Nannotax3 - ntax_cenozoic - Tetralithoides


Classification: ntax_cenozoic -> Coccolith families inc sed -> narrow rimmed placoliths -> Tetralithoides
Sister taxa: C. sphaeroidea HET, Navilithus, Placorhombus, Tetralithoides, Turrilithus

Daughter taxa (time control age-window is: 0-800Ma)
Tetralithoides quadrilaminata
Coccoliths elliptical with narrow placolith rim surrounding central-area filled by four (rarely three) plates
Tetralithoides symeonidesii
Elliptical with moderately narrow rim surrounding central-area filled by four plates.
Tetralithoides sp.


Citation: Tetralithoides Theodoridis, 1984 emend. Jordan et al., 1993
Rank: Genus
Type species: Tetralithoides symeonidesi Theodoridis 1984

Distinguishing features:
Parent taxon (narrow rimmed placoliths): Diverse group of coccoliths with narow placolith rims and variable central structures, usually showing four-fold symmetry.
This taxon: Coccoliths elliptical narrow-rimmed placoliths with four plates in central area

Farinacci & Howe catalog pages: Tetralithoides + *



Search data:
LITHS: placolith, elliptical, CA: ca_disjunct, plate, closed,
CSPH: equant, monomorphic, CROSS-POLARS: rim-unicyclic, V-prominent, R-prominent,
Lith size: 4->7.5µm; Coccosphere size: 15->25µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): Extant. Data source: Total of range of species in this database
First occurrence (base): in upper part of Thanetian Stage (62% up, 57.2Ma, in Thanetian stage). Data source: Total of range of species in this database

Plot of occurrence data:


Jordan, R. W., Kleijne, A. & Heimdal, B. R. (1993). Proposed changes to the classification system of coccolithophorids. III. INA Newsletter. 15(1): 18-22. gs V O

Theodoridis, S. (1984). Calcareous nannofossil biostratigraphy of the Miocene and revision of the helicoliths and discoasters. Utrecht Micropaleontological Bulletin. 32: 1-271. gs O


Tetralithoides compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 27-9-2022

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Short stable page link: Go to to create a permanent copy of this page - citation notes

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