pforams@mikrotax - Streptochilus globulosum pforams@mikrotax - Streptochilus globulosum

Streptochilus globulosum

Classification: pf_cenozoic -> Benthic origins -> Bolivina -> Bolivina variabilis -> Streptochilus globulosum
Sister taxa: S. globulosum, S. globigerum


Citation: Streptochilus globulosum (Cushman, 1933)
Rank: species
Basionym: Bolivina globulosa

Catalog entries: Bolivina globulosa, Bolivina tokelauae

Type images:

Distinguishing features:
Parent taxon (Bolivina variabilis):
This taxon: Smooth test, chambers not inflated

NB These concise distinguishing features statements are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus.
They are being edited as the site is developed and comments on them are especially welcome.


Character matrix
test outline:Subtriangularchamber arrangement:Biserialedge view:Compressedaperture:Interiomarginal
sp chamber shape:Globularcoiling axis:N/Aperiphery:N/Aaperture border:Thin flange
umb chbr shape:Globularumbilicus:N/Aperiph margin shape:Narrowly roundedaccessory apertures:None
spiral sutures:Moderately depressedumb depth:N/Awall texture:Smoothshell porosity:Microperforate: <1µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:2.0-2.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology

Geographic distribution

Most likely ancestor: Streptochilus globigerum - at confidence level 2 (out of 5). Data source: Resig 1989, fig. 2.

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant. Data source: Resig 1989
First occurrence (base): within N20 zone (3.10-4.37Ma, base in Zanclean stage). Data source: Resig 1989

Plot of occurrence data:


Cushman, J. A. (1933d). Some new Recent foraminifera from the Tropical Pacific. Contributions from the Cushman Laboratory for Foraminiferal Research. 9(4): 77-95. gs V O

Resig, J. M. (1989). Stratigraphic distribution of late Neogene species of the planktonic foraminifer Streptochilus in the Indo-Pacific. Micropaleontology. 35(49-62): -. gs


Streptochilus globulosum compiled by the pforams@mikrotax project team viewed: 25-3-2023

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