Citation: Globigerina sastrii Raju 1971Rank: speciesType specimens: Plate IV, figs. 1 a-c, 2 a-c; Type sample (& lithostrat): Core sample, WLC-3, at a depth of 1580 m. in Karaikal well No. 4.Type age (chronostrat): OligoceneType locality: Karaikal well No. 4., Cauvery basin., IndiaType repository: Baroda; Palaeontology Laboratory, O. N. G. Commission, Baroda, India
Original Description Test low trochospiral, the equatorial profile is subcircular, equatorial periphery is broadly lobate; the axial periphery is broadly rounded with dorso-peripheral shoulder. The dorsal surface is flat to very slightly convex, the ventral surface is strongly vaulted. Wall calcareous, coarsely hispid, rugosities or short thick spines are found throughout, but more prominent around the umbilicus. Chambers, earlier ones spherical, later ones subconical, arranged in 2—3 whorls; the last 2 or 3 chambers increase very rapidly in size and strongly embrace the earlier ones; in umbilical view the last two chambers are prominently visible. Sutures on spiral side curved, less distinct in early stage, radial or oblique later, slightly depressed; umbilical side radial, depressed. Umbilicus small, narrow slit like, often covered by the last chamber, elongate, depressed; not sharply delineated. Aperture is often covered, narrow slit like. Size: Largest diameter of the holotype is 0.64 mm. Etymology: This species is named after V. V. Sastri, O. N. G. Commission, India in recognition of his
contributions to biostratigraphy in India.
Extra details from original publication Remarks: This is a distinctive, short ranged species.
Age and distribution: Presence of Globigerina gortanii gortanii, G. ampliapertura, G. sellii, Globorotalia increbescens and other forms in the type sample indicates an Oligocene age. This species is recorded from TPD-1, NGT-1, Karaikal wells and Madanam well in Cauvery basin. Editors' Notes
Raju, D. S. N. (1971). Upper Eocene to Early Miocene planktonic foraminifera from the subsurface sediments in Cauvery Basin, India. Jahrbuch der Geologischen Bundesanstalt, Sonderband. 17: 7-68. gsVO
Globigerina sastrii compiled by the pforams@mikrotax project teamviewed: 4-12-2022