New occurrences of mollusks from the Santa Marta and Snow Hill Island (Gamma Member) formations, Upper Cretaceous, James Ross Island, Antarctic Peninsula

Although the fossil record from Antarctica is increasing continuously, there is still a great lack of knowledge regarding the past biodiversity of this continent. Here we present the first occurrences of the ammonoid Pseudophyllites? cf. latus in the Santa Marta Formation (Santonian-early Campanian)...

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Bibliographic Details
Published in:Terr Plural
Main Authors: Roberto Videira-Santos, Sandro Marcelo Scheffler, Alexander Wilhelm Armin Kellner
Format: Article in Journal/Newspaper
Language:English
Spanish
Portuguese
Published: Universidade Estadual de Ponta Grossa 2021
Subjects:
ammonoidea
scaphopoda
santonian-campanian
larsen bsin
antarctica
geo
archeo
Antarctic
Antarctic Peninsula
Hill Island
Ross Island
Snow Hill
Snow Hill Island
Antarc*
Antarctica
James Ross Island
Online Access:https://doi.org/10.5212/TerraPlural.v.15.2117732.027
https://doaj.org/article/447f8318e94a4f518c8d9245771effa7
Description
Summary:Although the fossil record from Antarctica is increasing continuously, there is still a great lack of knowledge regarding the past biodiversity of this continent. Here we present the first occurrences of the ammonoid Pseudophyllites? cf. latus in the Santa Marta Formation (Santonian-early Campanian) and the scaphopod Laevidentallium? sp. (Laevidentallidae) in the Gamma Member (late Campanian) of the Snow Hill Island Formation (late Campanian - early Maastrichtian). The presence of Laevidentalliidae in the Gamma Member characterizes the oldest occurrence of this family in Antarctica and it is apparently another taxon that originated in this continent and later migrated to lower latitudes.

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