Calcidiscus leptoporus subsp. leptoporus

Classification: Coccolithophores -> Coccolithales -> Calcidiscaceae -> Calcidiscus -> C. leptoporus group -> Calcidiscus leptoporus -> Calcidiscus leptoporus subsp. leptoporus
Sister taxa: C. leptoporus subsp. leptoporus, C. leptoporus subsp. quadriperforatus, C. leptoporus subsp. small,


Citation: Calcidiscus leptoporus subsp. leptoporus (Murray & Blackman 1898) Loeblich & Tappan, 1978
Rank: sub-species
Basionym: Coccosphaera leptopora Murray and Blackman 1898
Synonyms: <em>Calcidiscus leptoporus</em> type C of Kleijne 1993

Distinguishing features: liths 5-8µm, often weakly elliptical, sutures sharp around central area

Farinacci & Howe catalog pages: Coccosphaera leptopora *

Morphology remarks: Coccoliths intermediate sized, 5-8 µm, with 15-30 elements; distal shield sutures smoothly curved. The most common form.

Biology & life-cycles: HOL = planar holococcolith with crystallites in hexagonal array (formerly called Crystallolithus rigidus). Combination coccospheres documented by Kleijne (1993), Cortes (2000), and Renaud & Klaas (2001). Also life-cycle transition observed in culture (Houdan et al. 2004). Association discussed by Geisen et al. (2002).

Cultures: strains of this species are maintained in culture, for details see Roscoff culture collection.

See also: Calcidiscus leptoporus subsp. leptoporus HOL - holococcolith phase;;

Search data:
TagsLITHS: placolith, circular, sub-circular, CA: Placoliths: closed-----, closed,
CSPH: spherical, equant, monomorphic, V-UNITS: distal shield, tube, V-prominent, R-UNITS: prox shield, R-prominent, DETAILS: isogyres oblique, rim-unicyclic,
MetricsLith size: 5->8µm; Coccosphere size: 10->18µm;
Sources: lith & csph size from Knappertsbusch et al. 1997
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 Miocene Epoch (5.33-23.03Ma, base in Aquitanian stage). Data source: [JRY rough estimate]

Plot of occurrence data:

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Calcidiscus leptoporus subsp. leptoporus, synonyms included - Calcidiscus leptoporus (5-8 µm); Calcidiscus leptoporus subsp. leptoporus;
  • space-time plot :: Samples map :: Parent: Calcidiscus leptoporus


    Cortés, M. Y. (2000). Further evidence for the heterococcolith-holococcolith combination Calcidiscus leptoporus-Crystallolithus rigidus. In, Young, J. R. , Thierstein, H. R. & Winter, A. (eds) Nannoplankton ecology and palaeocology, Proceedings of the INA7 conference, Puerto Rico, February 2004. Marine Micropaleontology. 39(1-4): 35-37. gs :: ::

    Geisen, M., Billard, C., Broerse, A. T. C., Cros, L., Probert, I. & Young, J. R. (2002a). Life-cycle associations involving pairs of holococcolithophorid species: intraspecific variation or cryptic speciation?. European Journal of Phycology. 37: 531-550. gs :: ::

    Houdan, A. et al. (2004a). Flow cytometric analysis of relative ploidy levels in holococcolithophore-heterococcolithophore (Haptophyta) life cycles. Systematics and Biodiversity. 1(4): 453-465. gs :: ::

    Kleijne, A. (1993b). Morphology, Taxonomy and distribution of extant coccolithophorids (Calcareous nannoplankton). Drukkerij FEBO B.V., Katwijk. 321-. gs :: ::

    Murray, G. & Blackman, V. H. (1898). On the nature of the Coccospheres and Rhabdospheres. Philosophical Transactions of the Royal Society of London (B). 190(1): 427-441. gs :: view :: open

    Renaud, S. & Klaas, C. (2001). Seasonal variations in the morphology of the coccolithophore Calcidiscus leptoporus off Bermuda (N. Atlantic). Journal of Plankton Research. 23(8): 779-795. gs :: ::

    Young, J. R., Geisen, M., Cros, L., Kleijne, A., Probert, I. & Ostergaard, J. B. (2003). A guide to extant coccolithophore taxonomy. Journal of Nannoplankton Research, Special Issue. 1: 1-132. gs :: view :: open


    Calcidiscus leptoporus subsp. leptoporus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 30-5-2020

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