Catalog - Guembelina carinata

CATALOG OF ORIGINAL DESCRIPTIONS: Guembelina carinata Cushman 1938

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.


Higher levels: pf_cat -> G -> Guembelina -> Guembelina carinata
Other pages this level: G. abnorma, G. acervulinoides, G. barnardi, G. boliviniformis, G. carinata, G. cenomana, G. cenomanica, G. complanata, G. conjakica, G. costulata, G. crinita, G. cubensis, G. cubensis heterostoma, G. dagmarae, G. deflaensis, G. distorta, G. excolata, G. fructicosa, G. garretti, G. glabrans> >>

Guembelina carinata

Citation: Guembelina carinata Cushman 1938
Rank: Species
Type specimens: PI. 3. fig. 10; 24390
Type sample (& lithostrat): lower part of Taylor marl
Type age (chronostrat): Santonian
Type locality: Ditch northeast of Commerce-Paris highway, 6 mi. south of T. and P. R. R. station in Paris, Lamar, County, TX
Type repository: Washington; USNM

Linked specimens: USNM-31504 USNM-31499 USNM-24390

Current identification/main database link: Hendersonites carinatus (Cushman, 1938)


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.

Size:
Length: 0.20 - 0.22 mm; breadth 0.15 - 0.18 mm; thickness 0.06 - 0.08 mm

Etymology:

Extra details from original publication
This species differs from G. striata in the smaller, much com­pressed test, which is strongly carinate. It occurs mostly in the lower part of the Taylor marl, but specimens occur rarely in the Annona chalk and Wolfe City sand member of the Taylor. It is evidently the ancestral form of some of those species with compressed and carinate early stages. It was at first thought possible the young of some of the other species, but seems to be distinct.

Editors' Notes
Intermediate costae; sharply acute periphery; rugose ornamentation along median suture --Huber

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


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Guembelina carinata compiled by the pforams@mikrotax project team viewed: 6-7-2022

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