F. involutus group

Classification: Coccolithophores -> Discoasterales -> Fasciculithaceae -> Fasciculithus -> F. involutus group
Sister taxa: F. alanii group, F. involutus group, F. schaubii group, F. sp.,

Daughter taxa: (blue => in age window 0-800Ma)
Cylindrical with fenestrae and a convex upper surface.
Small to medium sized, squat cylindrical fasciculith, almost square in side view, with gently convex upper surface. Without fenestrae.


Citation: Fasciculithus involutus group
Rank: species group

Distinguishing features: Cylindrical fasciculiths

Farinacci & Howe catalog pages:

Search data:
TagsLITHS: nannolith-radiate, cylindrical, circular,
CSPH: not known, V-UNITS: none, R-UNITS: all, DETAILS: isogyres radial,
MetricsLith size: 4->9µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: occurs throughout the range of the genus
Last occurrence (top): near base of Ypresian Stage (5% up, 55.6Ma, in Ypresian stage). Data source: Total of range of species in this database
First occurrence (base): near base of Selandian Stage (5% up, 61.5Ma, in Selandian stage). Data source: Total of range of species in this database

Plot of occurrence data:


Bown, P. R. (2010). Calcareous nannofossils from the Paleocene/Eocene Thermal Maximum interval of southern Tanzania (TDP Site 14). Journal of Nannoplankton Research. 31: 11-38. gs


F. involutus group compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-9-2019

Taxon Search:
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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=560 Go to Archive.is to create a permanent copy of this page - citation notes

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