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Coronocyclus

Tue, 01/01/2008 - 23:25 — Jeremy Young
coronocyclus_nitescens.jpg
Citation: 
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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