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Calciosolenia brasiliensis

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Cenozoic Taxa

Calciosolenia fossilis (Deflandre in Deflandre & Fert, 1954) Bown in Kennedy et al., 2000

Edited by Lyndsey on Fri, 11/03/2011 - 16:55

Calciosolenia fossilis (Deflandre in Deflandre & Fert, 1954) Bown in Kennedy et al., 2000

Description: Elongate, narrow scapholiths. Morphologically comparable with the extant Calciosolenia brasiliensis (Lohmann 1919), but fossil specimens have tended to be classified as Calciosolenia (or Scapholithus) fossilis.

Remarks: The extant species show considerable varimorphism across their coccospheres and there is evidence of similar variability in the fossil forms, when found as collapsed coccospheres.


Geological Time Data
Geological Time Periods: 
Holocene
Hauterivian
Biblio Reference: 
Varol, O.  1998.  Palaeogene. Calcareous nannofossil biostratigraphy. :200-224.
Notes on occurrence information: 
The beginning of this species' range is, more precisely, Lower Cretaceous (Lower Hautervian).

Calciosolenia brasiliensis

Edited by Lyndsey on Tue, 01/03/2011 - 17:53

Calciosolenia brasiliensis (Lohmann 1919) Young et al. 2003. [Cylindrotheca]

Description: Coccosphere monomorphic, slender; ends tapered with many very elongate liths, but no spines. Liths have very regular bars, which offset neatly to form median ridge.

 Calc_bras_134-45.JPGCalc_bras_133-25.JPG

Remarks: Liths typically larger than those of C. murrayi, 3-7 µm long.

Usually recorded as Anoplosolenia brasiliensis in older literature, see discussion of genus.

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