Nannotax3 - ntax_cenozoic - Calyptrosphaera radiata

Nannotax3 - ntax_cenozoic - Calyptrosphaera radiata Nannotax3 - ntax_cenozoic - Calyptrosphaera radiata

Calyptrosphaera radiata

Classification: ntax_cenozoic -> Holococcoliths -> convex -> Calyptrosphaera radiata
Sister taxa: C. sphaeroidea HOL, S. pulchra HOL oblonga type, S. pulchra HOL pirus type, S. pulchra HOL galea type, C. divergens ⟩⟨ C. heimdaliae, C. lluisae, C. radiata, Flosculosphaera, Gliscolithus

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Taxonomy:

Citation: Calyptrosphaera radiata Sym & Kawachi 2000

Rank: species

Synonyms:

Holococcolithophora radiata (Sym & Kawachi 2000) Jordan et al. 2004. Name proposed based on the interpretation that Calyptrosphaera was a synonym of Syracosphaera. This is not established yet since the status of the type species, C. globosa is uncertain.

Distinguishing features:
Parent taxon (convex): Holococcoliths with tube, covered distally by a convex cover
This taxon: Liths tubular with large openings near base and closed distal end. Coccosphere vari-monomorphic (coccolith height varies)

Farinacci & Howe catalog pages: C. radiata *

Morphology:

The species is only known from cultures and the coccoliths are not well-formed. The shape is somewhat similar to Turrisphaera but the cells have prominent chloroplasts and lack a haptonema, whilst the Papposphaeraceae cells have prominent haptonemata but lack chloroplasts (Thomsen et al. 1995). Molecular genetic data suggest affinity with the Coccolithaceae and with Calyptrosphaera sphaeroidea.

Size:

Coccoliths up to 2µm long but height varies on coccosphere, about 0.8 µm wide

Search data:

LITHS: holococcolith, elliptical, cylindrical, hollow, CA: process,
CSPH: equant, monomorphic, CROSS-POLARS: V-prominent, R-prominent,

Lith size: 1->2µm; Coccosphere size: 5->7µm;
Data source notes: lith size (height) from illustrated specimens; csph size from illustrated specimens;

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: present in the plankton (Young et al. 2003)
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source: [JRY rough estimate]

Plot of occurrence data:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
(NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: convex

References:

Jordan, R. W., Cros, L. & Young, J. R. (2004). A revised classification scheme for living Haptophytes. Micropaleontology. 50(supplement 1): 55-79. gs

Sym, S. & Kawachi, M. (2000). Ultrastructure of Calyptrosphaera radiata, sp. nov. (Prymnesiophyceae, Haptophyta). European Journal of Phycology. 35: 283-293. gs V O

Calyptrosphaera radiata compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 2-4-2023

Taxon Search:

Advanced Search

AphiaID: 670396 Nomenclatural data on WoRMS
Short stables page link: https://mikrotax.org/Nannotax3/index.php?id=222 Go to Archive.is to create a permanent copy of this page - citation notes

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