Daughter taxa (time control age-window is: 0-800Ma)![]() | Granddaughter taxa | ||||
Sphaerocalyptra dimorphic BCs conical, may have large openings, CFCs higher | S. quadridentata S. adenensis S. dermitzakii S. youngii S. sp. 1 S. sp. 2 S. sp. 3 S. sp. 4 S. sp. 5 S. sp. 6 S. sp. Y S. sp. | ||||
Anthosphaera fried egg shape, dimorphic (CFCs with large leaf-like process) | |||||
![]() | fried egg monomorphic BCs with flat rim and central protrusion, no marginal perforations, CFCs similar to BCs | ||||
flat dimorphic BCs disks, may have ridge CFCs with transverse ridge of bridge | |||||
flat (coccolithaceae HOLs) Liths are planar disks, variable ultrastructure. Cocospheres monomorphic. The species were formerly in Crystallolithus | C. leptoporus subsp. leptoporus HOL C. pelagicus subsp. braarudii HOL C. pelagicus subsp. pelagicus HOL | ||||
flat trapezoidal liths similar to and associated with Florisphaera | |||||
tubeless-minute Lightly calcified holococcoliths, <1µm across; typically organic scales with weak calcification |
Taxonomy:
Distinguishing features: Holococcoliths without a tube, flat or cap-shaped
Farinacci & Howe catalog pages: tubeless [no catalog entry yet]
Search data:Tags | LITHS: |
Metrics | Lith size: 0->0µm; |
Geological Range:
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): at base of Gelasian Stage (0% up, 2.6Ma, in Gelasian stage). Data source: Total of range of species in this database
Plot of occurrence data:
![]() |
tubeless compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 7-3-2021
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1444 Go to Archive.is to create a permanent copy of this page - citation notes |