CATALOG OF ORIGINAL DESCRIPTIONS: Pseudoguembelina kempensis Esker 1968

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 -> P -> Pseudoguembelina -> Pseudoguembelina kempensis
Other pages this level: P. cornuta, P. costellifera, P. hariaensis, P. kempensis, P. leroyi, P. palpebra, P. polypleura

Pseudoguembelina kempensis

Citation: Pseudoguembelina kempensis Esker 1968
Rank: Species
Type locality: Walkers Creek, abut 5.5 mi. northeast of Cameron, TX
Type age (chronostrat): Maastrichtian
Type sample (& lithostrat): Kemp Clay, 2-4' below the contact between the Littig Conglomerate and the Kemp Clay
Type specimens: 8082; Text figures 1-5. Holotype, H.V.H. no. 8082; paratype, H.V.H. no. 8083; paratype, H.V.H. no. 8084; and 7 paratypes, H.V.H. no. 8085.
Type repository: Baton Rouge; Louisiana State University, HV Howe Collection.
Described on page(s) : 168

Current identification/main database link: Pseudoguembelina kempensis Esker 1968


Original Description
Test plano-biserial or biserial, consisting of 7-12large chambers, increasing rapidly in size, and mayhave a small pointed early part consisting of about 7 additional chambers. The small early chambersmay be coiled initially (text fig. 4). The small early chambers are not inflated and the sutures are nearlyflush with the chamber surface. The surface ispunctate with the alignment of the pores, particu- larly towards the outer margin, sometimes suggest- ing faint striae (text fig. 3). The microspheric forms tend to lack spines and are not as thick. The third pair of chambers is the most strongly inflated, after which later chambers tend to be less inflatedand, finally, somewhat compressed. The last cham-ber may be very elongate and may extend com- pletely over the preceding two chambers. On the megalospheric forms, the first few large chambersusually have short thick spines that may tend to merge to form a sort of ridge. These tend to im- part a knobby appearance to the chamber (text fig. 2). Text figs. 3 and 4 show the extremes in the degree to which the test is pointed. The sutures aredeeply depressed between the large chambers. A rather thick conspicuous carina is present. The primary aperture is a large lunate arch in all cham-bers except the last one (text fig. 5). With the completion of the final chamber, the primary aperture is reduced to a narrow slit which tends strongly to become or actually forms three separate aper-tures (text fig. 2). In addition to the primary aper- ture or apertures, there are usually at least three pairs of narrow slit-like accessory apertures withprominent flaps.

Size: olotype (text figs. 1, 2): 0.407 mm. length; 0.259 mm. width; 0.148 mm. thickness, H.Y.H. no. 8082.. Paratype (text figs. 4, 5): 0.383 mm. length; 0.284 mm. width; 0.136 mm. thick- ness, H.Y.H. no. 8083. Paratype (text fig. 3): 0.420 mm. lengtb; 0.252 mm. width; 0.144 mm. thickness, H.Y.H. no. 8084.

Extra details from original publication
P. kempensis n. sp. can be distinguished from P. cornuta Seiglie, 1959; P. costulata (Cushman, 1938); P. excolata (Cushman, 1926) of which P. costata (Carsey, 1926) is a junior synonym; P. palpebra Bronnimann and Brown, 1953, and P. striata (Ehrenberg, 1838) in lacking well developed costae or striae. P. kempensis differs from P . punctulata (Cushman, 1938) and P. striata (Ehrenberg, 1838) in having more elongate arcuate later chambers and more circular early chambers. Also, P. kempensis appears to differ from all other species of Pseudoguembelina in possessing a thick prominent carina.

References:

Esker, G. C. (1968a). A new species of Pseudoguembelina from the Upper Cretaceous of Texas. Contributions from the Cushman Foundation for Foraminiferal Research. 19(4): 168-169. gs V O


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Pseudoguembelina kempensis compiled by the pforams@mikrotax project team viewed: 21-4-2021

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