The oldest elasmosaurs (Sauropterygia, Plesiosauria) from Antarctica, Santa Marta Formation (upper Coniacian? Santonian–upper Campanian) and Snow Hill Island Formation (upper Campanian–lower Maastrichtian), James Ross Island

Polar research

José P. O'Gorman¹ 

[1] División Paleontología Vertebrados, Museo de La Plata, Universidad Nacional de La Plata Paseo del Bosque s/n., B1900FWALa Plata Argentina ;Consejo Nacional de Investigaciones Científicas y Técnicas Av Rivadavia 1917 C1033AAJBuenos Aires Argentina Correspondence

关键词: Elasmosauridae;    Antarctica;    Late Cretaceous;   

DOI  :  10.3402/polar.v31i0.11090

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

Elasmosaurs are recorded for the first time in the Lachman Crags Member (Beta Member) of the Santa Marta Formation (lower Campanian) and in the Herbert Sound Member of the Snow Hill Island Formation (upper Campanian). These are the first elasmosaurids from James Ross Island, Antarctic Peninsula. These records greatly improve our knowledge of the taxonomic diversity of plesiosaurs of the Santa Marta Formation and Herbert Sound Member of the Snow Hill Island Formation, and extend the lower limit of the record of Elasmosauridae in Antarctica to the lower Campanian, making this the oldest record of an Antarctic elasmosaur.

【 授权许可】

CC BY-NC