Daughter taxa (time control age-window is: 0-800Ma) | Granddaughter taxa | ||||
Alisphaeraceae Heterococcoliths asymetric, arranged in meridional rows on coccosphere; V-unit forms flange, R-unit basal. Also nannolith phase "Polycrater" with quadrate aragonitic liths. | |||||
Papposphaeraceae Narrow-rimmed muroliths, mostly with prominent central structures. | Papposphaera Pappomonas Balaniger Formonsella Quaternariella Ventimolina Wigwamma Pseudowigwamma Kataspinifera Picarola Vexillarius Pocillithus | ||||
Umbellosphaeraceae Placolith-like with distal shield much larger than proximal, predominantly formed from R-units, V-units vestigial. | |||||
narrow rimmed placoliths Diverse group of coccoliths with narow placolith rims and variable central structures, usually showing four-fold symmetry. | |||||
Coccolith genera inc sed Heterococcolith genera which cannot be assigned to any family | Aliculosphaera Biantholithus Camuralithus Centumgemina Craterolithus Ellipsolithus Gladiolithus Ilselithina Leesella Luminocanthus Pedinocyclus Petasus | ||||
Unidentified heterococcoliths Specimens which cannot be assigned to established taxa |
Taxonomy:
Distinguishing features:
Parent taxon (ntax_cenozoic): Extant coccolithophores and Cenozoic calcareous nannofossils - Mesozoic nannofossils are in a separate module
This taxon: 2N: Various heterococcolith groups not obviously related to the well-defined orders
N: mostly unknown
Farinacci & Howe catalog pages:
Search data:
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 NP1 zone (65.47-66.04Ma, base in Danian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
Young, J. R. & Bown, P. R. (1997). Cenozoic calcareous nannoplankton classification. Journal of Nannoplankton Research. 19(1): 36-47. gs References:
Coccolith families inc sed compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 15-12-2024
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=311 Go to Archive.is to create a permanent copy of this page - citation notes |
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