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Coccolithophores


Ancestry: Coccolithophores
Sister taxa: Coccolithophores  Farinacci  JR271-sampling methods  Mesozoic  non_cocco  unsorted  

Daughter taxa (blue => in age window 0-300Ma)Granddaughter taxa
Loading...Loading...Loading...Loading... Motile phases with vestigial haptonema. Heterococcoliths mostly placoliths with R-unit dominant

Loading...Loading...Loading...Loading... Mostly placolith heterococcoliths, with V-unit forming the distal shield; R-unit the proximal shield.

Loading...Loading...Loading...Loading... Heterococcoliths with V-units forming upper/outer cycle of imbricated elements and R-units forming basal plate and central mass of irregular elements

Loading...Loading...Loading...Loading... Coccoliths with radial lath cycle of T-units, and disjunct, often complex, axial structure, coccospheres often polymorphic

Loading...Loading...Loading...Loading... Various heterococcolith groups not obviously related to the well-defined orders

Loading...Loading...Loading...Loading... Haploid life-cycle stages, with liths formed of numerous rhombohedral microcrystals

Loading...Loading...Loading...Loading... Radially symmetrical nannoliths formed from one to several separate cycles of elements that radiate from a common centre or axis.

Loading...Loading...Loading...Loading... Haptophytes forming calcareous structures not obviously homologous with either heterococcoliths or holococcoliths

Loading...Loading...Loading...Loading... Mesozoic taxa which occur in low abundances in the early Palaeogene.

Nomenclature:
Citation: Coccolithophores informal [overall group]

Geological Range:
Last occurrence (top): Recent (0.00Ma). Data source: present in the plankton (Young et al. 2003)
First occurrence (base): Early Triassic (252.16Ma). Data source: [JRY rough estimate]

References:

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. 


Nannotax3 - Coccolithophores - Coccolithophores by: Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 23-10-2014

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