Catalog - Globigerina (Globigerinella) praeglobigerinella

CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina (Globigerinella) praeglobigerinella Bykova 1960

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Higher levels: pf_cat -> G -> Globigerina -> Globigerina (Globigerinella) -> Globigerina (Globigerinella) praeglobigerinella
Other pages this level: G. (Globigerinella) praeglobigerinella

Globigerina (Globigerinella) praeglobigerinella

Citation: Globigerina (Globigerinella) praeglobigerinella Bykova 1960
Rank: Species
Type specimens: pl. 3, fig. 9a-c, X 102; pl. 6, figs. 29, 30.
Type age (chronostrat): Upper Middle Eocene or basal Upper Eocene.
Type locality: Not designated. One figured specimen (fig. 9a-c) from the depth interval 352-360 m. in Ustyurt reference borehole no. 1, Ust-Urt Plateau, Central Asia.
Type repository: Depository not given.

Current identification:


Original Description

[Translation from the Russian. - Let us turn our attention to tests present which are very similar to Globigerina moskvini Shutskaya and to small G. varianta Subbotina. As a result of further changes toward the side of greater involution in the upper half of the horizon under discussion (the upper Middle Eocene, Acarinina crassaformis Zone, and basal Upper Eocene) completely involute but asymmetric tests of the Globigerinella type arise, which retain, however, the perforateness of the wall characteristic of the globigerinas, and a compressed chamber shape like that of Globigerina praeglobotruncanaeformis Bykova (figs. 29, 30) (compare fig. 29 with fig. 27 and fig. 30 with fig. 28, respectively, of G. praeglobotruncanaeformis Bykova, 1960). We call this species Globigerina [Globigerinella] praeglobigerinella (although, apparently, a new genus could be distinguished).]

Size:

Etymology:

Extra details from original publication

Editors' Notes

References:

Bykova, N. K. (1960). K voprosy O tsiklichnosti filogeneticheskogo razvitiya u foraminifer. Trudy Vsesoyuznego Neftyanogo Nauchno-Issledovatel 'skogo Geologo-Razvedochnogo Instituta (VNIGRI). 163: 309-336. gs


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Globigerina (Globigerinella) praeglobigerinella compiled by the pforams@mikrotax project team viewed: 3-12-2022

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