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Species Globigerinoides obliqua Bolli 1957


Diagnosis / Definition:
Bolli (1957):
Shape of test trochospiral; equatorial periphery distinctly lobate; axial periphery rounded. Wall calcareous, perforate, surface finely pitted. Chambers spherical, except the ultimate ones, which are compressed in a lateral oblique manner; 12-15, arranged in about 3 whorls; the 3, in large specimens 4, chambers of the last whorl increase rapidly in size; in large specimens the last chamber may be reduced again in size. Sutures on spiral side radial to oblique, depressed; on umbilical side radial, depressed. Umbilicus small. Primary aperture a distinct, often fairly high arch, interiomarginal, umbilical; one or occasionally two supplementary sutural apertures are visible in the last few chambers. Largest diameter of holotype 0.5 mm.
Discussion / Comments:
Bolli (1957):
Globigerinoides obliqua, new species, is distinguished from the Globigerinoides triloba group by having the ultimate or the last few chambers compressed in a lateral, oblique manner. In Globigerinoides triloba they remain spherical and in the subspecies sacculifera become elongate, sack like shaped.
Systematics:

21
 Genus Globigerinoides
  Species Globigerinoides mitra
   Species Globigerinoides obliqua
Synonym list:
Bolli (1957):
1957 Globigerinoides obliqua Bolli. - Bolli : pl. 25, figs. 9a-10, text-fig. 21, No. 5 new species
Was used in synonym list of:
Globigerinoides obliquus Bolli 1957
Globigerinoides obliquus obliquus Bolli 1957
References:

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
Anonymous: Unedited TaxonConcept data
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