Distinguishing features: Coccoliths formed of minute (ca 0.1µm) rhombohedral micro-crystals. Often a life-cycle stage with heterococcolith counterpart(s).
| Daughter taxa (blue => in age window 0-300Ma) | Granddaughter taxa | ||||
| | | | The four most commonly recorded genera | |
| | | | Less common genera | |
Taxonomy:
The subdivision here into common and rarer genera ismade purelyto highlight those genera which are worth paying attention to first
Farinacci & Howe catalog pages: Holococcoliths [no catalog entry yet]
Distinguishing features: Coccoliths formed of minute (ca 0.1µm) rhombohedral micro-crystals. Often a life-cycle stage with heterococcolith counterpart(s).
Ecology & Biogeography: Holococcoliths can occur in any environments at the present day but high abundance and diversity of holococcoliths is considered typical of oligotrophic environments.
Geological Range:
Last occurrence (top): within Thanetian Stage (55.96-59.24Ma, top in Thanetian stage). Data source: Total of range of species in this database
First occurrence (base): within Toarcian Stage (174.15-182.70Ma, base in Toarcian 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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Holococcoliths compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-6-2018
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