/Calcidiscus leptoporus subsp. leptoporus HOL/JRYSEM-280-19p.JPG)
/Coccolithus pelagicus subsp. pelagicus HOL/Young_etal_2003_122-20.JPG)
/Calcidiscus leptoporus subsp. leptoporus HOL/Young_etal_2003_174-12.JPG)
/Calcidiscus leptoporus subsp. leptoporus HOL/Young_etal_2003_bl08-rigidus.JPG)
CFCs with transverse ridge of bridge
Short diagnosis: Holococcoliths without a tube, flat or cap-shaped
| Daughter taxa (blue => in age window 0-300Ma) | Granddaughter taxa | ||||
| | | | fried egg shape, dimorphic (CFCs with large leaf-like process) | |
| | | | | |
| | | | Liths are planar disks, variable ultrastructure. Cocospheres monomorphic. The species were formerly in Crystallolithus | |
| | | | BCs disks, may have ridge CFCs with transverse ridge of bridge | |
| | | | BCs with flat rim and central protrusion, no marginal perforations, CFCs similar to BCs | |
| | | | Lightly calcified holococcolihs, <1µm across; typically organic scales with weak calcification | |
Taxonomy:
Farinacci & Howe catalog pages: tubeless [no catalog entry yet]
Short diagnosis: Holococcoliths without a tube, flat or cap-shaped
Search data:| Tags | LITHS: holococcolith, H: disk-like, H: septate, |
| Metrics | Lith size: 0->0µm; Sources: |
Geological Range:
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): within Gelasian Stage (1.81-2.59Ma, base in Gelasian stage). Data source: Total of range of species in this database
Plot of occurrence data:
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.References:
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tubeless compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 26-9-2017
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