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A new specimen of the fossil Palaeognath Lithornis from the earliest Palaeogene of Denmark

Record type: Article

Palaeognathous birds (Aves, Palaeognathae) are uncontroversially the most basal clade among modern birds (Neornithes), having been defined for more than 100 years on the basis of their palatal morphology. However, because many fossil specimens that have been described to date lack detailed skull material (especially in association with postcrania), aspects of the early evolutionary history of these birds remain unclear, and their relationships on the basis of anatomical characters are as yet unresolved. In this paper we present a new and exceptionally well-preserved specimen of the Lower Eocene fossil palaeognath Lithornis that has a remarkable three-dimensionally preserved and complete skull. New anatomical information provided by this Danish fossil leads us to suggest that a number of cranial characters previously considered diagnostic for ratites may in fact be primitive among palaeognaths. The presence of members of Lithornithidae in the Lower Eocene (earliest Tertiary) is consistent with the hypothesis that basal divergences within Palaeognathae occurred at an earlier geological time, perhaps prior to the Cretaceous-Tertiary (K-T) boundary, as has been proposed based on evidence from much less well-preserved fossil material

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Citation

Leonard, L., Dyke, Gareth J. and Tuinen, M. (2005) A new specimen of the fossil Palaeognath Lithornis from the earliest Palaeogene of Denmark American Museum Novitates, 3491, pp. 1-11.

More information

Published date: 27 October 2005
Organisations: Ocean Biochemistry & Ecosystems

Identifiers

Local EPrints ID: 205245
URI: http://eprints.soton.ac.uk/id/eprint/205245
ISSN: 0003-0082
PURE UUID: 72d0072e-3407-4049-adbf-82e1bc7d7225

Catalogue record

Date deposited: 07 Dec 2011 17:39
Last modified: 18 Jul 2017 11:05

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Contributors

Author: L. Leonard
Author: Gareth J. Dyke
Author: M. Tuinen

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