Nannotax3 - ntax_main - Calciosoleniaceae

Nannotax3 - ntax_main - Calciosoleniaceae Nannotax3 - ntax_main - Calciosoleniaceae

Calciosoleniaceae

Classification: ntax_main -> Syracosphaerales -> Calciosoleniaceae
Sister taxa: Calciosoleniaceae, Rhabdosphaeraceae, Syracosphaeraceae

Daughter taxa (time control age-window is: 0-800Ma)					Granddaughter taxa
				Calciosolenia Coccosphere with rhombic muroliths with central area floored by transverse laths (scapholiths); varimorphic or dimorphic. Rim bicyclic in LM (the outer part of the rim is dark in xpl, the inner part bright). Typically small, fragile and dissolution susceptible, and so only consistently seen as fossils when preservation is good.	Calciosolenia brasiliensis Calciosolenia corsellii Calciosolenia murrayi Calciosolenia alternans Calciosolenia aperta Calciosolenia sp. Calciosolenia fossilis Calciosolenia huberi Calciosolenia sp. Mesozoic

Taxonomy:

Citation: Calciosoleniaceae Kamptner, 1937

Taxonomic rank: family

Synonyms: syn

Taxonomic discussion: This family is not recognised in some classifications of the extant coccolithophores, with the genera instead being included in the Syracosphaeraceae, mainly due to similarities between central-area structures. We prefer to maintain it as a separate family since the rim structure is not like that of typical Syracosphaeraceae (Bown et al. 2017). The group ranges back into the Mesozoic and may have evolved from the Stephanolithiaceae (see e.g. Perch-Nielsen 1985a, Bown & Young 1997).

Distinguishing features:
Parent taxon (Syracosphaerales): 2N: Coccoliths with radial lath cycle of T-units, and disjunct, often complex, axial structure, coccospheres often polymorphic, usually motile
N: Form holococcoliths, highly variable
This taxon: Narrow-rimmed muroliths with central-lath structures but no axial structure. Often strongly varimorphic

Farinacci & Howe catalog pages:
Calciosoleniaceae

Morphology:

Coccospheres: motile, monothecate, with elongate shape.
Coccoliths: muroliths without flanges, usually termed scapholiths (synonym rhomboliths). The rim is predominantly formed of V-units, with small R-units at the base/inner margin (our obs.). The central-area has a single lath-cycle; pairs of laths from opposite sides of coccolith meet, forming transverse bars. Typically rhombic but there is also an extant form Alveosphaera bimurata with elongate oblong coccoliths. Reference: Manton & Oates (1985) - coccolith structure.

Phylogenetic relations

There is a non-calcifying haptophyte Navisolenia Lecal 1965, which has an elongate test, covered in rhombic scales. As discussed by Leadbeater & Morton (1973) and Manton & Oates (1985) it is strikingly similar to Calciosolenia. These similarities include, in addition to basic form, the patterning of the base-plate scale and sense of asymmetry of the scales. Hence, it was included in the Calciosoleniaceae by Jordan and Green (1994). However, rhombic plates are clearly an efficient way to cover an elongate test and this basic morphology has almost certainly evolved separately in the genus Placorhombus.

Search data:

Lith size: 0->0µm;

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: Total of ranges of the species in this database
First occurrence (base): within Early Hauterivian Substage (130.60-132.60Ma, base in Hauterivian stage). Data source: Total of ranges of species in this database

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.
See also: customisable plot Parent: Syracosphaerales

References:

Bown, P. R., Lees, J. A. & Young, J. R. (2017). On the Cretaceous origin of the Order Syracosphaerales and the genus Syracosphaera. Journal of Micropalaeontology. 36(2): 153-165. gs

Jordan, R. W. & Green, J. C. (1994). A check-list of the extant haptophyta of the world. Journal of the Marine Biological Association of the United Kingdom. 74: 149-174. gs

Kamptner, E. (1937b). Neue und bemerkenswerte Coccolithineen aus dem Mittelmeer. Archiv für Protistenkunde. 89: 279-316. gs O

Leadbeater, B. S. C. & Morton, C. (1973). Ultrastructural observations on the external morphology of some members of the Haptophyceae from the coast of Jugoslavia. Nova Hedwigia. 24(1): 207-233. gs

Lecal, J. (1965). Navisolenia n. g. aprili n. sp. Bulletin de la Société d'Histoire Naturelle de Toulouse. 100: 422-426. 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

Missing or ambiguous references: ;

Calciosoleniaceae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 15-7-2026

Taxon Search:

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=208 Go to Archive.is to create a permanent copy of this page - citation notes

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Comments (2)

Görög Agnes(Hungary)

Calciosoleniaceae Kamptner, 1928 the correct year and not 1927.

It was published in: Kamptner, E. (1928). Über das System und die Phylogenie der Kalkflagellaten. Archiv für Protistenkunde. 64: 19-43

10 February 2026 15:17

Jeremy Young

Agnes

Thank you for pointing that out. You are certainly right that 1927 is the wrong year, that was a typo for 1937 (Kamptner, E. (1937). Neue und bemerkenswerte Coccolithineen aus dem Mittelmeer. Archiv für Protistenkunde 89: 279-316.). That is the reference which is normally given (e.g. by Loeblich & Tappan 1966). However, I don't have copies of either Kamptner 1937 or Kamptner 1928, if you have a copy of Kamptner 1928 could you send me a copy - or double check it for this?

thank you Jeremy

10 February 2026 16:52