CATALOG OF ORIGINAL DESCRIPTIONS: Guembelina punctulata 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 punctulata
Other pages this level: << < G. moremani, G. morsei, G. multicellaris, G. nuttalli, G. obtusa, 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, G. trinitatensis, G. turonica, G. ultimatumida, G. venezuelana, G. venezuelana rugosa, G. ventilabrelliformis> >>

Guembelina punctulata

Citation: Guembelina punctulata Cushman 1938
Rank: Species
Type locality: Paris highway, 1.8 mi. east of Deport, west-facing slope of Mustang Creek Valley, Red River County, Texas
Type age (chronostrat): Maastrichtian
Type sample (& lithostrat): Taylor marl
Type specimens: 24378
Type repository: Washington; USNM

Linked specimens: USNM-24378 USNM-24379

Current identification/main database link: Braunella punctulata (Cushman, 1938)


Original Description
Test broad and rounded, about 1½ times as broad, initial portion rapidly tapering, later portion of nearly uniform width, periphery of early portion keeled, later indented; chambers of the early portion somewhat compressed, keeled, much broader than high, rapidly inflated in the adult where they are globular; sutures in the early portion slightly costate or with the fine perforations in vertical lines, in the adult thicker-walled with the surface rather coarsely punctate; aperture, a low, broad arch with a slight lip, the sides continuing in flange onto the preceding chamber.

Size: Length 0.45-0.55 mm.; breadth 0.32­-0.35 mm.: thickness 0.22-0.25mm.

Extra details from original publication
This species differs from G. striata in the compressed and keeled early portion, very rapid expansion of· the later chambers, rather uniform width in the adult, and the'coarsely punctate sur­ face in the adult.
The range seems to be the upper part of the Taylor marl, including the Pecan Gap chalk and Wolfe City sand members, the Annona chalk, and also the Neylandville marl.

Editors' Notes
Test widely flaring in juvenile stage, sides subparallel in adult.

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

Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. gs V O

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Guembelina punctulata compiled by the pforams@mikrotax project team viewed: 27-2-2021

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