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Keywords = López de Bertodano Formation

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33 pages, 11328 KB  
Article
New Species of Vegavis (Neornithes) from Antarctica Highlights Unexpected Cretaceous Antarctic Diversity
by Facundo Irazoqui, Carolina Acosta Hospitaleche, Ariana Paulina-Carabajal, Paula Bona and Nahuel Vega
Diversity 2026, 18(2), 82; https://doi.org/10.3390/d18020082 - 30 Jan 2026
Abstract
A fossil bird (MLP-PV 15-I-7-52) from Marambio (Seymour) Island, Antarctica, is described, representing the best-preserved skull reported for a Cretaceous neornithine and associated postcranial elements. Morphological analysis of the articular portion of the mandible, the pterygoid, and the femur supports the assignment of [...] Read more.
A fossil bird (MLP-PV 15-I-7-52) from Marambio (Seymour) Island, Antarctica, is described, representing the best-preserved skull reported for a Cretaceous neornithine and associated postcranial elements. Morphological analysis of the articular portion of the mandible, the pterygoid, and the femur supports the assignment of this specimen to the genus Vegavis. The palatine morphology exhibits a combination of plesiomorphic and autapomorphic characters within Neognathae. Substantial differences in the size relationship between the ala preacetabularis and the femur, as well as differences between the femora of V. iaai and MLP-PV 15-I-7-52, indicate that the latter represents a new species of Vegavis. In addition, a third species of Vegavis is proposed based on the AMNH FARB 30899 specimen, previously assigned to V. iaai, which exhibits substantial differences with the above-mentioned specimens, particularly in the mandibular morphology. Full article
(This article belongs to the Collection Feature Papers in Animal Diversity)
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