Daughter taxa (time control age-window is: 0-800Ma) | Granddaughter taxa | ||||
Blackites amplus Spineless Paleogene Blackites described from SEM image, but subsequently paired with LM images of circular coccoliths that are predominantly dark with a brighter centre. | |||||
Blackites friedrichii | |||||
Blackites furvus Medium-sized, subcircular-circular coccoliths with broad, low-birefringence shields crossed by strongly curving extinction lines. The central area is narrow or closed and is typically marked by a dark subcircular process. | |||||
Blackites sp. - bases |
Taxonomy:
Distinguishing features:
Parent taxon (Blackites): Coccoliths process-bearing with complex base including outer rim, radial lath and lamellar cycles
This taxon: Spine absent or very small
Farinacci & Howe catalog pages:
Size:
Lith size: 4->6µm; |
Geological Range:
Last occurrence (top): at top of NP21 zone (100% up, 32.9Ma, in Rupelian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within NP14 zone (46.29-49.11Ma, base in Ypresian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
B. amplus group compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 20-9-2024
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=57 Go to Archive.is to create a permanent copy of this page - citation notes |
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