convex


Ancestry: Coccolithophores -> Holococcoliths -> convex
Sister taxa: tubeless, convex, bridged, flat-topped, septate, open-tube, fossil holococcoliths,

Short diagnosis: Holococcoliths with tube, covered distally by a convex cover


Daughter taxa (blue => in age window 0-300Ma) Granddaughter taxa
not elevated - height < length
Tube merges into cover; irregular crystallites

Tube merges into cover; hexagonal mesh fabric

Tube and cover sharply separated; cover with openings at base

Tube sharply separated from cover; cover with perforations

Tube high and well-separated from cover; hexagonal mesh fabric

elevated - height > length
Tube and cover sharply separated; cover elevated with openings at base and apex

Liths tubular with large openings near base and closed distal end. Coccosphere vari-monomorphic (coccolith height varies)

Flaring tube-shaped coccoliths with distal cover - flosculoliths. Monomorphic.

Bulb-shaped coccoliths - gliscoliths. Monomorphic.

Taxonomy:

Citation: Holococcoliths with convex cover over the tube - informal grouping proposed by Young et al., 2003
Rank: informal grouping

Farinacci & Howe catalog pages: convex [no catalog entry yet]

Short diagnosis: Holococcoliths with tube, covered distally by a convex cover

Search data:
TagsLITHS: holococcolith, H: cavate, H: disk-like,
MetricsLith size: 0.9->3.2┬Ám;
Sources:
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): within Gelasian Stage (1.81-2.59Ma, base in Gelasian 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.


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convex compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 26-9-2017

Taxon Search:
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AphiaID: not found
Go to Archive.is to create a permanent copy of this page - citation notes



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