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Helicosphaera intermedia

Edited by Jeremy Young on Wed, 09/03/2011 - 18:28

Helicosphaera intermedia Martini, 1965

Description: Like H. carterae but central-area spanned by curved disjunct bar (i.e. the bar behaves as a discrete crystal unit)

Remarks: Also similar to H. euphratis, but there are discrete opening above and below the ba, whereas in H. euphratis the bar virtually fills the central area.

Original description:

Helicosphaera intermedia 050248.jpgHelicosphaera intermedia 050249.jpg

Geological Time Data
Geological Time Periods: 
NN12
NP21
Biblio Reference: 
Young, JR.  1998.  Neogene. Calcareous nannofossil biostratigraphy. :225-265.
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