CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina compressa caucasica Khalilov 1956

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 -> Globigerina compressa caucasica
Other pages this level: << < G. cerroazulensis, G. chascanona, G. ciperoensis, G. ciperoensis angulisuturalis, G. ciperoensis angustiumbilicata, G. ciperoensis ottnangiensis, G. circumnodifer, G. clarae, G. clarkei, G. clippertonensis, G. coalingensis, G. colomi, G. columbae, G. compacta, G. compressa, G. compressa caucasica, G. compressaformis, G. concinna, G. concinna altihelix, G. concinna anapetes, G. conglobata, G. conglomerata, G. conglomerata Terquem, G. conglomerata paula, G. conica, G. contorta, G. corpulenta, G. crassa, G. crassaformis, G. cretacea, G. cretacea delrioensis, > >>

Globigerina compressa caucasica

Citation: Globigerina compressa caucasica Khalilov 1956
Rank: sub-species
Type locality: northeastern foothills of the Maly Caucasus, Nakhichevan A.S.S.R .
Type age: Lower Paleocene, Danian
Holotype Repository: Baku; Geological Institute, Academy of Sciences, Baku, Azerbaijan
Type & figured specimens: pl. 1, fig. 2a-c
Description on pages: 237

Current identification/main database link:


Original Description
Translation from the Russian. - Test oval, low conical, with a compressed periphery. Dorsally, following the initial chamber, there are six small chambers in the first whorl, and four chambers in the second whorl. Ventrally, there are four chambers. Sutures on the dorsal side weakly curved.

Test oval, low conical, considerably compressed on two opposite sides, especially at the peripheral margin, where a blunt, lobate keel is formed. The dorsal side is more flattened than the ventral; following the initial round chamber, there are, in the first whorl, six small, flattened chambers increasing rapidly in size, which are surrounded by four large chambers of the final whorl, moderately protruding from the surface. Ventrally, the largest (last) chamber is perpendicular to the three remaining radially arranged chambers of the final whorl, Sutures between the chambers narrow, in the final whorl depressed; on the ventral side, they are straight. Dorsally, the sutures of the early whorls are slightly curved, very faintly depressed. The umbilicus is usually filled with secondary test material. Aperture slitlike, barely discernible. Wall calcareous, surface covered by tiny pores.

Size: Diameter 0.35 mm.; thickness 0.17 mm.

Extra details from original publication
Comparison. - The described species differs from the typical form in the smaller number of chambers, including the final whorl.

References:

Khalilov, D. M. (1956). 0 pelagicheskoy faune foraminifer Paleogenovykh otlozheniy Azerbaydzhana [Pelagic Foraminifera of the Paleogene Deposits of the Azerbaizhan SSR]. Trudy Instituta Geologii, Akademiya Nauk Azerbaidzhanskoi SSR. 17: 234-255. gs :: ::


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Globigerina compressa caucasica compiled by the pforams@mikrotax project team viewed: 9-7-2020

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Comments (1)

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Fran├žois

Globigerina compressa caucasica according to E&M, Blow (1979) and others.

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Jeremy Young (Tonbridge, UK)

corrected, thanks Jeremy

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