Streptochilus

NB TAXA WHICH ORIGINATE IN THE OLIGOCENE ARE NOT INCLUDED YET
Classification: pf_neogene -> Bolivinidae -> Streptochilus
Sister taxa: Streptochilus,
Daughter taxa (blue => in age window 0-300Ma)









Specimens which cannot be assigned to established species

Taxonomy

Citation: Streptochilus Bronniman & Resig 1971
Rank: genus
Type species: Bolivina tokelauae Boersma, 1969
Taxonomic discussion: Two groups of biserial planktonic foraminifera are known from the Cenozoic: Chiloguembelina in the Paleogene and Streptochilus in the Neogene. Streptochilus probably evolved from Chiloguembelina, which it resembles by infolding of the inner margin of the aperture (Text Fig. 6). Because of its minute size, the genus has largely been overlooked in studies of planktonic foraminiferal assemblages. [Kennett & Srinivasan 1983]

Catalog entries: Streptochilus;

Type images:

NB The short diagnoses are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus. They have initially been copied from the diagnostic characters/distinguishing features sections of the Eocene and Paleocene Atlases, they will be edited as the site is developed.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): within Aquitanian Stage (20.44-23.03Ma, base in Aquitanian stage). Data source: Total of range of species in this database

Plot of occurrence data:

Primary source for this page: Kennett & Srinivisan 1983, p.21

References:

Brönnimann, P. & Resig, J., (1971). A Neogene globigerinacean biochronologic time-scale of the southwestern Pacific. Deep Sea Drilling Project, 7(2): 1235-1469.


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Streptochilus compiled by the pforams@mikrotax project team viewed: 21-10-2017

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