Perchnielsenella


Classification: Mesozoic -> Watznaueriales -> Watznaueriaceae -> Perchnielsenella
Sister taxa: Bussonius, Cyclagelosphaera, Diazomatolithus, Lotharingius, Watznaueria, Ansulasphaera, Bibreviconus, Perchnielsenella,

Distinguishing features: Medium to large, barrel-shaped coccoliths that are highly-birefringent and seen in both side and plan view.


Daughter taxa: (blue => in age window 0-800Ma)
Medium to large, barrel-shaped coccoliths that are highly-birefringent and seen in both side and plan view. Narrow central area.
Specimens not identified to species level

Taxonomy:

Citation: Perchnielsenella Watkins in Watkins & Bowdler, 1984
Rank: Genus
Type species: Perchnielsenella stradneri (Perch-Nielsen, 1973) Watkins in Watkins & Bowdler, 1984

Farinacci & Howe catalog pages: Perchnielsenella * , ,

Distinguishing features: Medium to large, barrel-shaped coccoliths that are highly-birefringent and seen in both side and plan view.

Geological Range:
Last occurrence (top): at top of Maastrichtian Stage (100% up, 66Ma, in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Campanian Stage (0% up, 83.6Ma, in Campanian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs

Perch-Nielsen, K. (1973). Neue Coccolithen aus dem Maastrichtien von Danemark, Madagaskar und Agypten. Geological Society of Denmark, Bulletin. 22: 306-333. gs

Watkins, D. K. & Bowdler, J. L. (1984). Cretaceous calcareous nannofossils from Deep Sea Drilling Project Leg 77, southeast Gulf of Mexico. Initial Reports of the Deep Sea Drilling Project. 77: 649-674. gs


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Perchnielsenella compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 21-7-2019

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10867 Go to Archive.is to create a permanent copy of this page - citation notes



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