Catalog - Globotruncana indica Catalog - Globotruncana indica

CATALOG OF ORIGINAL DESCRIPTIONS: Globotruncana indica Jacob & Sastry 1950

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 -> Globotruncana -> Globotruncana indica
Other pages this level: << < G. fornicata plummerae, G. fresnoensis, G. fundiconulosa, G. gagnebini, G. gansseri, G. gansseri gandolfii, G. gansseri subgansseri, G. globigerinoides, G. goudkoffi, G. hanzawai, G. havanensis, G. helvetica, G. helvetica posthelvetica, G. hilli, G. imbricata, G. indica, G. inornata, G. intermedia, G. intermedia difformis, G. japonica, G. japonica robusta, G. kuepperi, G. lakrai, G. lamellosa, G. lapparenti, G. lapparenti coronata, G. lapparenti depressa, G. lapparenti inflata, G. lapparenti longilocula, G. leupoldi, G. linnei angusticarenata> >>

Globotruncana indica

Citation: Globotruncana indica Jacob & Sastry 1950
taxonomic rank: Species
Described on page(s) : 267
Type specimens: text fig. 2a-c
Type sample (& lithostrat): clay with thin veins of gypsum.
Type age (chronostrat): Cenomanian, Uttattur stage
Type locality: Outcrop in a nala-cutting about one mile west of the village of Garudamangalarm, near Trichinopoly, southern India; lat. 11.08 N., long. 78.92 E.
Type repository: not stated - probably deposited in the collections of the Geological Survey of India, Calcutta

Current identification/main database link: Dicarinella imbricata (Mornod, 1950)


Original Description

Test plano-convex with a flat dorsal side and a moderately convex ventral side; peripheral marg in with double keel; chambers invariably five in the last whorl; the last chamber mnch inflated; sutures very distinct; wall smooth but finely perforate in the middle of the chambers; umbilicus wide ; aperture on the ventral side on the inner margin of the last chamber; aperture large and rounded, opening into the umbilicus.

Size:
Diameter 0.32 to 0.5 mm.; thickness 0.16 to 2 mm.

Extra details from original publication
This form resembles Globotruncana ventricosa White to some extent, but differs in having invariably five chambers in the last-formed whorl, and a conspicuously large aperture; the convexity of the ventral side is not much pronounced as in White's figures. In addition, Globotruncana ventricosa is a type from Mexico where the species has been recorded as most abundant in the Papagallos formation (Campanian). Further, as our form occurs along with Globotruncana apenninica Renz which is an established Cenomanian species, we are inclined to institute a new species, Globotruncana indica, to accommodate this form from the Uttattur stage.

References:

Jacob, K. & Sastry, M. V. A. (1950). On the occurrence of Globotruncana in Uttattur stage of the Trichinopoly Cretaceous, south India. Science and Culture. 16(6): +267-+. gs


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Globotruncana indica compiled by the pforams@mikrotax project team viewed: 21-7-2024

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