Sphaeroidinellopsis kochi

Taxonomy

Catalog entries: Globigerina kochi, Sphaeroidinella rutschi, Sphaeroidinella multiloba, Globigerina grimsdalei

Distinguishing features:
Parent taxon (Sphaeroidinellopsis): trochospiral test, globular chambers, and a heavy, smooth, shiny cortex
This taxon: Like S. seminulina but somewhat compressed trochospiral test with >3 chambers in final whorl.

Description

Diagnostic characters:

Biogeography and Palaeobiology

Geographic distribution

Most likely ancestor: Sphaeroidinellopsis disjuncta - at confidence level 4 (out of 5). Data source: Fabbrini et al. 2021, fig 8.

Biostratigraphic distribution

Geological Range:
Last occurrence (top): near top of PL1 [Atl.] zone (87% up, 4.5Ma, in Zanclean 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): within N10 zone (13.77-14.24Ma, base in Langhian stage). Data source: Kennett & Srinivasan 1983

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: Sphaeroidinellopsis kochi, synonyms included - Sphaeroidinella kochi; Sphaeroidinella subdehiscens; Sphaeroidinellopsis kochi; Sphaeroidinellopsis multiloba; Sphaeroidinellopsis seminulina kochi; Sphaeroidinellopsis subdehiscens; Sphaeroidinellopsis subdehiscens subdehiscens;
• See also space-time plot :: Samples map :: Parent: Sphaeroidinellopsis

Primary source for this page: Kennett & Srinivasan 1983, p.210

Sphaeroidinellopsis kochi compiled by the pforams@mikrotax project team viewed: 22-5-2025 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=104217 Go to Archive.is to create a permanent copy of this page - citation notes

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