Catalog - Globigerina (Eoglobigerina) theodosica Catalog - Globigerina (Eoglobigerina) theodosica

CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina (Eoglobigerina) theodosica Morozova 1961

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 -> Globigerina (Eoglobigerina) -> Globigerina (Eoglobigerina) theodosica
Other pages this level: G. (Eoglobigerina) balakhmatovae, G. (Eoglobigerina) bizkaiensis, G. (Eoglobigerina) eobulloides, G. (Eoglobigerina) hemisphaerica, G. (Eoglobigerina) pentagona, G. (Eoglobigerina) prebetica, G. (Eoglobigerina) taurica, G. (Eoglobigerina) tetragona, G. (Eoglobigerina) theodosica, G. (Eoglobigerina) trifolia

Globigerina (Eoglobigerina) theodosica

Citation: Globigerina (Eoglobigerina) theodosica Morozova 1961
taxonomic rank: Species
Type specimens: holotype (fig. 6a-c) 3510/2.
Type sample (& lithostrat): in a gray clayey marl
Type age (chronostrat): Lower Danian (Uylin substage), corresponding to the lower part of the G!obigerina stage of Western European authors, Dn 1 II Zone (Globigerina (Globigerina) microcellulosa Zone). Also occurs in the upper Danian. Several thousand specimens.
Type locality: Tarkhankhut Peninsula, eastern Crimea, southern Russia. Also found in the Soviet Union in the Caucasus, Russian Platform, and Turan Platform.
Type repository: Moscow, Inst. of Geol. Sci. of the Academy of Sciences

Current identification/main database link: Eoglobigerina edita (Subbotina 1953)


Original Description

[Translation from the Russian. - Test strongly compressed along the growth axis. Equatorial outer margin pentagonally scalloped. Axial outer margin broadly rounded. Spiral side weakly convex, umbilical side flat or slightly concave, with a narrow umbilicus. Spire low, consists of two whorls. Initial whorl slightly rises above the later one, which usually consists of 5 chambers. Chambers moderately inflated, placed rather freely, increase in size slowly and uniformly. Sutures deep. Aperture small, semilunate, simple, without a lip, opens into the umbilicus and has a slit-like prolongation along the marginal suture. Wall smooth, moderately perforate. 

Size:
Greatest diameter 0.32, least diameter 0.27, height 0.20 mm.

Extra details from original publication
Variability. - The number of chambers per whorl, which in some specimens goes up to five and a half, is not constant.

Comparison. - From the near species Globigerina (Eoglobigerina) taurica Morozova, 1961, this differs by the less flat test, higher spire, and often by the greater number of chambers in the last whorl, from the very similar species G. (Eoglobigerina) edita Subbotina by the less compact arrangement of the chambers, the lower spire and relatively more flattened test, the small apert ure a nd the narrow umbilicus. From the similar species G. (Eoglobigerina) cretacea d'Orbigny, 1840, which has four to four and a half chambers, more rarely five chambers, in the last whorl, this species differs by its multichambered whorls and more closely arranged chambers.

References:

Morozova, V. G. (1961). Datsko-Montskie planktonnye foraminifery yuga SSSR [Danian-Montian Planktonic Foraminifera of the Southern USSR]. Paleontologicheskiy Zhurnal. 8-19. gs 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


logo

Globigerina (Eoglobigerina) theodosica compiled by the pforams@mikrotax project team viewed: 2-3-2024

Taxon Search:
Advanced Search

Short stable page link: https://mikrotax.org/pforams/index.php?id=130310 Go to Archive.is to create a permanent copy of this page - citation notes



Add Comment

* Required information
Captcha Image
Powered by Commentics

Comments

No comments yet. Be the first!