Nannotax3 - ntax_cenozoic - Cyrtosphaera Nannotax3 - ntax_cenozoic - Cyrtosphaera

Cyrtosphaera


Classification: ntax_cenozoic -> Syracosphaerales -> Rhabdosphaeraceae -> Cyrtosphaera
Sister taxa: Acanthoica, Algirosphaera, Blackites, Cyrtosphaera, Discosphaera, Palusphaera, Rhabdosphaera, Solisphaera

Daughter taxa (time control age-window is: 0-800Ma)
Cyrtosphaera aculeata
BCs with prominent papillae CFC spines weakly developed
Cyrtosphaera cidaris
Coccoliths with narrow rim, broadly elliptical with slight inflection on sides;  sharp conical “witches hat” protrusion.
Cyrtosphaera sp.
Specimens which cannot be assigned to established species

Taxonomy:

Citation: Cyrtosphaera Kleijne, 1992
taxonomic rank: Genus
Type species: Acanthoica aculeata Kamptner, 1941

Distinguishing features:
Parent taxon (Rhabdosphaeraceae): BCs planoliths with radial lath cycle and highly-variable axial structures. Often polymorphic and/or varimorphic
This taxon: Body coccoliths with well-developed radial lath cycle, protrusion in centre; coccospheres varimorphic higher protrusions on circum-flagellar coccoliths

Farinacci & Howe catalog pages: Cyrtosphaera *

Search data:
LITHS: planolith, elliptical, CA: ca_disjunct, grill, process,
CSPH: equant, monomorphic,
Lith size: 2->4µm; Coccosphere size: 6->12µm;
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 ranges of the species in this database
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source: Total of ranges of species in this database

Plot of occurrence data:

References:

Kleijne, A. (1992). Extant Rhabdosphaeraceae (coccolithophorids, class Prymnesiophyceae) from the Indian Ocean, Red Sea, Mediterranean Sea and North Atlantic Ocean. Scripta Geologica. 100: 1-63. gs


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Cyrtosphaera compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 11-10-2024

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=414 Go to Archive.is to create a permanent copy of this page - citation notes
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