CATALOG OF ORIGINAL DESCRIPTIONS: Guembelina planata 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 planata
Other pages this level: << < G. goodwini, G. malocaucasica, G. marshallana, G. mauriciana, G. mica, G. midwayensis, G. midwayensis nammalensis, G. moremani, G. morsei, G. multicellaris, G. nuttalli, G. ototara, G. papula, G. paucistriata, G. plana, G. planata, G. plummerae, G. pseudostriata, G. pseudotessera, G. pulchra, G. pumilia, G. punctulata, G. reussi, G. santonica, G. santonica pseudoobtusa, G. semicostata, G. spinifera, G. striata compressa, G. striata deformis, G. subplummerae, G. tenuis, > >>

Guembelina planata

Citation: Guembelina planata Cushman 1938
Rank: Species
Type locality: Paris highway, 1.8 mi. east of Deport, west-facing slope of Mustang Creek Valley, Red River County, TX.
Type age: Santonian
Type sample and level: Taylor marl
Holotype Repository: Washington; USNM
Type & figured specimens: Pl. 2. figs. 13, 14. 24376

Linked specimens: USNM-24377 USNM-24376

Current identification/main database link: Planoheterohelix planata (Cushman, 1938)

Original Description
Test compressed, about 1½ times as long as broad, rapidly tapering with the greatest breadth formed by the last pair of chambers, periphery slightly keeled in the early portion, in the remainder deeply indentate; chambers broader than high throughout, somewhat compressed, in the adult portion separated by depressed triangular areas; sutures distinctly depressed, somewhat curved; wall smooth, finely perforate, the perforations tending to be in longitudinal lines; aperture high, arched, with distinct lateral flanges running out onto the preceding chamber.

Size: Length 0.35 mm - 0.45 mm; breadth 0.25 - 0.30 mm; thickness 0.12 mm - 0.14 mm

Extra details from original publication
This species differs from G. striata in the broader, more com­pressed chambers, slight keel in the early portion, and the smoother surface. So far, the species has been found only in the lower part of the upper portion of the Taylor.

Editors' Notes
Thin, discontinuous costae; ovate chambers; aperture bordered by small but distinct flanges. [Huber]


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


Guembelina planata compiled by the pforams@mikrotax project team viewed: 13-7-2020

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