CATALOG OF ORIGINAL DESCRIPTIONS: Rectoguembelina 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
Other pages this level: Racemiguembelina, Rectoguembelina, Riveroinella, Rosalina, Rosalinella, Rotalia, Rotalina, Rotalipora, Rotundina, Rugoglobigerina, Rugoglobigerina (Archaeoglobigerina), Rugoglobigerina (Plummerella), Rugoglobigerina (Rugoglobigerina), Rugotruncana

Rectoguembelina cretacea Cushman 1932
= Rectoguembelina cretacea
Rectoguembelina hispidula Cushman 1938

Rectoguembelina

Citation: Rectoguembelina Cushman, 1932
Rank: Genus
Type species: Rectoguembelina cretacea Cushman, 1932

Current identification/main database link: Rectoguembelina Cushman, 1932


Original Description
Test with the early chambers arranged in a biserial manner similar to Guembelina, later chambers uniserial and rounded in transverse section; chambers all inflated, distinct; sutures distinct, depressed; wall calcareous, thin, very finely perforate; aperture in the early stages similar to Guembelina, in the adult terminal, rounded, with a distinct neck.

Extra details from original publication
Introductory text:  In the Heterohelicidae there are numerous developments which evidently came from Guembelina, such as Pseudotextularia, Planoglobulina, Ventilabrella, etc. These have come about by the addition of more complex types of development. It is, therefore, interesting to note the following genus which is in its gen­ eral characters a parallelism with Bigenerina in the Textularii­dae. Our species, however, are developed directly from Guem­belina as the early stages show, and the wall is calcareous and finely perforate. It is to be looked for, from the two records given here, in the various portions of the Upper Cretaceous of Texas and adjacent regions.

Editors' Notes
Cushman 1932 described two species in this genus - R. cretacea and R. texana, and several further species have been described. However most of these are now interpreted as benthic forminifera and placed in the genera Bifarina or Tubitextularia (see Olsson et al. 1999 p93-94) - so they are not cataloged here. 

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


logo

Rectoguembelina compiled by the pforams@mikrotax project team viewed: 22-10-2020

Taxon Search:
Advanced Search

Short stable page link: http://mikrotax.org/pforams/index.php?id=132137 Go to Archive.is to create a permanent copy of this page - citation notes



Comments (0)

No comments yet on this page. Please do add comments if you spot any problems, or have information to share

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics