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Clausicoccus fenestratus

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Cenozoic Taxa

Clausicoccus Prins, 1979

Edited by Lyndsey on Thu, 10/03/2011 - 15:30

Clausicoccus Prins, 1979

Description: Coccolith rim structure similar to that of Coccolithus, but with a perforate plate covering the central area on the distal side. Centro-distal cycle (bright in XPL) may be narrow or reduced.

Remarks:

Type species: Clausicoccus fenestratus (Deflandre & Fert, 1954) Prins, 1979. [Discolithus]

Geological Time Data
Geological Time Periods: 
Miocene
Paleogene
Biblio Reference: 
Perch-Nielsen, K.  1985.  Cenozoic calcareous nannofossils. Plankton Stratigraphy. 1. Planktic foraminifera, calcareous nannofossils and calpionellids:427-554.
Notes on occurrence information: 
Predominantly Paleogene genus, but C. fenestratus continues into the Miocene

Clausicoccus fenestratus

Edited by Jeremy Young on Wed, 09/03/2011 - 15:20

Clausicoccus fenestratus (Deflandre and Fert, 1954) Prins, 1979 [Discolithus]

Description: Typical medium sized Clausicoccus species.

Remarks:

Size: 4.5-7µm long.

Original description:

Cat040181 copy.jpgCat040182 copy.jpg

Cl fenestratus CP 4-6fenestratus.JPG 4-7fenestratus.JPG 4-8fenestratus.JPG

Geological Time Data
Geological Time Periods: 
NN1
Paleogene
Biblio Reference: 
Young, JR.  1998.  Neogene. Calcareous nannofossil biostratigraphy. :225-265.

Hughesius

Edited by Lyndsey on Tue, 01/03/2011 - 11:57

Genus Hughesius Varol, 1989

Description: Placolith coccoliths showing low birefringence with central area filled by 2 to 4 plates, without obvious perforations.

Remarks:  There appears to be a lineage extending from Clausicoccus fenestratus via H. tasmaniae to H. gizoensis, involving size decrease and reduction of the R-units. H. tasmaniae is very similar to Clausicoccus and essentially is Clausicoccus without prominent perforations, H. gizoensis seems to have a simpler shield structure, possibly as a result of the smaller size.

Type species: H. gizoensis Varol 1989 

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