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Helicosphaera wallichii

Edited by Jeremy Young on Wed, 09/03/2011 - 18:32

Helicosphaera wallichii (Lohmann, 1902) Okada & McIntrye, 1977 [Coccosphaera]

Description: Like H. carteri but central-area with inclined pores.

Remarks: Separation of H. wallichii from H. carteri at species level was long doubted but has been verified by culture and molecular genetic studies (Geisen et al. 2004).

Original description:

Coccolithophora wallichi 100380.jpgCoccolithophora wallichi 100381.jpg

Synonym: H. carteri var. wallichii

Geological Time Data
Geological Time Periods: 
NN21
NN9
Biblio Reference: 
Young, JR.  1998.  Neogene. Calcareous nannofossil biostratigraphy. :225-265.

Comments

Tue, 08/05/2012 - 17:13 — jkell

Base of H. wallichii

Both here and in the black book the base is listed as NN9, but the link in the Neogene menu says NN ?11 and the range chart in the black book has it just into NN10b. I was wondering if anyone has any opinions or personal experience as to what the base of this species is?

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