Globorotalia flexuosa

Taxonomy

Catalog entries: Pulvinulina tumida flexuosa

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.

Description

Diagnostic characters:

Biogeography and Palaeobiology

Geographic distribution

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.

Biostratigraphic distribution

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:

• 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
• Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
• Taxon plotted: Globorotalia flexuosa, synonyms included - Globorotalia flexuosa; Globorotalia menardii flexuosa;
• See also space-time plot :: Samples map :: Parent: tumida lineage

Primary source for this page: Kennett & Srinivasan 1983, p.158

Globorotalia flexuosa compiled by the pforams@mikrotax project team viewed: 26-4-2025 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=104101 Go to Archive.is to create a permanent copy of this page - citation notes

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