CATALOG OF ORIGINAL DESCRIPTIONS: Rugoglobigerina rugosa pennyi Bronnimann 1952

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 -> Rugoglobigerina -> Rugoglobigerina rugosa pennyi
Other pages this level: R. alpina, R. jerseyensis, R. kingi, R. lobatula, R. macrocephala macrocephala, R. macrocephala ornata, R. milamensis, R. praehelvetica, R. pseudorugosa, R. reicheli hexacamerata, R. reicheli pustulata, R. reicheli reicheli, R. rugosa pennyi, R. rugosa rotundata, R. spinosa, R. tradinghousensis

Rugoglobigerina rugosa pennyi

Citation: Rugoglobigerina rugosa pennyi Bronnimann 1952
Rank: sub-species
Type locality: Trinidad Leasholds Ltd. Catalogue nos. 155591-155594, subsurface samples from the Guayaguayare area, southeastern Trinidad, BWI.
Type age (chronostrat): Maestrichtian, Upper Cretaceous.
Type sample (& lithostrat): subsurface samples from the Guayaguayare area, southeastern Trinidad, BWI.
Type specimens: 371327 Holotype:T.L.L.Cat.Nos.155591-155594.Plate 4,figs.1-3.
Type repository: Washington; USNM

Linked specimens: USNM-371327

Current identification/main database link: Rugoglobigerina pennyi Bronnimann, 1952


Original Description
The test is of intermediate size.The chambers are arranged in a low trochoidal spire of about 2 whorls. The spiral side is slightly depressed. The las volution comprises 6-7 chambers which do not, or only very slowly, increase in size. The chambers are truncate on the apertural side and rounded peripherally. The subcircular umbilicus is large and deep, and covered with a frail plate, usually preserved only in fragments along the apertural edges. The large, arcuate apertures open into the umbilicus and seem to be provided with minute lip-like borders. The surface shows strong rugosities which in the last volution are arranged in the meridional pattern.

Size: The maximum diameter of the paratypes ranges from 0.4mm.to 0.425mm. Holotype: Maximum diameter 0.4mm.Diameter of umbilicus 0.15mm. End chamber: radial diameter 0.125mm.;tangential diameter 0.175mm.; thickness 0.125 mm.

Etymology: It is named for F.W. Penny who extensively developed the use of Foraminifera in correlation and in mapping the marine Tertiary clays of the southern part of Trinidad in the early Twenties.

Extra details from original publication
This subspecies is related to the 4 to 6-chambered rugosa, but can be separated on account of the smaller average size (0.4-0.425mm,against 0.4-0.57mm.),the 6 to 7 chambers of the last volution,their less marked increase in size, and the much larger umbilicus

References:

Brönnimann, P. (1952c). Globigerinidae from the Upper Cretaceous (Cenomanian-Maestrichtian) of Trinidad, B. W. I. Bulletins of American Paleontology. 34(140): 1-70. gs


logo

Rugoglobigerina rugosa pennyi compiled by the pforams@mikrotax project team viewed: 24-11-2020

Taxon Search:
Advanced Search

Short stable page link: http://mikrotax.org/pforams/index.php?id=132205 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