Catalog - Globotruncana (Rugoglobigerina) rotundata subrotundata Catalog - Globotruncana (Rugoglobigerina) rotundata subrotundata

CATALOG OF ORIGINAL DESCRIPTIONS: Globotruncana (Rugoglobigerina) rotundata subrotundata Gandolfi 1955

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 (Rugoglobigerina) -> Globotruncana (Rugoglobigerina) rotundata subrotundata
Other pages this level: G. (Rugoglobigerina) beldingi beldingi, G. (Rugoglobigerina) beldingi subbeldingi, G. (Rugoglobigerina) circumnodifer subcircumnodifer, G. (Rugoglobigerina) glaessneri glaessneri, G. (Rugoglobigerina) glaessneri subglaessneri, G. (Rugoglobigerina) hexacamerata subhexacamerata, G. (Rugoglobigerina) loetterli subloetterli, G. (Rugoglobigerina) macrocephala submacrocephala, G. (Rugoglobigerina) ornata subornata, G. (Rugoglobigerina) pennyi subpennyi, G. (Rugoglobigerina) petaloidea, G. (Rugoglobigerina) petaloidea subpetaloidea, G. (Rugoglobigerina) rotundata subrotundata

Globotruncana (Rugoglobigerina) rotundata subrotundata

Citation: Globotruncana (Rugoglobigerina) rotundata subrotundata Gandolfi 1955
Taxonomic rank: sub-species
Type specimens: PL 7, fig. la-c ; 20860: type description p.70
Type sample (& lithostrat): Km. 92 section, S. 5597.
Type age (chronostrat): Campanian-Maastrichtian
Type locality: A section near Km. 92 on the Fonseca-Riohacha road, Rancheria Valley, 40 km. north of Fonseca, NE part of the State of Magdalena, northern Colombia.
Type repository: Ithaca, New York; Paleontological Research Institution

Current identification/main database link: Kuglerina rotundata (Bronnimann, 1952)


Original Description

Large, subspherical test, with inflated umbilical side and inflated chambers which become more and more elongated in the axial direction. The surface is rough, particularly in the early chambers, but a distinct keel fringes the early chambers of the last volution in a discontinuous way. The umbilical cavity appears to be larger than in the original figure of Rugoglobigerina rugosa rotundata, (Bronnimann) and is provided with umbilical lips.

Size:
Dimensions of holotype: Width 0.88 x 0.85 mm.; thickness, 0.56mm

Extra details from original publication
Remarks.—Plate 6 fig 8, suggests that Glt. gansseri gansseri undergoes a process of "globigerinization" like other Globotruncana forms. The fact that the few tests of Glt. gansseri gansseri show a tendency toward a more trochoidal coiling and toward more elongated end-chambers supports the opinion that Rugoglobigerina rotundata rotundata is an offshoot of Glt. gansseri gansseri and appears genetically separated from Rugoglobigerina rugosa rugosa.

References:

Gandolfi, R. (1955). The genus Globotruncana in northeastern Colombia. Bulletins of American Paleontology. 36: 1-118. gs


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Globotruncana (Rugoglobigerina) rotundata subrotundata compiled by the pforams@mikrotax project team viewed: 19-5-2026

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