A NEW CAMPANIAN DINOFLAGELLATE CYST FROM ANTARCTICA: A BIOSTRATIGRAPHIC AND PALEOECOLOGICAL KEY SPECIES

Palynological analysis of Upper Cretaceous marine rocks from the Rabot and Snow Hill Island formations, James Ross Basin, northeastern Antarctic Peninsula, has revealed the record of a previously undescribed dinoflagellate cyst species, previously assigned to Oligosphaeridium sp. A. Here, we provide...

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Bibliographic Details
Published in:Publicación Electrónica de la Asociación Paleontológica Argentina
Main Authors: Cecilia Rodríguez Amenábar, Alessandra Santos, G. Raquel Guerstein
Format: Article in Journal/Newspaper
Language:English
Spanish
Published: Asociación Paleontológica Argentina 2024
Subjects:
Marine Palynology
Offshore paleoenvironments
Biostratigra´phy
Late Cretaceous
James Ross Basin
Antarctic Peninsula
Fossil man. Human paleontology
GN282-286.7
Paleontology
QE701-760
Antarc*
Antarctic
Antarctica
Snow Hill Island
Online Access:https://doi.org/10.5710/PEAPA.15.02.2024.487
https://doaj.org/article/9d2e28fadf2a4d08a9f47963760fbcf7
Description
Summary:Palynological analysis of Upper Cretaceous marine rocks from the Rabot and Snow Hill Island formations, James Ross Basin, northeastern Antarctic Peninsula, has revealed the record of a previously undescribed dinoflagellate cyst species, previously assigned to Oligosphaeridium sp. A. Here, we provide a formal description of this new species, which we name Stiphrosphaeridium sobralii sp. nov. and we add some features to the description of the genus Stiphrosphaeridium. The new species is found in Campanian strata, which are calibrated with magnetostratigraphic data. It is considered an important Late Cretaceous biostratigraphic marker commonly recorded in offshore environments of Antarctica.

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