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Globuligerina jurassica


Classification: pf_mesozoic -> Conoglobigerinidae -> Globuligerina -> Globuligerina jurassica
Sister taxa: G. avariformis, G. balakhmatovae, G. bathoniana, G. dagestanica, G. glinskikhae, G. jurassica, G. oxfordiana, G. tojeiraensis, G. waskowskae, G. sp.

Taxonomy

Citation: Globuligerina jurassica (Gofman, 1958)
Rank: Species
Basionym: Globigerina jurassica Gofman, 1958
Synonyms:
Taxonomic discussion: The most characteristic feature of this species is the glomerate coiling of the chambers. From Globigerina hauterivica Subbotina our form differs by its more glomerate coiling and higher test. The species is close to the form described by Balakhmatova (1953, Leningrad: Vses. Nauchno-Issled. Geol. Inst. (VSEGEI), Trudy, Pal. Strat., Sbornik Statey) as Globigerina sp. [copied from Chronos database]

Type images:

Original description: Translation from the Russian - Test small, high, consists of three whorls, coiled subglomerately. Test formed by 10-11 chambers, spherical, unevenly increasting in size as added. Last whorl consists of 3-4 chambers of nearly uniform size, tightly appressed. Intercameral sutures nearly straight, weakly depressed. Aperture umbilical, in the form of an elongated slit, slightly visible at the last chamber.

Entries in the Catalog of original descriptions: Globigerina jurassica

Most likely ancestor: Globuligerina bathoniana - at confidence level 2 (out of 5). Data source: Gradstein et al. 2017 p.263.

Geological Range:
Last occurrence (top): within Early Kimmeridgian Substage (154.73-157.25Ma, top in Kimmeridgian stage). Data source: Gradstein et al. 2017
First occurrence (base): within Bathonian Stage (166.07-168.28Ma, base in Bathonian stage). Data source: Gradstein et al. 2017

Plot of range and occurrence data:

Character matrix

test outline:Lobatechamber arrangement:Trochospiraledge view:Spiroconvexaperture:Umbilical
sp chamber shape:Globularcoiling axis:Highperiphery:N/Aaperture border:N/A
umb chbr shape:Globularumbilicus:Wideperiph margin shape:Broadly roundedaccessory apertures:None
spiral sutures:Moderately depressedumb depth:Shallowwall texture:Finely pustuloseshell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:3.0-4.0 N.B. These characters are used for advanced search. N/A - not applicable

References:

Gofman, E. A. (1958). New finds of Jurassic Globigerina. Nauchnyye Doklady Vysshey Shkoly, Geologo-Geograficheskei Nauki. 1958(2): 125-126. gs

Gradstein, F. M., Gale, A. S., Kopaevich, L., Waskowska, A., Grigelis, A. & Glinskikh, L. (2017b). The planktonic foraminifera of the Jurassic. Part I: material and taxonomy. Swiss Journal of Palaeontology. 136(2): 187-257. gs V O

Simmons, M. D., Boudagher-Fadel, M. K., Banner, F. T. & Whittaker, J. E. (1997). The Jurassic Favusellacea, the earliest Globigerina. In, Boudagher-Fadel, M. K., Banner, F. T. & Whittaker, J. E. (eds) The Early Evolutionary History of Planktonic Foraminifera. British Micropalaeontological Society Publication Series. 17-30. gs V O


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Globuligerina jurassica compiled by the pforams@mikrotax project team viewed: 22-1-2021

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Short stable page link: http://mikrotax.org/pforams/index.php?id=110062 Go to Archive.is to create a permanent copy of this page - citation notes



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