lies adjacent to Ichthyostega on the tetrapod stem, but also reveals substantial topological instability. As the third genus and the fifth species of tetrapod identified from North-East Greenland, it demonstrates the high diversity of Devonian tetrapods in that region.

Item Type: Article
Uncontrolled Keywords: 2011AREP; IA63;
Subjects: 04 - Palaeobiology
Divisions: 04 - Palaeobiology
Journal or Publication Title: Palaeontology
Volume: 55
Page Range: pp. 73-86
Identification Number: 10.1111/j.1475-4983.2011.01117.x
Depositing User: Sarah Humbert
Date Deposited: 26 Nov 2011 12:05
Last Modified: 23 Jul 2013 10:02
URI: http://eprints.esc.cam.ac.uk/id/eprint/2251

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