Distinguishing features:
Parent taxon (Alisphaera): Coccoliths placolith-like, with asymmetrical distal flange
This taxon: Like A. spatula but varimorphic, many coccoliths lack the spine. Teeth well-developed, and large nodules and at the ends of the central area.
Farinacci & Howe catalog pages: Alisphaera bidentata
Search data:
| Lith size: 1.3->2µm; Coccosphere size: 8->12µm; Data source notes: original description, with some extension |
Geological Range:
Last occurrence (top): Extant. Data source:
First occurrence (base): within no known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source:
Plot of occurrence data:
Malinverno, E., Leoni , B. & Galli, P. (2022). Coccolithophore assemblages and a new species of Alisphaera from the Faafu Atoll, Maldives, Indian Ocean. Marine Micropaleontology. 172(102110): 1-16. gsReferences:

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Alisphaera bidentata compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 13-12-2025
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1791 Go to Archive.is to create a permanent copy of this page - citation notes |
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