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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)

Geological Time Data
Geological Time Periods: 
NN6
Eocene
Biblio Reference: 
Young, JR.  1998.  Neogene. Calcareous nannofossil biostratigraphy. :225-265.
Notes on occurrence information: 

First occurrence from Perch-Nielsen 1985

Scratchpads developed and conceived by: Vince Smith, Simon Rycroft, Dave Roberts, Ben Scott...