open-tube


Classification: ntax_cenozoic -> Holococcoliths -> open-tube
Sister taxa: tubeless, convex, bridged, flat-topped, septate, open-tube, fossil holococcoliths, U. extant holococcolith

Daughter taxa (time control age-window is: 0-800Ma)Granddaughter taxa
Calicasphaera
Chalice-shaped coccoliths. Monomorphic

Papposphaera HOL
Tower-like holococcoliths formed from hexagonal crystallite groups.

Trigonaspis
Holococcoliths formed of triangular crystallite groups (ca. 0.15 µm across), each composed of three (?hexagonal) sub-units.
Dimorphic CFCs tower-like, BCs simple disks.

Taxonomy:

Citation: Cup-shaped holococcoliths - informal grouping proposed by Young et al., 2003
Rank: informal group of genera

Distinguishing features: Holococcoliths with tube, open distally (or cover recessed)

Farinacci & Howe catalog pages: open-tube [no catalog entry yet]

Search data:
TagsLITHS: hollow,
MetricsLith size: 0->0µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): at top of No known fossil record modern (100% up, 0Ma, in "Holocene" stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Young, J. R., Geisen, M., Cros, L., Kleijne, A., Probert, I. & Ostergaard, J. B. (2003). A guide to extant coccolithophore taxonomy. Journal of Nannoplankton Research, Special Issue. 1: 1-132. gs V O


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open-tube compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 13-6-2021

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=960 Go to Archive.is to create a permanent copy of this page - citation notes



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