Catalog entries: Textilaria globigera
Type images:Distinguishing features:
Parent taxon (Bolivina variabilis):
This taxon: Rugose test, with globose chambers.
Character matrix
test outline: | Triangular | chamber arrangement: | Biserial | edge view: | Compressed | aperture: | Interiomarginal |
sp chamber shape: | Globular | coiling axis: | N/A | periphery: | N/A | aperture border: | Thin flange |
umb chbr shape: | Globular | umbilicus: | N/A | periph margin shape: | Broadly rounded | accessory apertures: | None |
spiral sutures: | Moderately depressed | umb depth: | N/A | wall texture: | Reticulate | shell porosity: | Microperforate: <1µm |
umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 2.0-2.0 | N.B. These characters are used for advanced search. N/A - not applicable |
Distinguished from St. tokelauae, a Pliocene-Quaternary form, by its globose chambers and distinctly rugose test surface. St. tokelauae probably evolved from St. globigerum during the Early Pliocene. St. latum Bronnimann and Resig and St. pristinum Brönnimann and Resig are closely related. [Kennett & Srinivasan 1983]
Geographic distribution: Tropical to warm subtropical. [Kennett & Srinivasan 1983]
Phylogenetic relations:
Molecular Genotypes recognised (data from PFR2 database, June 2017), one genotype only from 19 sequences. References: Darling et al. 2009; Seears et al. 2012.
Most likely ancestor: Streptochilus latum - at confidence level 2 (out of 5). Data source: Resig 1989, fig. 2.
Likely descendants: Streptochilus globulosum;
plot with descendants
Geological Range:
Notes: Kennett & Srinivasan 1983 give a much earlier FAD of N14 for the species, than Resig 1989 (N17B) but they may have used a broader species concept. They also gave a LAD of N19, which is contradicted by plankton records of the species.
Last occurrence (top): Extant. Data source: present in the plankton (Darling et al. 2009)
First occurrence (base): within N17b zone (5.72-6.60Ma, base in Messinian stage). Data source: Resig 1989
Plot of occurrence data:
Primary source for this page: Kennett & Srinivasan 1983, p.21
Darling, K. F., Thomas, E., Kasemann, S. A., Seears, H. A., Smart, C. W. & Wade, C. M. (2009). Surviving mass extinction by bridging the benthic/planktic divide. Proceedings of the National Academy of Sciences, USA. 106: 12629-12633. gs Kennett, J. P. & Srinivasan, M. S. (1983). Neogene Planktonic Foraminifera. Hutchinson Ross Publishing Co., Stroudsburg, Pennsylvania. 1-265. gs Miranda-Martinez, A. Y., Carreño, A. L. & McDougall, K. (2017). The Neogene genus Streptochilus (Brönnimann and Resig, 1971) from the Gulf of California. Marine Micropaleontology. 132: 35-52. gs Resig, J. M. (1989). Stratigraphic distribution of late Neogene species of the planktonic foraminifer Streptochilus in the Indo-Pacific. Micropaleontology. 35(49-62): -. gs Schwager, C. (1866). Fossile Foraminiferen von Kar Nikobar, Reise der Oesterreichischen Fregatte Novara um Erde in den Jahren 1857, 1858, 1859 unten den Befehlen des Commodore B. Von Wuellerstorf-Urbair. Geologischer Theil, Geologische Beobachtung no. 2, Palaeontologische Mittheilung. 2: 187-268. gs V O Seears, H. A., Darling, K. F. & Wade, C. M. (2012). Ecological partitioning and diversity in tropical planktonic foraminifera. BMC Evolutionary Biology. 12(54): 1-15. gs V OReferences:
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Streptochilus globigerum compiled by the pforams@mikrotax project team viewed: 13-8-2022
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