Globigerina parva Bolli 1957 (TaxonConcept

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Species Globigerina parva Bolli 1957

Diagnosis / Definition:

Bolli (1957):
Shape of test small, medium to high trochospiral; equatorial periphery distinctly lobate. Wall calcareous, perforate, surface smooth to very finely pitted. Chambers spherical; 10-12, arranged in about 2 1/2 whorls; the 4 or occasionally 5 chambers of the last whorl increase moderately in size. Sutures on spiral side radial, depressed; on umbilical side radial, depressed. Umbilicus small. Aperture a medium to low arch; interiomarginal, umbilical. Coiling random. Largest diameter of holotype 0.25 nun.

Discussion / Comments:

Bolli (1957):
Globigerina parva, new species, is separated from the G. ciperoensis subspecies in being more trochospiral and in having usually 4 instead of 5 chambers in the last whorl. The new species occurs also in the upper Eocene.
This small, strongly lobate, fairly high spired form with four chambers in the last whorl is typical for the upper Eocene and basal Oligocene. Globigerina ouachitaensis Howe and Wallace, described from the upper Eocene is probably very close to this species.

Systematics:

24
Genus Globigerina
Species Globigerina parva

Synonym list:

Bolli (1957):

1957 Globigerina parva Bolli. - Bolli : pl. 22, figs. 14a-c new species

Bolli (1957):

? 1932 Globigerina ouachitaensis Howe & Wallace. - Howe & Wallace : p. 74 pl. 10, figs. 10a-b

1957 Globigerina parva Bolli. - Bolli : p. 273 pl. 36, figs. 7a-c

1957 Globigerina parva Bolli. - Bolli : p. 108 pl. 22, figs. 14a-c

References:

Howe,H.V. and Wallace,W.E. (1932):
Foraminifera of the Jackson Eocene at Danville Landing on the Ouachita, Catahoula Parish, Louisiana . Bull. Louisiana Dept. Conservation Geol. Vol. 2 p. 18-79

Bolli,H.M. (1957):
Planktonic foraminifera from the Oligocene-Miocene Cipero and Lengua formations of Trinidad, B.W.I..
In: Studies in Foraminifery, Bulletin of the U.S. National Museum Vol. 215 Eds: Loeblich, A.R.Tappan, H.Beckmann, J.P.Bolli, H.M.Gallitelli, E.M.Troelsen, J.C. p. 97-123

Bolli,H.M. (1957):
Planktonic Foraminifera from the Eocene Navet and San Fernando formations of Trinidad, B.W.I. . Bull. U.S. natl. Mus. Vol. 215 p. 155-172

Anonymous: Unedited TaxonConcept data

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