Calyptrosphaera radiata


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

Taxonomy:

Citation: Calyptrosphaera radiata Sym & Kawachi 2000
Rank: species

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

Farinacci & Howe catalog pages: C. radiata [no catalog entry yet]


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

References:

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

nannotaxlogo400px

Calyptrosphaera radiata compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 8-3-2021

Taxon Search:
Advanced Search

Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=222 Go to Archive.is to create a permanent copy of this page - citation notes
Powered by Mikrotax taxonomy content management system developed by Jeremy Young


Comments (0)

No comments yet on this page. Please do add comments if you spot any problems, or have information to share

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics