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