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

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. The...

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Bibliographic Details
Published in:Polar Research
Main Author: José P. O'Gorman
Format: Article in Journal/Newspaper
Language:English
Published: Norwegian Polar Institute 2012
Subjects:
Elasmosauridae
Antarctica
Late Cretaceous
geo
archeo
Antarctic
Antarctic Peninsula
Herbert Sound
Hill Island
Lachman
Lachman Crags
Ross Island
Snow Hill
Snow Hill Island
Antarc*
James Ross Island
Polar Research
Online Access:https://doi.org/10.3402/polar.v31i0.11090
https://doaj.org/article/a6fab1d8aba240c783d75da66a5e4e23
Description
Summary: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.

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