Catalog - Guembelina glabrans Catalog - Guembelina glabrans

CATALOG OF ORIGINAL DESCRIPTIONS: Guembelina glabrans 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 glabrans
Other pages this level: << < 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, G. globocarinata, G. globulosa dibrarica, G. globulosa striatula, G. goodwini, G. malocaucasica, G. marshallana, G. mauriciana, G. mica, G. midwayensis, G. midwayensis nammalensis, G. moremani, G. morsei, G. multicellaris, G. nuttalli, G. obtusa> >>

Guembelina glabrans

Citation: Guembelina glabrans Cushman 1938
Taxonomic rank: species
Type specimens: Pl. 3, figs. 1. 2; 24382
Type sample (& lithostrat): Navarro Group, base of the Kemp Clay
Type age (chronostrat): Late Cretaceous
Type locality: Branch of Mustang Creek, 1 mi. west-southwest of Noack (?), 900' downstream from road, 0.2 mi southwest of Christ Evangelical Lutheran Church, Williamson County, TX
Type repository: Washington; USNM

Linked specimens: USNM-24382 USNM-24383 USNM-31794

Current identification/main database link: Laeviheterohelix glabrans (Cushman, 1938)


Original Description

Test nearly twice as long as broad, tapering, throughout, much compressed, early portion with the periphery entire and slightly keeled, later moderatly indented; chambers in the microspheric form mostly slightly broader than high, in the megalospheric form with the later chambers with the height often as great or greater than the breadth, later ones more inflated but somewhat compressed throughout; sutures in the early portion slightly limbate, in the adult depressed; wall in the early portion coarsely punctulate, somewhat roughened, in the adult smooth and polished; aperture higher than broad, arched with a slight lip and flanges at the sides extending onto the preceding chamber.

Size:
Length 0.40 mm.; breadth 0.20-0.25 mm. ; thickness 0.10 mm.

Extra details from original publication
This species differs from G. globulosa in the much compressed test, early portion keeled and roughened, and the later portion smooth imd polished. It seems to be confined to rocks of Navarro age, occurring in the Corsicana marl, Kemp clay, and Prairie Bluff chalk. The specimens from the Georges Bank Canyon in the reference above also belong here.

Editors' Notes
Distinguished by smooth, microperforate wall, subacute periphery, lentil-shaped chambers.

References:

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


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Guembelina glabrans compiled by the pforams@mikrotax project team viewed: 10-5-2026

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