pforams@mikrotax - Pseudotextularia nuttalli

Pseudotextularia nuttalli


Classification: pf_mesozoic -> Heterohelicidae -> Pseudotextularia -> Pseudotextularia nuttalli
Sister taxa: P. elegans, P. intermedia, P. nuttalli, P. sp.

Taxonomy

Citation: Pseudotextularia nuttalli (Voorwijk, 1937)
Rank: Species
Basionym: Guembelina nuttalli
Synonyms: Pseudotextularia browni; Pseudotextularia elongata; Guembelina plummerae; Guembelina santonica pseudoobtusa; Guembelina santonica; Guembelina subplummerae; Pseudotextularia cushmani
Taxonomic discussion: no holotype image available in E+M online catalogue. Just some illustrations of non-holotype specimens. [copied from Chronos database]

Type images:

Original description: Typical for this species is the flattening of the test in a direction opposite to most forms of this genus, so that the broad side shows one, and the narrow side two series of chambers. The great change in the ratio of length, breadth and width is remarkable and can be.seen on PI. Il, fig.1-9. The figured specimens are from different localities.

Entries in the Catalog of original descriptions: Guembelina nuttalli, Pseudotextularia browni, Pseudotextularia elongata, Guembelina plummerae, Guembelina santonica pseudoobtusa, Guembelina santonica, Guembelina subplummerae, Pseudotextularia cushmani


Emended description:


Morphology:

Wall type:

Size:

Character matrix
test outline:Subtriangularchamber arrangement:Biserialedge view:Compressedaperture:Interiomarginal
sp chamber shape:Reniformcoiling axis:N/Aperiphery:N/Aaperture border:Thin flange
umb chbr shape:Reniformumbilicus:N/Aperiph margin shape:Broadly roundedaccessory apertures:None
spiral sutures:Moderately depressedumb depth:N/Awall texture:Finely costateshell porosity:Microperforate: <1µm
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 P. hariaensis zone (66.39-67.30Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within D. concavata zone (86.71-89.91Ma, base in Turonian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:

References:

Nederbragt, A. J. (1989b). Maastrichtian Heterohelicidae (Planktonic Foraminifera) from the North West Atlantic. Journal of Micropalaeontology. 8(2): 183-206. gs V O

Smith, C. C. & Pessagno, E. A. (1973). Planktonic foraminifera and stratigraphy of the Corsicana formation (Maestrichtian) North-central Texas. Cushman Foundation for Foraminiferal Research, Special Publication. 12: 1-67. gs V O

Voorwijk, G. H. (1937). Foraminifera from the Upper Cretaceous of Habana, Cuba. Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen. 40: 190-198. gs V O


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Pseudotextularia nuttalli compiled by the pforams@mikrotax project team viewed: 28-9-2022

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