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Species Globigerina trilocularis d'Orbigny 1826


Discussion / Comments:
Bolli (1957):
The Trinidad specimens resembling the figures of Globigerina trilocularis given by Fornasini are for the present placed in this species. They are restricted in Trinidad to the lower (Oligocene) part of the Cipero formation, whereas d'Orbigny's type might be from a different level. From observations made on material from the Globorotalia kugleri zone, it appears probable that the Globigerina cf. trilocularis can be regarded as the ancestor of Globigerinoides triloba (Reuss). Specimens of Globigerina trilocularis and Globigerinoides triloba immatura Le Roy were found to be indistinguishable in this zone, except that the latter showed a supplementary sutural aperture in the last chamber.
Systematics:

24
 Genus Globigerina
  Species Globigerina trilocularis
Synonym list:
Bolli (1957):
1826 Globigerina trilocularis d'Orbigny. - d'Orbigny : p. 277 unpublished figures of d'Orbigny in Fornasini, Rend. Accad. Sci. Inst., Bologna, new ser. vol. 2, fasc. 1, pl. 1, figs. 6, 7-7a; p. 12, text-fig
1945 Globigerina cf. bulloides d'Orbigny. - Cushman & Stainforth : p.68 pl. 13, figs. 4a-b
1957 Globigerina cf. trilocularis d'Orbigny. - Bolli : pl. 22, figs. 8a-9c
Bolli (1957):
1957 Globigerina cf. trilocularis d'Orbigny. - Bolli : p. 273 pl. 36, figs. 3a-b
References:

d'Orbigny,A.D. (1826):
Tableau méthodique de la classe des céphalopodes . Ann. Sci. Nat. Paris, Ser 1 Vol. 7 p. 96-314

Cushman,J.A. and Stainforth,R.M. (1945):
The foraminifers of the Cipero Marl Formation of Trinidad, British West Indies . Journal of Foraminiferal Research Vol. 14 p. 1-75

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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