CATALOG OF ORIGINAL DESCRIPTIONS: Rectoguembelina cretacea Cushman 1932

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 -> R -> Rectoguembelina -> Rectoguembelina cretacea
Other pages this level: R. cretacea, R. hispidula,

Rectoguembelina cretacea

Citation: Rectoguembelina cretacea Cushman 1932
Rank: Species
Type locality: Arkadelphia Clay, Hope, Arkansas. On the Hope-Prescott (Little Rock) road, 5V2 miles North­ east of Hope, Arkansas, in Southwest corner, N. W. 14, Sec. 6, T. 12 S., R. 23 W., collected by L. W. Stephenson.
Type age: Upper Maastrichtian
Holotype Repository: Washington; USNM
Type & figured specimens: 16308; Plate 1, figures 11, 12

Linked specimens: USNM-21221 USNM-21219 USNM-16309 USNM-16308

Current identification/main database link: Rectoguembelina cretacea Cushman 1932


Original Description
Test consisting of two unequal portions, the early portion consisting of several pairs of globular chambers arranged as in Guembelina, the adult stage uniserial, formed usually by three subglobular or slightly pyriform chambers, slightly overlapping, the apertural end extended out into a tapering neck; sutures distinct, depressed; wall smooth, translucent, very finely perforate; aperture circular, at the end of the tubular neck.

Size: Length 0.25-0.35 mm; breadth 0.08-0.10 mm; thickness 0.05-0.07 mm.

Extra details from original publication
This is a somewhat larger species than the following, holds the Gümbelina stage much longer, and has distinctly fewer chambers in the uniserial portion.

References:

Cushman, J. A. (1932). Rectoguembelina, a new genus from the Cretaceous. Contributions from the Cushman Laboratory for Foraminiferal Research. 8(1): 4-7. gs V O

Montanaro Gallitelli, E. (1957). A revision of the foraminiferal family Heterohelicidae. In: Studies in foraminifera; Part 1 - Planktonic foraminifera. In, Loeblich, A. R. , Jr. , Tappan, H. , Beckmann, J. P. , Bolli, H. M. , Montanaro Gallitelli, E. & Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin. 215: 133-154. gs V O

Olsson, R. K., Hemleben, C., Berggren, W. A. & Huber, B. T. (1999). Atlas of Paleocene Planktonic Foraminifera. Smithsonian Institution Press, Washington, DC. 1-252. gs


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Rectoguembelina cretacea compiled by the pforams@mikrotax project team viewed: 29-9-2020

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