Nannotax3 - ntax_cenozoic - Coccolithus pelagicus subsp. pelagicus HOL

Citation: Coccolithus pelagicus subsp. pelagicus (Wallich 1877) Schiller, 1930 HOL

Synonyms:

Crystallolithus hyalinus Gaarder and Markali 1956
Coccolithus pelagicus forma hyalinus (Gaarder & Markali) Kleijne 1991

Distinguishing features: Disk with single layer of crystallites in irregular rhombohedral array

Morphology: Liths with single layer of crystallites in rhomboid array (often with incomplete second layer), rim two crystallites high.

From the SEM apearance one might predict a rather oblique c-axis orientation but when coccospheres are examined in LM the coccoliths behave as if formed of vertically oriented calcite. [my obs - JRY 2017]

Ecology & Biogeography: Very common in Arctic and sub-Arctic assemblages

Biology & life-cycles: Life-cycle association with C. pelagicus ssp. pelagicus HET was first described by Parke & Adams (1960) from culture observations and is supported by many observations of combination coccospheres and by biogeography (Geisen et al. 2002).

Geological Range:
Last occurrence (top): Extant Data source: present in the plankton (Young et al. 2003)
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: [JRY rough estimate]

References:

Gaarder, K. R. & Markali, J. (1956). On the coccolithophorid Crystallolithus hyalinus n. gen, n. sp. Nytt Magasin for Botanikk. 5: 1-5. 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 V O

Kleijne, A. (1991). Holococcolithophorids from the Indian Ocean, Red Sea, Mediterranean Sea and North Atlantic Ocean. Marine Micropaleontology. 17: 1-76. gs

Okada, H. & McIntyre, A. (1977). Modern coccolithophores of the Pacific and North Atlantic Oceans. Micropaleontology. 23(1): 1-55. gs

Parke, M. & Adams, I. (1960). The motile (Crystallolithus hyalinus Gaarder & Markali) and non-motile phases in the life history of Coccolithus pelagicus (Wallich) Schiller. Journal of the Marine Biological Association of the United Kingdom. 39: 263-274. gs

Wallich, G. C. (1877). Observations on the coccosphere. Annals and Magazine of Natural History. 19: 342-350. gs V O

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 V O

Tags	LITHS: holococcolith, elliptical, CA: closed, CSPH: equant, monomorphic, CROSS-POLARS: 1ou, V-prominent,
Metrics	Lith size: 2->2.5µm; Coccosphere size: 10->15µm; Liths per sphere: 120->160 Data source notes: lith size from illustrated specimens; lith numbers from Yang & Wei 2003, range of estimates

Coccolithus pelagicus subsp. pelagicus HOL

References:

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