|Daughter taxa (time control age-window is: 0-800Ma)||Granddaughter taxa|
Chalice-shaped coccoliths. Monomorphic
Tower-like holococcoliths formed from hexagonal crystallite groups.
Holococcoliths formed of triangular crystallite groups (ca. 0.15 µm across), each composed of three (?hexagonal) sub-units.
Dimorphic CFCs tower-like, BCs simple disks.
Parent taxon (Holococcoliths): Haploid life-cycle stages, with liths formed of numerous rhombohedral microcrystals
This taxon: Holococcoliths with tube, open distally (or cover recessed)
Farinacci & Howe catalog pages: open-tube [no catalog entry yet]
|Metrics||Lith size: 0->0µm;|
Last occurrence (top): Extant. Data source: Total of range of species in this database
First occurrence (base): at top of No known fossil record modern (100% up, 0Ma, in "Holocene" stage). Data source: Total of range of species in this database
Plot of occurrence data:
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