pforams@mikrotax - Hendersonites carinatus

Hendersonites carinatus


Classification: pf_mesozoic -> Heterohelicidae -> Hendersonites -> Hendersonites carinatus
Sister taxa: H. carinatus, H. sp.

Taxonomy

Citation: Hendersonites carinatus (Cushman, 1938)
Rank: Species
Basionym: Guembelina carinata Cushman, 1938
Taxonomic discussion: Placed in Hendersonia by Georgescu & Abramovich, 2008,  [copied from Chronos database]. Renamed Hendersonites carinatus by Georgescu & Abramovich, 2009

Type images:

Original description: Test only slightly longer than broad, much compressed, early portion rapidly tapering, later with the sides nearly parallel, all but the latest chambers keeled; chambers broader than high, increasing somewhat in relative height in the last chambers, only slightly inflated; sutures of the early portion slightly limbate, later ones slightly depressed; wall in the early portion slightly costate, later smooth, finely perforate; aperture low, arched.

Entries in the Catalog of original descriptions: Guembelina carinata


Emended description:


Morphology:

Wall type:

Size:

Character matrix
test outline:Subtriangularchamber arrangement:Biserialedge view:Compressedaperture:Interiomarginal
sp chamber shape:Subrectangularcoiling axis:N/Aperiphery:Single keelaperture border:Thin flange
umb chbr shape:Subrectangularumbilicus:N/Aperiph margin shape:Subangularaccessory apertures:N/A
spiral sutures:Moderately depressedumb depth:N/Awall texture:Finely costateshell porosity:
umbilical or test sutures:Moderately depressedfinal-whorl chambers:2.0-2.0 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within R. calcarata zone (75.71-76.18Ma, top in Campanian stage). Data source: [copied from Chronos database]
First occurrence (base): within D. asymetrica zone (84.19-86.71Ma, base in Coniacian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:

References:

Cushman, J. A. (1938). Cretaceous species of Guembelina and related genera. Contributions from the Cushman Laboratory for Foraminiferal Research. 14: 2-28. gs V O

Georgescu, M. D. & Abramovich, S. (2008b). Taxonomic revision and phylogenetic classification of the Late Cretaceous (upper Santonian-Maastrichtian) serial planktonic foraminifera (Familiy Heterohelicidae Cushman, 1927) with peripheral test wall flexure. Revista Española de Micropaleontología. 40: 97-114. gs V O

Georgescu, M. D. & Abramovich, S. (2009b). Short nomenclature note: A new name for the Upper Cretaceous planktic foraminiferal genus Hendersonia Georgescu and Abramovich, 2008. Revista Española de Micropaleontología. 41: 215-. gs V O

Nederbragt, A. J. (1991). Late Cretaceous biostratigraphy and development of Heterohelicidae (planktic foraminifera). Micropaleontology. 37: 329-372. gs


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Hendersonites carinatus compiled by the pforams@mikrotax project team viewed: 28-9-2022

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Short stable page link: https://mikrotax.org/pforams/index.php?id=110280 Go to Archive.is to create a permanent copy of this page - citation notes



Comments (1)

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Zahra Tarash (Isfahan, Iran)

Hello

What is abbreviation for N/A?

Thank you.

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Jeremy Young (Tonbridge, UK)

Hi Zahra

N/A means "Not Applicable" - I assumed everyone would know this, so thank you for pointing out that its not clear to all users. I will add an explanation.

Jeremy

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