Chiloguembelina morsei

Taxonomy

Catalog entries: Guembelina morsei

Distinguishing features:
Parent taxon (Chiloguembelina): Test subtriangular in outline, biserial throughout or rarely with multiserial final chambers; aperture a simple arched opening at base of the final chamber, with a narrow rim on one margin and a broad collar or flange directed toward one of the flat sides of the test, lacking an infolded margin or internal plate. Rarely with multiple apertures.
This taxon: The test biserial throughout. Sutures are distinct and depressed, initially sub-horizontal, oblique between later chambers. Successive chambers overlap, particularly in late ontogeny. Initial chambers sub-spherical, later chambers broader Wall surface with numerous small pustules, especially on early chambers. Aperture with a single distinct lateral flange.

Description

Biogeography and Palaeobiology

Geographic distribution

Most likely ancestor: Woodringina hornerstownensis - at confidence level 3 (out of 5). Data source: Olsson et al. 1999 fig6, Koutsoukos 2014, fig16.
Likely descendants: Chiloguembelina midwayensis; plot with descendants

Biostratigraphic distribution

Geological Range:
Notes: Zone P a (D'Hondt, 1991) to Subzone Pic (Boersma, 1984b). [Olsson et al. 1999]
Last occurrence (top): within P1c subzone (62.60-63.90Ma, top in Danian stage). Data source: Olsson et al. 1999
First occurrence (base): within Pa zone (65.72-66.00Ma, base in Danian stage). Data source: Olsson et al. 1999

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: Chiloguembelina morsei, synonyms included - Chiloguembelina morsei;
• See also space-time plot :: Samples map :: Parent: Chiloguembelina

Primary source for this page: Olsson et al. 1999 - Atlas of Paleocene Planktonic Foraminifera, p. 91

Chiloguembelina morsei compiled by the pforams@mikrotax project team viewed: 6-10-2024 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=100057 Go to Archive.is to create a permanent copy of this page - citation notes

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