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Helicosphaera obliqua

Edited by Jeremy Young on Wed, 09/03/2011 - 18:37

Helicosphaera obliqua Bramlette and Wilcoxon, 1967

Description: Medium sized, sub-rectangular shape. Only weakly birefringent. Wing ends in spur, central-area with two prominent pores with inverse orientation.

Remarks: Differentiation from H. perch-nielseniae is rather subjective (comments welcome!)

Original description:

Helicosphaera obliqua 060442.jpg

Geological Time Data
Geological Time Periods: 
NN6
NP24
Biblio Reference: 
Young, JR.  1998.  Neogene. Calcareous nannofossil biostratigraphy. :225-265.
Scratchpads developed and conceived by: Vince Smith, Simon Rycroft, Dave Roberts, Ben Scott...