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Morphology, ultrastructure and affinity of Barremian (Lower Cretaceous) megaspores Dijkstraisporites and Paxillitriletes from Brilon-Nehden, Germany

Volker Wilde and Alan R. Hemsley
Morphology, ultrastructure and affinity of Barremian (Lower Cretaceous) megaspores Dijkstraisporites and Paxillitriletes from Brilon-Nehden, Germany
Palynology (2000) 24: 217-230

Abstract

A number of well-preserved megaspores of Paxillitriletes fairlightensis (Dijkstra) Potonie & Dijkstraisporites helios (Batten) Nicholson & Hall from the terrestrial Barremian (Lower Cretaceous) of Brilon-Nehden (Germany) have been investigated in detail using electron microscopy. Morphology and ultrastructure is compared to that of known examples of Mesozoic megaspores and this, combined with the presence of adherent monolete microspores, indicates an isoetalean affinity for both species. Furthermore, the reticulate body ornament, laesural and equatorial elaboration, and wall ultrastructure suggest a close systematic relationship between these two species. This is new evidence in support of the view that most Mesozoic and Tertiary megaspores with expanded laesural lips and/or zona belong to this order of heterosporous lycopsids.


ISSN: 0191-6122
EISSN: 1558-9188
Serial Title: Palynology
Serial Volume: 24
Title: Morphology, ultrastructure and affinity of Barremian (Lower Cretaceous) megaspores Dijkstraisporites and Paxillitriletes from Brilon-Nehden, Germany
Affiliation: Forschunginstitut Senckenberg Palaeobotanik, Frankfurt am Main, Federal Republic of Germany
Pages: 217-230
Published: 2000
Text Language: English
Publisher: American Association of Stratigraphic Palynologists, Dallas, TX, United States
References: 46
Accession Number: 2003-063529
Categories: Paleobotany
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 4 plates, sketch map
N47°15'00" - N55°00'00", E05°49'60" - E15°00'00"
Secondary Affiliation: University of Wales Cardiff, GBR, United Kingdom
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 200320
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