Taxonomy:
Distinguishing features:
Parent taxon (Zygodiscales): 2N: Heterococcoliths with V-units forming upper/outer cycle of imbricated elements and R-units forming basal plate and central mass of irregular elements. Usually motile
N: Form holococcoliths formed of single block
This taxon: Monomorphic or dimorphic; liths muroliths with perforate central area
Farinacci & Howe catalog pages: Pontosphaeraceae
Morphology:
Biology & life-cycles
Lith size: 5->25µm; |
Geological Range:
Last occurrence (top): Extant. Data source: Total of ranges of the species in this database
First occurrence (base): within NP5 zone (59.54-61.51Ma, base in Selandian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
Frada, M., Percopo, I., Young, J. R., Zingone, A., de Vargas, C. & Probert, I. (2009). First observations of heterococcolithophore-holococcolithophore life cycle combinations in the family Pontosphaeraceae (Calcihaptophycideae, Haptophyta). Marine Micropaleontology. 71(1): 20-27. gs Lemmermann, E. (1908). Flagellatae, Chlorophyceae, Coccosphaerales und Silicoflagellatae. In, Brandt, K. & Apstein, C. (eds) Nordisches Plankton. Botanischer Teil. Lipsius & Tischer, Kiel & Leipzig 1-40. gsReferences:
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Pontosphaeraceae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 19-2-2025
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1105 Go to Archive.is to create a permanent copy of this page - citation notes |
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