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

Authors

  • Roberto Videira-Santos Goiás State University image/svg+xml
  • Sandro Marcelo Scheffler Museu Nacional, Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, RJ
  • Alexander Wilhelm Armin Kellner Museu Nacional, Universidade Federal do Rio de Janeiro, UFRJ, Rio de Janeiro, RJ

Keywords:

Ammonoidea, Scaphopoda, Santonian-Campanian, Larsen Basin, Antarctica

Abstract

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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Published

2021-12-24

Issue

Vol. 15 (2021): Palaios 20 years Dossier - Stratigraphic Paleontology

Section

Dossiê Temático Palaios 20 anos – Paleontologia Estratigráfica

License

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How to Cite

New occurrences of mollusks from the Santa Marta and Snow Hill Island (Gamma Member) formations, Upper Cretaceous, James Ross Island, Antarctic Peninsula. Terr@ Plural, [S. l.], v. 15, p. 1–13, 2021. Disponível em: https://revistas.uepg.br/index.php/tp/article/view/17732. Acesso em: 30 apr. 2026.