NB TAXA WHICH ORIGINATE IN THE OLIGOCENE ARE NOT INCLUDED YET
Classification: pf_neogene -> Bolivinidae -> Streptochilus
Sister taxa: Streptochilus,
Citation: Streptochilus Bronniman & Resig 1971Rank: genusType species: Bolivina tokelauae Boersma, 1969Taxonomic 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]
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.
Biogeography and Palaeobiology
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): at base of Aquitanian Stage (0% up, 23Ma, in Aquitanian stage). Data source: Total of range of species in this database
Plot of occurrence data:
- Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
- Triangles indicate an event for which a precise placement has been suggested
- Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Bolivinidae
Primary source for this page: Kennett & Srinivasan 1983, p.21
Brönnimann, P. & Resig, J., (1971). A Neogene globigerinacean biochronologic time-scale of the southwestern Pacific. Deep Sea Drilling Project, 7(2): 1235-1469.
Streptochilus compiled by the pforams@mikrotax project team viewed: 22-3-2018
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