CATALOG OF ORIGINAL DESCRIPTIONS: Globotruncana culverensis Barr 1962
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.
Original Description Test free, low trochospiral, slightly biconvex, evolute, umbilicate, 3 to 3.5 whorls, equatorial periphery nearly circular, lobulate with 2 fairly well-developed, closely spaced, finely beaded keels which often merge into single keel on final 1 to 4 chambers; dorsal keel extends on to spiral side of test as slightly raised sutural ridge; ventral keel diverges on to umbilical side of test and is often obscured by embracing nature of chambers, then extends back along umbilical margin as a slightly raised ridge; chambers inflated, slightly truncate, slightly elongate in direction of coiling, overlapping, 7 to 8 chambers in final whorl uniformly increasing in size, often added in slightly oblique position; sutures distinct, depressed, nearly radial; umbilicus broad, deep, in well-preserved specimens covered by a complex tegillum with marginal accessory apertures; primary aperture interiomarginal, umbilical; wall calcareous, composed of radial calcite, uniformly perforate except for imperforate keels, peripheral area between keels, and tegilla; surface hispid becoming less hispid with growth; coiling predominantly dextral; 29 of 30 specimens selected at random coiled dextrally.
References:
Barr, F. T. (1962). Upper Cretaceous planktonic foraminifera from the Isle of Wight, England. Palaeontology. 4(4): 552-580. gs
Globotruncana culverensis compiled by the pforams@mikrotax project teamviewed: 29-4-2025
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