CATALOG OF ORIGINAL DESCRIPTIONS: Globotruncana bulloides naussi Gandolfi 1955
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Citation: Globotruncana bulloides naussi Gandolfi 1955Taxonomic rank: sub-speciesType specimens: PI. 1, fig. 13a-c ; 20832: type description p.34Type sample (& lithostrat): Well Papayal No. 1, 210-215', Type age (chronostrat): Campanian-MaastrichtianType locality: 24 km, north of Fonseca, NE part of the State of Magdalena, northern Colombia.Type repository: Ithaca, New York; Paleontological Research Institution
Original Description Flat double-keeled form, tending to become loosely coiled; wide peripheral band, lobate periphery, chambers (six-seven in the last whorl) inflated on both sides, becoming considerably higher in the last coil and more loosely spaced, whereas in the younger stages they are normally overlapping. The increase in size is irregular in the last coil so that the last chambers are generally smaller or more flattened than the previous ones; senile chambers are frequent. Thin continuously raised sutures, finely beaded in the early stages, occur on the dorsal side. On the ventral side the sutures are radial and depressed; the thickening toward the umbilicus generally weak. Occasionally, one or two of the last chambers show a weak curved sutural elevation. The test is smooth, rougher in the early chambers. The apertural system, as far as could be seen in the last chambers, apparently belongs to the lapparenti type with thin, slightly arched lip projections. Size: Dimensions of holotype. Width 0.38 x 0.34 mm; thickness 0.15 mm. Etymology: named after A. W. Nauss, who discovered and named Rugoglobigerina loetterli loetterli. Extra details from original publication Remarks. This speies is close to Glt. bulloides bulloides (Vogler) and Glt. bulloides globigerinoides (Brotzen). The last coil, the petaloid chambers, and the irregular increase in size of the last chambers are quite distinctive, keeping on throughout the following mutations toward a Rugoglobigerina form.
References:
Gandolfi, R. (1955). The genus Globotruncana in northeastern Colombia. Bulletins of American Paleontology. 36: 1-118. gs
Globotruncana bulloides naussi compiled by the pforams@mikrotax project teamviewed: 16-3-2025
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holotype illus-507.jpg
holotype illus-507.jpg
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