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Hughesius tasmaniae

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Cenozoic Taxa

Clausicoccus

Edited by Jeremy Young on Sat, 26/03/2011 - 12:04

Genus Clausicoccus Prins, 1979

Description: Placolith coccoliths with Coccolithus type shields and tube, but with a perforated plate covering the central area on the distal side.

Remarks: This is a common Late Palaeogene genus, many species of which have been described. These were asigned to various genera prior to description of Clausicoccus by Prins (1979). Only the single species C. fenestratus continues into the Miocene but this appears to give rise to Hughesius tasmaniae

Geological Time Data
Geological Time Periods: 
NN2
Paleocene
Biblio Reference: 
Young, JR.  1998.  Neogene. Calcareous nannofossil biostratigraphy. :225-265.

Hughesius tasmaniae

Edited by Lyndsey on Thu, 10/03/2011 - 11:03

Hughesius tasmaniae (Edwards and Perch-Nielsen, 1975) de Kaenel and Villa, 1996 [Ericsonia]

Description: Medium sized species of Hughesius (3-5μm long), with 4 plates in central-area.

Remarks: This species is intermediate between Clausicoccus fenestratus and Hughesius gizoensis, in terms of size, number of plates, and rim birefringence. It probably forms part of an evolutionary lineage between these species.

Original description:

Cat090274 copy.jpgCat090275 copy.jpg

5-22tasmaniae.JPG 5-24tasmaniae.JPG 5-23tasmaniae.JPG

Range: Palaeogene to NN9 (rare above NN3).

Synonym: Recorded as Hughesius sp. by Varol, 1989.

Geological Time Data
Geological Time Periods: 
NN9
Paleogene
Biblio Reference: 
Young, JR.  1998.  Neogene. Calcareous nannofossil biostratigraphy. :225-265.
Notes on occurrence information: 

Rare above NN3

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