Nannotax3 - ntax_cenozoic - Calciosolenia murrayi

Citation: Calciosolenia murrayi Gran, 1912

Synonyms:

Acanthosolenia mediterranea Bernard 1939;
Calciosolenia sinuosa Schlauder 1945 [according to Okada & McIntyre 1977]
Calciosolenia compacta Martini (1981) [described from the Quaternary but falls well inside range of variation of modern C. murrayi - JRY]

Variants: Malinverno 2004 recognised four types within C. murrayi based primarily on the sepration of the laths in the central area of the body coccoliths

Type 1: laths well-separated; marked spurs at the ends of the liths; 2.5-3.1µm
Type 2: laths weakly-separated; 2.6-3.1µm
Type 3: laths overlapping; 2.6-2.7µm
Type 4: laths tile-like, strongly overlapping; 3.4-3.8µm long

She interpreted this variation as most likely being a case of variable degree of calcification, since the types intergraded and coccospheres with more than coccolith type can occur.

Distinguishing features:
Parent taxon (Calciosolenia): Coccosphere with rhombic muroliths with central area floored by transverse laths (scapholiths); varimorphic or dimorphic.
This taxon: Dimorphic - terminal coccoliths have one end extended into spine; coccoliths 2.5-4 µm long, often with overlapping laths

Coccosphere dimorphic, broad, tapering rather abruptly at ends with only a few elongate liths. Terminal liths have one end extended into spine. Bars not very regular and often merge into continuous sheet. Liths 2.5-4 µm long, spines up to 25 µm, coccospheres up to 30 µm.
For identification note that the liths usually are smaller than an E. huxleyi coccolith and/or have overlapping laths.

Liths 2.5-4 µm long, spines up to 25 µm, coccospheres up to 30 µm.

Geological Range:
Notes: Frequently recorded in the fossil record, but mainly as a default identification.
Last occurrence (top): Extant. Data source: present in the plankton (Young et al. 2003)
First occurrence (base): within Paleocene Epoch (55.96-66.04Ma, base in Danian stage). Data source: [JRY rough estimate]

References:

Andruleit, H., Rogalla, U. & Staeger, S. (2005). Living coccolithophores recorded during the onset of upwelling conditions off Oman in the western Arabian Sea. Journal of Nannoplankton Research. 27(1): 1-14. gs

Bernard, F. (1939). Coccolithophorides nouveaux ou peu connus observes à Monaco en 1938. Archives de Zoologie Expérimentale et Générale, Paris. 81: 33-44. gs

Cerino, F., Malinverno, E., Fornasaro, D., Kralj, M. & Cabrini, M. (2017). Coccolithophore diversity and dynamics at a coastal site in the Gulf of Trieste (northern Adriatic Sea). Estuarine Coastal and Shelf Science. 196: 331-345. gs

Cros, L. & Fortuño, J. -M. (2002). Atlas of northwestern Mediterranean coccolithophores. Scientia Marina. 66: 1-186. gs

Gran, H. H. (1912). Pelagic plant life. In, Murray, J. & Hjort, J. (eds) The Depths of the Ocean. Macmillan, London 307-386. gs

Malinverno, E. (2004). Morphological variability within the genus Calciosolenia (coccolithophorids) from the eastern Mediterranean Sea. Micropaleontology. 50(supl. 1): 81-91. gs

Malinverno, E., Leoni , B. & Galli, P. (2022). Coccolithophore assemblages and a new species of Alisphaera from the Faafu Atoll, Maldives, Indian Ocean. Marine Micropaleontology. 172(102110): 1-16. gs

Manton, I. & Oates, K. (1985). Calciosoleniaceae (coccolithophorids) from the Galapagos Island: unmineralized components and coccolith morphology in Anoplosolenia and Calciosolenia, with comparative analysis of equivalents in the unmineralized genus Navisolenia (Haptophyceae = Prymnesiophyceae). Philosophical Transactions of the Royal Society of London. 309: 461-477. gs

Schlauder, J. (1945). Recherches sur les flagellés calcaires de la Baie d'Alger. PhD thesis, Université d'Alger. 1-51. gs

Yang, T. -N., Wei, K. & Wu, J. -T. (2012). Marine coccolithophores around Taiwan. Biodiversity Research Center, Academica Sinica, Taipei. 1-96. 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. S1: 1-132. gs

Calciosolenia murrayi

References:

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