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. | Calciosolenia brasiliensis Calciosolenia corsellii Calciosolenia murrayi Calciosolenia alternans Calciosolenia aperta Calciosolenia sp. |
Taxonomy:
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:
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
Lith size: 0->0µm; |
Geological Range:
Last occurrence (top): Extant. Data source: Total of ranges of the species in this database
First occurrence (base): within Paleocene Epoch (55.96-66.04Ma, base in Danian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
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. (1927). Beitrag zur Kenntnis adriatischer Coccolithophoriden. Archiv für Protistenkunde. 58: 173-184. gs 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. gsReferences:
Calciosoleniaceae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 10-12-2024
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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