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Impagidinium obscurum sp. nov., a marker dinoflagellate cyst for the Thanetian (Paleocene) of the North Sea and the Barents Sea

Manuel Vieira, Manuel Casas-Gallego, Salih Mahdi and Jim Fenton
Impagidinium obscurum sp. nov., a marker dinoflagellate cyst for the Thanetian (Paleocene) of the North Sea and the Barents Sea
Palynology (April 2020) 44 (2): 382-390

Abstract

This paper presents the formal description of Impagidinium obscurum sp. nov. from the Thanetian strata of northwest Europe. The palaeogeographic distribution of this species covers a wide area, ranging from the North Sea to the Barents Sea. Palynologists working in the region have long referred to Impagidinium obscurum sp. nov. as Leptodinium 'obscurum' and used it as an important intra-Paleocene marker species. The informal specific name was with reference to the incompletely defined tabulation of the cyst. However, although the tabulation is often obscured by the dense folding of the walls, the cyst tabulation formula has been partly deciphered in this work, based on the organisation of sutural crests in exceptionally well-preserved specimens, which allows confident attribution to the genus Impagidinium. This species is restricted to the 'early' Thanetian and is associated with diverse dinoflagellate cyst assemblages which include Alisocysta margarita and Areoligera gippingensis.


ISSN: 0191-6122
EISSN: 1558-9188
Serial Title: Palynology
Serial Volume: 44
Serial Issue: 2
Title: Impagidinium obscurum sp. nov., a marker dinoflagellate cyst for the Thanetian (Paleocene) of the North Sea and the Barents Sea
Affiliation: Shell UK, Nigg, United Kingdom
Pages: 382-390
Published: 20200402
Text Language: English
Publisher: American Association of Stratigraphic Palynologists, Dallas, TX, United States
References: 41
Accession Number: 2021-038915
Categories: PaleobotanyStratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Includes appendix
Illustration Description: illus. incl. 1 plate, sketch map
N59°16'00" - N59°16'00", E02°37'00" - E02°37'00"
Secondary Affiliation: CGG Robertson, GBR, United KingdomRPS Ichron, GBR, United Kingdom
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2021, American Geosciences Institute. Abstract, Copyright, American Association of Stratigraphic Palynologists. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 202112
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