Catalog - Globotruncana wilsoni Catalog - Globotruncana wilsoni

CATALOG OF ORIGINAL DESCRIPTIONS: Globotruncana wilsoni Bolli 1957

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 wilsoni
Other pages this level: << < G. stuarti parva, G. sudrensis, G. sudrensis parallela, G. tarfayaensis, G. thalmanni thalmanni, G. ticinensis, G. torensis, G. tricarinata colombiana, G. tricarinata desioi, G. undulata, G. verrucosa, G. vridhachalensis, G. walfischensis, G. wiedenmayeri, G. wiedenmayeri magdalenaensis, G. wilsoni, G. youssefi, G. zagros

Globotruncana wilsoni

Citation: Globotruncana wilsoni Bolli 1957
taxonomic rank: Species
Type specimens: P4805
Type age (chronostrat): Lower Santonian
Type locality: Type and occurrence: Holotype (USNM P4805) from Trinidad Leaseholds well Marac 1, Trinidad (coordinates N:152141 links, E:424447 links), sample from core 8,332-8,362 feet (TLL 176080).
Type repository: Washington; USNM

Linked specimens: USNM-4805 USNM-4573

Current identification/main database link: Contusotruncana plummerae (Gandolfi, 1955)


Original Description

Low trochospiral, biconvex; the equatorial periphery lobate, early chambers of last whorl with a faint double keel, which is reduced to a single keel in the last and penultimate chamber. Wall calcareous, perforate, surface smooth. Chambers moderately compressed, 12-15, arranged in 3 whorls; the 4 chambers of the last whorl increase rapidly in size, early whorls small by comparison. Sutrues on spiral side slightly curved, depressed; on umbilical side nearly radial, depressed. Umbilicus wide. Primary apertures interiomarginal, umbilical; tegilla with accessory apertures not preserved in examined specimens. The 50 specimens coil dextrally.

Size:
Dimensions of holotype: diameter 0.49 mm.; thickness 0.24 mm.

Etymology:
The species is named in honor of Mr. C. C. Wilson, Chief Geologist of Trinidad Petroleum Development, Ltd.

Extra details from original publication
Range: Globotruncana concavata zone, Naparima Hill formation.

Remarks: Globotruncana wilsoni, new species, differs from Globotruncana lapparenti bulloides Vogler in having only 4 chambers in the last whorl. The general outline of the equatorial periphery is more oval compared with the more circular form of bulloides, and the 2 keels are
more closely spaced and often reduce to one in the last chamber. Globotruncana wilsoni, new species, occurs in the Globotruncana concavata zone, before the advent of typical Globotruncana lapparenti bulloides. Transitional forms between Globotruncana wilsoni, new species, and Globotruncana fornicata Plummer have been observed.

References:

Bolli, H. M. (1957e). The genera Praeglobotruncana, Rotalipora, Globotruncana, and Abathomphalus in the Upper Cretaceous of Trinidad, B. W. I. In, Loeblich, A. R. , Jr., Tappan, H., Beckmann, J. P., Bolli, H. M., Montanaro Gallitelli, E. & Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin . 215: 51-60. gs

Bolli, H. M. (1957c). The foraminiferal genus Schackoina Thalmann, emended, and Leupoldina, n. gen. in the Cretaceous of Trinidad, B. W. I. Eclogae Geologicae Helvetiae. 50(2): 271-278. gs


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Globotruncana wilsoni compiled by the pforams@mikrotax project team viewed: 11-9-2024

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