Classification: ntax_cenozoic -> Holococcoliths -> tubeless -> Anthosphaera
Sister taxa: Sphaerocalyptra, Anthosphaera, fried egg monomorphic, flat dimorphic, flat (coccolithaceae HOLs), flat trapezoidal, tubeless-minute

Daughter taxa (time control age-window is: 0-800Ma)Granddaughter taxa
Syracosphaera marginiporata HOL
BCs minute (<1 µm) rounded protrusion typically with multiple openings, and well separated from the rim. CFCs arched.

Syracosphaera molischii HOL
BCs elliptical with low, rounded, protrusion; perforations barely visible

Anthosphaera lafourcadii
Like S. molischii HOL but BCs small, with irregular crystallites, CFC with low arch

Anthosphaera origami
Anthosphaera species with ornamented coccoliths; CFCs with ornamented blade ending in spine-like rows of crystallites. BCs with large perforations separated by radial rows of crystallites; concave distal surface with a flange and a central distally pointed triangle.

Anthosphaera periperforata
Like S. molischii HOL but with prominent, oblique perforations, often conical; CFCs with arched process

Anthosphaera sp. type C
BCs minute, 0.5-0.7µm, flattened

Anthosphaera sp.
Specimens which cannot be assigned to established species


Citation: Anthosphaera Kamptner, 1937
Rank: Genus
Type species: Anthosphaera fragaria Kamptner, 1937
Taxonomic discussion: The species taxonomy of Anthosphaera is not very well worked out, mainly because it is both rather rare and morphologically variable. The type species A. fragaria has been shown by Triantaphyllou et al. (2016) to be a life cycle phase of and junior synonym of Syracosphaera molischii. As in other similar cases it seems, however, preferable to leave the other species in Anthosphaera pending elucidation of their life-cycles.

Distinguishing features: fried egg shape, dimorphic (CFCs with large leaf-like process)

Farinacci & Howe catalog pages: Anthosphaera + *

BCs low flat domes with flat monolayer basal rim and central protrusion, often radial spokes between rim and protrusion. Thes have often been described as calyptroliths but they are rather atypical. Crystallites rather irregular, blocky.
CFCs with basal rim and monolayer leaf-like process (a variant on the helladolith theme, termed fragarioliths).
See Kleijne (1991) and Cros & Fortuño (2002) for more discussion.

Search data:
TagsLITHS: holococcolith, elliptical, CA: closed,
MetricsLith size: 0.4->1.8µm;
The morphological data given here can be used on the advanced search page. See also these notes

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:


Cros, L. & Fortuño, J. -M. (2002). Atlas of northwestern Mediterranean coccolithophores. Scientia Marina. 66: 1-186. gs V O

Kamptner, E. (1937b). Neue und bemerkenswerte Coccolithineen aus dem Mittelmeer. Archiv für Protistenkunde. 89: 279-316. gs

Kleijne, A. (1991). Holococcolithophorids from the Indian Ocean, Red Sea, Mediterranean Sea and North Atlantic Ocean. Marine Micropaleontology. 17: 1-76. gs

Triantaphyllou, M. et al. (2016). Coccolithophore combination coccospheres from the NE Mediterranean Sea: new evidence and taxonomic revisions. Micropaleontology. 61(6): 457-472. gs


Anthosphaera compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 20-4-2021

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