Taxonomic investigations of palynomorphs from the Byers group (Upper Jurassic‐Lower Cretaceous), Livingston and Snow islands, Antarctic Peninsula

Two new palynomorph taxa are described, and several existing taxa are discussed from the Upper Jurassic‐Lower Cretaceous Byers Group of Livingston and Snow islands, South Shetland Islands, Antarctic Peninsula. Oligosphaeridium byersense sp. nov., a dinoflagellate cyst species, is found in the Valang...

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Bibliographic Details
Published in:Palynology
Main Author: Duane, Ailbhe M.
Format: Article in Journal/Newspaper
Language:unknown
Published: Taylor and Francis 1997
Subjects:
Antarctic
Antarctic Peninsula
South Shetland Islands
Byers
Antarc*
Online Access:http://nora.nerc.ac.uk/id/eprint/514459/
https://doi.org/10.1080/01916122.1997.9989491
Description
Summary:Two new palynomorph taxa are described, and several existing taxa are discussed from the Upper Jurassic‐Lower Cretaceous Byers Group of Livingston and Snow islands, South Shetland Islands, Antarctic Peninsula. Oligosphaeridium byersense sp. nov., a dinoflagellate cyst species, is found in the Valanginian interval of the Byers Group. Globorotundata acrita gen. et sp. nov., apalynomorph of unknown affinity, is areliable indicator of dysaerobia‐anaerobia and/or shallow marine paleoceanographic conditions, when present in moderate to high numbers. This paper includes the first description and discussion of focused ion beam milling preparation of palynological material.

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