CATALOG OF ORIGINAL DESCRIPTIONS: Globotruncana conica White 1928

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 conica
Other pages this level: << < G. bulloides naussi, G. calcarata, G. calcarata arcata, G. calcarata primitiva, G. calcarata retardata, G. caliciformis sarmientoi, G. caliciformis trinidadensis, G. campbelli, G. canaliculata ventricosa, G. carpathica, G. carteri, G. churchi, G. citae, G. coldreriensis, G. concavata cyrenaica, G. conica, G. conica plicata, G. contusa galeoidis, G. contusa patelliformis, G. contusa scutilla, G. contusa witwickae, G. convexa, G. culverensis, G. dentata, G. dorreeni, G. dupeublei, G. erevanica, G. falsocalcarata, G. falsostuarti, G. fareedi, G. flexuosa> >>

Globotruncana conica

Citation: Globotruncana conica White 1928
Rank: Species
Type locality: In marls 2.2 km east of Guerrero, Tampico embayment, Mexico.
Type age (chronostrat): Maastrichtian
Type specimens: 19891
Type repository: New York; AMNH - Columbia University Collection now at the American Museum of Natural History

Current identification/main database link: Globotruncanita conica (White, 1928)


Original Description
"Test large, strongly spiroconvex, coiled in a high trochospire. Spiral side strongly convex, umbilical side convex. Equatorial periphery circular, slightly lobate with a double keel composed of one primary and strongly beaded keel and a weakly developed secondary keel visible in the umbilical side of the periphery. Chambers arranged in 4 whorls increasing in size in the direction of coiling. Initial chambers small and globular and followed by larger, subpetaloid chambers becoming gradually larger in the direction of coiling. Final whorl composed of subpetaloid chambers on spiral side, on umbilical side ovoid chambers elongated in the direction of coiling. Sutures on spiral side curved, raised and strongly beaded, on umbilical side slightly curved, raised in the beginning of the last whorl and finally become depressed. Umbilicus raised in the beginning of the last whorl and finally become depressed. Umbilicus wide and deep, surrounded by periumbilical ridges and covered by tegilla. Primary aperture interiomarginal umbilical. Accessory apertures intralaminal. Surface smooth. Wall calcareous, perforate except for tegilla and keels."

References:

White, M. P. (1928). Some Index Foraminifera of the Tampico Embayment Area of Mexico. Journal of Paleontology. 2(3): 177-215. gs


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Globotruncana conica compiled by the pforams@mikrotax project team viewed: 30-7-2021

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