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Gephyrocapsa ericsonii

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Cenozoic Taxa

small Gephyrocapsa

Edited by Jeremy Young on Thu, 19/05/2011 - 17:04

small Gephyrocapsa

Description: Gephyrocapsa coccolith <3µm long.

Remarks: Small Gephyrocapsa coccoliths show diverse morphologies and probably include many species. It is not practical to identify them by light microscopy so they are typically simply refered to the informal category "small Gephyrocapsa". Alternatively the names G. aperta, or in the Late Quaternary G. ericsonii are often used in the same sense.

sGeph192-01.JPGsGeph201 (471-0) 16NN14-15.JPG

 

Described species: Small Gephyrocapsa species which have been decribed in the literature include

Extant species

  • Gephyrocapsa ericsonii McIntyre & Bé 1967
  • Gephyrocapsa ornata Heimdal, 1973

Fossil species

  • Gephyrocapsa aperta Kamptner, 1963
  • Gephyrocapsa duoalatus (Martini, 1981) Martini, 1993
  • Gephyrocapsa mediterranea Pirini Radrizzani & Valleri, 1977
  • Gephyrocapsa pelta Samtleben, 1980
  • Gephyrocapsa protohuxleyi Gartner, 1977
  • Gephyrocapsa rota Samtleben, 1980
  • Gephyrocapsa sinuosa Hay & Beaudry, 1973
  • Gephyrocapsa theyeri Pujos 1987
Geological Time Data
Geological Time Periods: 
NN21
NN14
Biblio Reference: 
Young, JR.  1998.  Neogene. Calcareous nannofossil biostratigraphy. :225-265.
Notes on occurrence information: 

Small Gephyrocapsa specimens are usually common in the mid Pliocene (around the NN15/16 boundary) and throughout the Quaternary, but are scarce through much of the Late Pliocene.

Gephyrocapsa ericsonii

Edited by Jeremy Young on Wed, 09/03/2011 - 17:17

Gephyrocapsa ericsonii McIntyre & Bé 1967

Description: Very small species of Gephyrocapsa. Coccoliths with low to intermediate angle bridge, wide central area, thin bridge. Specimens often show slits between distal shield elements. These morphotypes have sometimes been referred to a separate species, G. protohuxleyi (McIntyre 1970), but they intergrade with normal G. ericsonii.

Remarks: In the fossil record Gephyrocapsa specimens <3µm long are usually simply identified as "small Gephyrocapsa"

Size: Coccospheres, 3 to 5 µm; coccoliths, 1.4 to 2.3 µm long.

Original description:

Gephyrocapsa ericsonii 040095.jpgGephyrocapsa ericsonii 040096.jpg

G. ericsonii (modern)G_eric_103-22.JPGG. ericsonii - coccospheres from the plankton

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