CATALOG OF ORIGINAL DESCRIPTIONS: Globotruncana lapparenti longilocula Gandolfi 1955
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Citation: Globotruncana lapparenti longilocula Gandolfi 1955Taxonomic rank: sub-speciesType specimens: PI. 1, fig. 1, Text figs. 3,4 (8a-b) : type description p.17Type sample (& lithostrat): Manaure section, S. 9168. Type age (chronostrat): Campanian-MaastrichtianType locality: Cesar Valley, Rio Manaure, 100 km. ESE of La Paz; northern Colombia Type repository: Ithaca, New York; Paleontological Research Institution
Original Description Flat or only slightly convex on both sides, peripheral band wide and perpendicular to the coiling plane, double-keeled; chambers short, slightly over-lapping each other in the early stages, becoming later in the adult stage (four-five in the last whorl) long, arched and strongly overlapping: (fornicata- type); sutures continuously raised, sigmoidal on the ventral side, running and plunging back into the umbilicus (lapparenti type). Test smooth, dextrally coiling in all counted specimens, umbilical apertures with slightly arched, moderately developed cover plates. Size: Dimensions of holotype 0.40 x 0.36 mm. Extra details from original publication Remarks.—It is the usual flat double-keeled form of the lapparenti type. The chambers, however, are more elongated and arched, the sutures more finely raised than in Glt. lapparenti lapparenti.
As can be seen in text figures 3 and 4, the tests of the Breggia material (south Switzerland) have chambers (five-six) in the last whorl which, however, overlap less on each other and increase less rapidly in size as added. In text figure 4 Glt. lapparenti Cita appears to be similar with chambers somewhat elongated. The few specimens of the present material show more pronounced elongated chambers. Glt. tricarinata colombiana seems to bear an analogous relationship to Glt. tricarinata tricarinata.
Glt. canaliculata Cushman (not Reuss) of the Annona chalk is a different, more evolved species, showing more oblique sutures on the dorsal side, which are clearly beaded and, on the ventral side, simply curved without any sigmoidal development; the test, especially in the early chambers, is abundantly spinose.
References:
Gandolfi, R. (1955). The genus Globotruncana in northeastern Colombia. Bulletins of American Paleontology. 36: 1-118. gs
Globotruncana lapparenti longilocula compiled by the pforams@mikrotax project teamviewed: 19-3-2025
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holotype illus-526.jpg
holotype illus-526.jpg
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