Catalog entries: Pulvinulina tumida flexuosa
Type images:Distinguishing features:
Parent taxon (tumida lineage): G. lenguaensis - merotumida - tumida - flexuosa lineage
This taxon: Like G. tumida, but anterior part of final chamber sharply bent toward the umbilicus.
Morphology:
Wall type:
Character matrix
test outline: | Ovate | chamber arrangement: | Trochospiral | edge view: | Inequally biconvex | aperture: | Umbilical-extraumbilical |
sp chamber shape: | Crescentic | coiling axis: | Low | periphery: | Single keel | aperture border: | Thin flange |
umb chbr shape: | Subtriangular | umbilicus: | Narrow | periph margin shape: | Subangular | accessory apertures: | None |
spiral sutures: | Raised | umb depth: | Shallow | wall texture: | Smooth | shell porosity: | Macroperforate: >2.5µm |
umbilical or test sutures: | Weakly depressed | final-whorl chambers: | 6.0-7.0 | N.B. These characters are used for advanced search. N/A - not applicable |
[SCOR WG138]
Geographic distribution
Isotope paleobiology
Phylogenetic relations
Gr. (Gr.) tumida flexuosa differs from Globorotalia menardii neoflexuosa Srinivasan, Kennett, and Be in having narrower and more elliptical outline, less lobulate periphery, and a heavy keel. [Kennett & Srinivasan 1983]
Most likely ancestor: Globorotalia tumida - at confidence level 3 (out of 5). Data source: Kennett & Srinivasan 1983, fig 17;Stewart 2003 fig. 6.10; Aze et al. 2011, appendix 5.
Geological Range:
Notes: Upper part of Zone N18 to N21 (latest Miocene to Late Pliocene). [Kennett & Srinivasan 1983]
NB This range given by Kennett & Srinivasan is competely different to the end Pleistocene range given by Wade et al. (2011), based on Berggren et al. 1995 and ultimately Joyce et al. (1990).
Bolli & Saunders (1985, p.176) note that there is a late Pleistocene interval "largely characterized by the presence of Globorotalia tumida flexuosa as has been observed in numerous sections from the low latitude Atlantic realm. However, this subspecies is apparently controlled by environment rather than time (in low latitude Pacific sections it is present for only a brief interval in the Early Pliocene, as is the case in well Bodjonegoro-1. Java)."
Last occurrence (top): near top of PT1b subzone (89% up, 0.1Ma, in Tarantian stage). Data source: Wade et al. (2011), additional event; position within zone determined by linear interpolation from data in table 1 of Wade et al. (2011).
First occurrence (base): in lower part of PT1b subzone (34% up, 0.4Ma, in Ionian stage). Data source: Wade et al. (2011), additional event; position within zone determined by linear interpolation from data in table 1 of Wade et al. (2011).
Plot of occurrence data:
Primary source for this page: Kennett & Srinivasan 1983, p.158
Aze, T. et al. (2011). A phylogeny of Cenozoic macroperforate planktonic foraminifera from fossil data. Biological Reviews. 86: 900-927. gs Bé, A. W. H. & McIntyre, A. (1970). Globorotalia menardii flexuosa (Koch): An 'extinct' foraminiferal subspecies living in the northern Indian Ocean. Deep-Sea Research. 17: 595-601. gs Berggren, W. A. et al. (1995a). Late Neogene chronology: New perspectives in high-resolution stratigraphy. Geological Society of America, Bulletin. 107(11): 1272-1287. gs Brummer, G-J. A. & Kucera, M. (2022). Taxonomic review of living planktonic foraminifera. Journal of Micropalaeontology. 41: 29-74. gs Joyce, J. E., Tjalsma, L. R. C. & Prutzman, J. M. (1990). High-resolution planktic stable isotope record and spectral analysis for the last 5.35 m.y: Ocean Drilling Program site 625 Northeast Gulf of Mexico. Paleoceanography. 5(4): 507-529. gs Kennett, J. P. & Srinivasan, M. S. (1983). Neogene Planktonic Foraminifera. Hutchinson Ross Publishing Co., Stroudsburg, Pennsylvania. 1-265. gs Koch, R. (1923). Die jungtertiare Foraminiferenfauna von Kabu (Res. Surbaja Java). Eclogae Geologicae Helvetiae. 18: 342-357. gs Stewart, D. R. M. I. (2003). Evolution of Neogene globorotaliid foraminifera and Miocene climate change. PhD thesis, Bristol University. 1-269. gs Wade, B. S., Pearson, P. N., Berggren, W. A. & Pälike, H. (2011). Review and revision of Cenozoic tropical planktonic foraminiferal biostratigraphy and calibration to the geomagnetic polarity and astronomical time scale. Earth-Science Reviews. 104: 111-142. gsReferences:
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Globorotalia flexuosa compiled by the pforams@mikrotax project team viewed: 7-6-2023
Short stables page link: https://mikrotax.org/pforams/index.php?id=104101 Go to Archive.is to create a permanent copy of this page - citation notes |