CATALOG OF ORIGINAL DESCRIPTIONS: Globotruncana lapparenti longilocula 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 lapparenti longilocula
Other pages this level: << < G. helvetica posthelvetica, G. hilli, G. imbricata, 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, G. linneiana obliqua, G. linneiformis, G. lobata, G. loeblichi, G. loefgreni, G. lugeoni, G. lugeoni angulata, G. lunaris, G. marginata austinensis, G. marianosi, > >>

Globotruncana lapparenti longilocula

Citation: Globotruncana lapparenti longilocula Gandolfi 1955
Rank: sub-species
Type locality: Cesar Valley, Rio Manaure, 100 km. ESE of La Paz; northern Colombia
Type age: Campanian-Maastrichtian
Type sample and level: Manaure section, S. 9168.
Holotype Repository: Ithaca, New York; Paleontological Research Institution
Type & figured specimens: PI. 1, fig. 1, Text figs. 3,4 (8a-b) : type description p.17

Current identification/main database link: Globotruncana linneiana (dOrbigny 1839)


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. Bulletin of American Paleontology. 36: 1-118. gs


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Globotruncana lapparenti longilocula compiled by the pforams@mikrotax project team viewed: 30-3-2020

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