arrayname: original
Daughter taxa (time control age-window is: 0-800Ma)![]() | ||||
Placorhombus ziveriae striae on all four plates sub-parallel to coccolith width | ||||
Placorhombus sp. cf. ziveriae striae on end plates sub-parallel to coccolith length | ||||
Placorhombus sp. Specimens which cannot be assigned to established species |
Taxonomy:
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 rhombic narrow-rimmed placoliths with four plates in central area
Farinacci & Howe catalog pages: Placorhombus *
Search data:
LITHS: placolith, quadrate, CA: ca_disjunct, closed, plate, CSPH: tubular, monomorphic, |
Lith size: 1.6->2.4µm; Coccosphere size: 35->55µm; |
Geological Range:
Last occurrence (top): Extant. Data source: Total of ranges of the species in this database
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source: Total of ranges 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. S1: 1-132. gs References:
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Placorhombus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 21-4-2025
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1052 Go to Archive.is to create a permanent copy of this page - citation notes |
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