Catalog - Globotruncana intermedia difformis Catalog - Globotruncana intermedia difformis

CATALOG OF ORIGINAL DESCRIPTIONS: Globotruncana intermedia difformis 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 -> Globotruncana intermedia difformis
Other pages this level: << < G. gagnebini, G. gansseri, G. gansseri gandolfii, G. gansseri subgansseri, G. globigerinoides, G. goudkoffi, G. hanzawai, G. havanensis, G. helvetica, G. helvetica posthelvetica, G. hilli, G. imbricata, G. indica, G. inornata, G. intermedia, G. intermedia difformis, G. japonica, G. japonica robusta, G. kuepperi, G. lakrai, G. lamellosa, G. lapparenti, G. lapparenti coronata, G. lapparenti depressa, G. lapparenti inflata, G. lapparenti longilocula, G. leupoldi, G. linnei angusticarenata, G. linnei bulloides, G. linnei caliciformis, G. linnei stuarti> >>

Globotruncana intermedia difformis

Citation: Globotruncana intermedia difformis Gandolfi 1955
taxonomic rank: sub-species
Type specimens: PI. 3, figs. 4a-c, 5a-c ; 20842: type description p.49
Type sample (& lithostrat): Manaure section, S. 9167B.
Type age (chronostrat): Campanian-Maastrichtian
Type locality: Cesar Valley, Rio Manaure, 100 km. ESE of La Paz; northern Colombia
Type repository: Ithaca, New York; Paleontological Research Institution

Current identification/main database link: Abathomphalus intermedius (Bolli, 1951)


Original Description

Test more convex on the dorsal side, chambers elongated, arched, tending to become petaloid and strongly oblique to the plane of coiling in the adult stage. They are rapidly inflated but irregularly increased so that the second chamber is considerably developed, often bigger than the last one. The sutural elevations are round and thick, being absent on the ventral side. A large, blunt, thick peripheral keel is present which splits somewhat into equally rounded blunt keels in the early stages. The test is rough and the umbilicus narrow. The presence of an umbilical lip could be observed through the hard matrix filling the umbilical cavity (fig. 5-b).

Size:
Dimensions of holotype: Width 0.44 x 0.35 mm.; thickness, 0.25 mm.

Extra details from original publication
Remarks.—The form is closely related to Glt. intermedia intermedia Bolli which differs because of its more regular arrangement of chambers and its finely beaded, not so strongly diverging keels.

References:

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


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Globotruncana intermedia difformis compiled by the pforams@mikrotax project team viewed: 20-6-2024

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