Catalog - Chiloguembelina orientalis

CATALOG OF ORIGINAL DESCRIPTIONS: Chiloguembelina orientalis Morozova, in Morozova et al. 1967

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 -> C -> Chiloguembelina -> Chiloguembelina orientalis
Other pages this level: C. adriatica, C. andreae, C. circumlabiata, C. fusiformis, C. midwayensis strombiformis, C. midwayensis subcylindrica, C. minutissima, C. noguerensis, C. orientalis, C. parallela, C. praecursor, C. subtriangularis, C. subwilcoxensis, C. taurica, C. ujliaensis, C. victoriana, C. vineetae, C. waiparaensis, C. woodi

Chiloguembelina orientalis

Citation: Chiloguembelina orientalis Morozova, in Morozova et al. 1967
Rank: Species
Type specimens: holotype (fig. 9) 3512/47.
Type sample (& lithostrat): Very abundant.
Type age (chronostrat): Paleocene, upper Thanetian, Acarinina quadratoseptata Zone, A. quadratoseptata-Acarinina aff. tadjikistanensis Subzone.
Type locality: Kizilcheshme, Kyuren-Dag, Turkmenistan.
Type repository: Moscow, Inst. of Geol. Sci. of the Academy of Sciences

Current identification:

Original Description

[Translation from the Russian.]
Diagnosis - A broad, thick Chiloguembelina; chambers rapidly enlarging, last and next-to-last ones large, overhang in a mushroom shape the preceding chambers.
Description. - Test roughly wedge-shaped, rapidly increasing in width and breadth. Initial end narrow, acute, apertural end broad. In each row are 6-7 strongly embracing chambers, rapidly increasing in height. Last and next-to-last chambers much larger than others and take up almost half the test. They overhang in a mushroom shape the previous chambers. Sutures between the earlier chambers slightly depressed, between later chambers deep. Aperture a broad arcuate slit. Wall finely perforate.

Height 0.29mm, width 0.21mm, breadth 0.18mm


Extra details from original publication
Variation-  Some tests are slightly curved along the growth axis, such as the holotype, others are straight. Next-to-last and last chambers usually are tightly appressed and slightly pointed upward, but sometimes their vertices are spherically rounded or slightly flattened.
Comparison - From C. midwayensis (Cushman) [Guembelina midwayensis, 1940] and C. crinita (Glaessner) [Guembelina crinita, 1937] this species differs by its thicker test, embracing chambers, rapid chamber growth, relatively large chamber dimensions, and mushroom-like shape of the last pair of chambers.]

Editors' Notes


Morozova, V. G., Kozhevnikova, G. E. & Kuryleva, A. M. (1967). Datsko-Paleotsenovye Raznofatsial'nye Otlozheniya Kopet-Daga I. Metody Ikh korrelyatsii po foraminiferam [Danian-Paleocene heterofacial deposits of Kopet-Dag and methods of their correlation according to the foraminifers]. Trudy Geologicheskiy Institut Akademiya Nauk SSSR. 157: 1-208. gs


Chiloguembelina orientalis compiled by the pforams@mikrotax project team viewed: 7-10-2022

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