Catalog - Guembelina pseudotessera Catalog - Guembelina pseudotessera

CATALOG OF ORIGINAL DESCRIPTIONS: Guembelina pseudotessera 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 pseudotessera
Other pages this level: << < G. mica, G. midwayensis, G. midwayensis nammalensis, 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> >>

Guembelina pseudotessera

Citation: Guembelina pseudotessera Cushman 1938
taxonomic rank: Species
Type specimens: PI. 2, figs. 19-21; 24380
Type sample (& lithostrat): Taylor marl, upper part
Type age (chronostrat): Upper Campanian
Type locality: 4.9 miles E. of Forney, on Forney-Terrell Highway, Kaufman Co., Texas
Type repository: Washington; USNM

Linked specimens: USNM-24380 USNM-24381

Current identification/main database link: Praegublerina pseudotessera (Cushman, 1938)


Original Description

Test compressed 1½ - 2 times as long as broad, rapidly tapering with greatest breadth at the last pair of chambers, periphery indented throughout; chambers somewhat inflated, broader than high throughout, in the adult somewhat curved and broader; sutures depressed, somewhat curved in the last portion; wall smooth and polished, very finely perforate; aperture very high, arched opening with a slight lip and distinct flanges, but not extending far onto the preceding chamber. 

Size:
Length 0.25 - 0.50 mm; breadth 0.20 - 0.30 mm; thickness 0.08 - 0.12 mm

Extra details from original publication
This species differs from G. globulosa in the compressed test, broader chambers, particularly in the last portion, and the some­ what curved sutures. The microspheric form is much broader than the megalospheric, and occasional specimens of the megalo­ spheric form are very narrow. A further study of the original figure given by Ehrenberg shows that his form is probably a Bolivina, or at least not a true Guembelina.
G. pseudotessera apparently ranges through most of the Austin chalk and Taylor marl from our records.

Editors' Notes
Type species of Tesseraella Aliyulla, 1977 (a subjective junior synonym of Spiroplecta according to L&T)

References:

Aliyulla, K. (1977). Верхний мел и развитие фораминифер Малого Кавказа (Азербайджан) [Upper Cretaceous and development of foraminifera of the Lesser Caucasus (Azerbaijan)]. Baku, Azerbaijan. 1-237. gs

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 pseudotessera compiled by the pforams@mikrotax project team viewed: 25-5-2024

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