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Coronocyclus
Cenozoic Taxa
Coronocyclus Hay et al., 1966
Submitted by Jeremy Young on Fri, 06/02/2009 - 13:13- Login or register to post comments
- 98 reads
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Neogene: Coronocyclus
Paleogene: Coronocyclus
Coronocyclus nitescens (Kamptner 1963) Bramlette & Wilcoxon 1967
Submitted by Jeremy Young on Fri, 06/02/2009 - 13:13- Login or register to post comments
- 146 reads
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Neogene: Coronocyclus; Coronocyclus nitescens
Paleogene: Coronocyclus nitescens
Coronocyclus nitescens
Edited by Jeremy Young on Wed, 09/03/2011 - 16:31
Coronocyclus nitescens (Kamptner, 1963) Bramlette and Wilcoxon, 1967 [Umbilicosphaera]
Description: Ring-shaped coccoliths with open central-area. No clear shield development, spines on distal side. Strongly birefringent.
Remarks:
Original description:
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Synonyms:
- Coronocyclus serratus Hay, Mohler and Wade, 1966
Variant: Elliptical forms, with narrow rims, occur in NN5-6.
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- 830 reads
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Neogene: Coronocyclus; Coronocyclus nitescens; Umbilicosphaera
Paleogene: Coronocyclus nitescens
Coronocyclus
Edited by Jeremy Young on Wed, 09/03/2011 - 16:29 Genus Coronocyclus Hay Mohler & Wade 1966
Description: Ring shaped coccoliths without discrete shields. Bright between cross-polars. Formed of two cycles of elements. An inner (usually spinose) cycle of R-units is imbricate and wraps around the outer cycle of non-imbricate V-units.
Remarks: The possible interpretation of this coccolith morphology is that it evolved from a Coccolithus type placolith by reduction of the shields.
Type species: Coronocyclus serratus Hay Mohler & Wade 1966 (subjective junior synonym of C. nitescens Kamptner 1963)
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- 1011 reads
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Neogene: Coronocyclus
Coccolithaceae
Edited by Jeremy Young on Wed, 03/02/2010 - 00:12FAMILY COCCOLITHACEAE Poche, 1913 emend Young & Bown 1997
Description: Coccoliths are placoliths with rim structure similar to Coccolithus: V-unit forms both distal shield and lower cycle of central-area; R-unit forms both proximal shield and upper cycle of central-area.
Genera included:
-
Remarks:
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- 3498 reads
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Neogene: Clausicoccus; Coccolithaceae; Coccolithus; Coronocyclus; Cruciplacolithus; Hughesius; Solidopons
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