CATALOG OF ORIGINAL DESCRIPTIONS: Sigalitruncana Korchagin 1982

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 -> S -> Sigalitruncana
Other pages this level: Schackoina, Schackoinella, Shastrina, Siderolina, Sigalia, Sigalitruncana, Sphaeroidina, Sphaeroidinella, Sphaeroidinellinae, Sphaeroidinellopsis, Spiroplecta, Steineckia, Streptochilus, Subbotina,

Sigalitruncana

Citation: Sigalitruncana Korchagin 1982
Rank: Genus
Type species: Globotruncana sigali Reichel, 1950

Current identification/main database link: Marginotruncana Hofker, 1956

See also: Globotruncana sigali- type species;


Original Description
Translation from the Russian. - Test trochospiral, lenticular, evenly convex both on dorsal and ventral sides. Chambers on dorsal side flattened, semicircular in outline with elevated sutures; on ventral side chambers moderately convex, oval in outline, separated by radial, depressed sutures. Peripheral margin narrow with a single keel. Umbilical region moderately broad, open. Aperture interiomarginal, umbilical-extraumbilical.

Family Globotruncanidae

Extra details from original publication
Remarks. - A characteristic feature of the genus is the presence of a single keel along the entire peripheral margin of the test. The species of this genus have much in common morphologically with species of Rotalipora. The possibility is not excluded that this morphological similarity has a genetic basis. In other words, the ancestors of Sigalitruncana might be representatives of Rotalipora in which the supplementary apertures were gradually reduced. From Globotruncana, Sigalitruncana differs by the structure of the peripheral margin with its single distinct keel. From the upper Senonian genus Globotruncanita it differs in test shape, and absence of elevated sutures on the ventral side.

The following species were included in the genus Sigalitruncana by Korchagin in 1982:

References:

Korchagin, V. I. (1982). Систематика глоботрунканин - Systematics of the Globotruncanids. Biulletin Moskovskogo Obschestva Ispytateley Prirody, Otddel Geologicheskii. 57(5): 114-121. gs


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Sigalitruncana compiled by the pforams@mikrotax project team viewed: 30-3-2020

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