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Additional Pelagornithidae remains from Seymour Island, Antarctica
Journal of South American Earth Sciences ( IF 1.704 ) Pub Date : 2020-01-20 , DOI: 10.1016/j.jsames.2020.102504
Carolina Acosta Hospitaleche, Marcelo Reguero

Two incomplete mandibles are assigned to Pelagornithidae given the presence of a well marked neurovascular furrow and the unique bony projections, or “pseudo-teeth”, along the crista tomialis. Specimens IAA-Pv 175 from Ypresian levels of La Meseta Alloformation (Cucullaea I Allomember), and IAA-Pv 823 from Bartonian beds of the Submeseta Alloformation, in Seymour Island (Antarctic Peninsula, West Antarctica) corresponds to the morpho-type 1, previously proposed for Antarctic pseudo-tooth birds.

The intermediate condition of the pseudo-teeth of these specimens reinforces the idea that diet changed from piscivory to molluscivory along the evolutive history of the group.

更新日期:2020-01-20

 

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