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Helicosphaera inversa

Edited by Jeremy Young on Wed, 09/03/2011 - 18:29

Helicosphaera inversa (Gartner, 1980) Theodoridis, 1984 [Helicopontosphaera]

Description: Like H. carteri but with large pores separated by prominent conjunct sub-horizontal bar usually with inverse orientation.

Remarks:

Range: NN19 to 21 (LAD low in NN21).

Original description:

Helicopontosphaera inversa 130142.jpgHelicopontosphaera inversa 130143.jpg

Geological Time Data
Geological Time Periods: 
NN21
NN19
Biblio Reference: 
Young, JR.  1998.  Neogene. Calcareous nannofossil biostratigraphy. :225-265.
Scratchpads developed and conceived by: Vince Smith, Simon Rycroft, Dave Roberts, Ben Scott...