CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia nicobarica Srinivasan & Sharma 1969

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.


Higher levels: pf_cat -> G -> Globorotalia -> Globorotalia nicobarica
Other pages this level: << < G. miozea, G. miozea acumarginata, G. miozea conoidea, G. miozea rifensis, G. miozea sphericomiozea, G. miroensis, G. mohleri, G. monmouthensis, G. multiloculata, G. munda, G. nagappai, G. nana pseudocontinuosa, G. nartanensis, G. naussi, G. neominutissima, G. nicobarica, G. nicolae, G. nicoli, G. obesa, G. occlusa, G. opima continuosa, G. opima nana, G. opima opima, G. orientalis, G. oscitans, G. palmerae, G. paniae, G. pentacamerata, G. perclara, G. perconigi, G. perforataminuta, > >>

Globorotalia nicobarica

Citation: Globorotalia nicobarica Srinivasan & Sharma 1969
Rank: species
Type locality: About 180 meters cast of Passa Bridge, along the motor road, Grid Ref. 92459I2, Car Nicobar Island, Bay of Bengal.
Type age: Upper Miocene, Zone N. I8 (= Globorotalia (G.) tumida tumida-Sphaeroidinellopsis subdehiscens Partial-range zone) or basal N. 19 (= Sphaeroidinella dehiscens (s.s.)/Globoquadrina altispira (s.s.) Concurrent-range zone of Banner and Blow (1965))
Type sample and level: Sawai Bay Formation; in a highly calcareous light grey mudstone.
Holotype Repository: Varanasi; the collections of the Geology Department, Banaras Hindu University, Varanasi, lndia:
Type & figured specimens: holotype (tfs. 1-3), no. F/1: and one figured (tfs. 4-6 ) and four other unfigured paratypes, no. Fp/1.

Current identification/main database link:


Original Description
Test free, small, low trochospiral, sinistrally coiled, the umbilical side slightly concave. equatorial periphery lobulate, axial periphery sub-angular with a very thin keel. Wall calcareous, perforate, umbilicus small, shallow, umbilical surface slightly roughened, spiral side comparatively smooth. Chambers spherical to subangular in outline; five to six in the final whorl, increasing rapidly as added. Sutures both on umbilical and spiral sides radial to slightly curved and slightly depressed. Aperture a low slit, slightly arched, with a lip, interiomarginal umbilical, extraumbilical.

Size: Dimensions of holotype. length 0.28 mm.. breadth, 0.24 mm., and thickness 0.14 mm.

Extra details from original publication
Remarks. - Although Globorotalia nicobarica is a rare species in the late Tertiary of Car Nicobar, it can easily be distinguished from other recorded species of G!oborotalia by the following features:
Dextally and sinistrally coiled specimens are equally common

References:

Srinivasan, M. S. & Sharma, V. (1969). A new planktonic foramnifer from the Late Tertiary of Car Nicobar Island, Bay of Bengal. Contributions from the Cushman Foundation for Foraminiferal Research. 20(3): +100-+. gs


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Globorotalia nicobarica compiled by the pforams@mikrotax project team viewed: 9-12-2019

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