Calicasphaera


Classification: ntax_cenozoic -> Holococcoliths -> open-tube -> Calicasphaera
Sister taxa: Calicasphaera, Papposphaera HOL, Trigonaspis

Daughter taxa (time control age-window is: 0-800Ma)
Calicasphaera blokii
Liths oval, low, with blocky crystallites.
Calicasphaera concava
Liths circular, almost as high as wide, opening continuously from narrow base; proximal opening
Calicasphaera diconstricta
Liths sub-circular; tall stem, with two constrictions.
Calicasphaera sp.
Specimens which cannot be assigned to established species

Taxonomy:

Citation: Calicasphaera Kleijne, 1991
Rank: Genus
Type species: Calicasphaera diconstricta Kleijne, 1991

Distinguishing features: Chalice-shaped coccoliths. Monomorphic

Farinacci & Howe catalog pages: Calicasphaera *


Morphology: The coccoliths outer tube of the coccoliths is formed of regular calcit rhombohedra, at the base there is usually a proximal flange conssiting of a single ring of crystallites and a proximal plate which may cover the central area or have a central opening (especially in C. concava). In distal view additional less regular crystalites ocur within the tube, it is not celar whether these form an inner tube or or a recessed distal cover. The irregular appearance of these inner crystallites is a distinctive aspect of the morphology of the genus.


Phylogenetic relations: Possible affinities to Turrisphaera - based on general morphlogy.

Search data:
TagsLITHS: holococcolith, circular, cylindrical, hollow, CROSS-POLARS: R-prominent,
MetricsLith size: 1->1.5µm; Coccosphere size: 5->11µm;
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:

Kleijne, A. (1991). Holococcolithophorids from the Indian Ocean, Red Sea, Mediterranean Sea and North Atlantic Ocean. Marine Micropaleontology. 17: 1-76. gs


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Calicasphaera compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 23-4-2021

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=209 Go to Archive.is to create a permanent copy of this page - citation notes



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