Daughter taxa (time control age-window is: 0-800Ma)![]() | Granddaughter taxa | ||||
Calicasphaera Chalice-shaped coccoliths. Monomorphic | Calicasphaera bipora Calicasphaera blokii Calicasphaera concava Calicasphaera diconstricta Calicasphaera sp. | ||||
Papposphaera HOL Tower-like holococcoliths formed from hexagonal crystallite groups. | Papposphaera arctica HOL Papposphaera polybotrys HOL Papposphaera sagittifera HOL Papposphaera sarion HOL Papposphaera sp. 2 (Turrisphaera phase) Papposphaera sp. 3 (Turrisphaera phase) Papposphaera sp. HOL | ||||
![]() | Trigonaspis 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. | Pappomonas borealis HOL Trigonaspis melvillea Trigonaspis minutissima Pappomonas garrisonii HOL Trigonaspis sp. |
Taxonomy:
Distinguishing features:
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]
Morphology:
Size:
Ecology & Biogeography
Biology & life-cycles
Phylogenetic relations
: hollow, |
Lith size: 0->0µm; |
Geological Range:
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:
![]() |
open-tube compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 8-2-2023
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=960 Go to Archive.is to create a permanent copy of this page - citation notes |
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