CATALOG OF ORIGINAL DESCRIPTIONS: Globotruncana gansseri Bolli 1951

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 gansseri
Other pages this level: << < G. erevanica, G. falsocalcarata, G. falsostuarti, G. fareedi, G. flexuosa, G. fornicata, G. fornicata ackermanni, G. fornicata cesarensis, G. fornicata globulocamerata, G. fornicata manaurensis, G. fornicata motai, G. fornicata plummerae, G. fresnoensis, G. fundiconulosa, 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> >>

Globotruncana gansseri

Citation: Globotruncana gansseri Bolli 1951
Rank: Species
Type locality: Subsurface section in the Brighton area, near Pitch Lake, southwestern Trinidad. Found also in an outcrop in the river bed south of the bridge near mile post 12.5 on the Guaracara-Tabaquite Road, Lantern Estate, Central Range, Trinidad;
Type age (chronostrat): Maastrichtian
Type specimens: 59687
Type repository: Washington; USNM

Linked specimens: USNM-59687 USNM-59688

Current identification/main database link: Gansserina gansseri (Bolli, 1951)


Original Description
"Test flat on dorsal side, ventrally strongly inflated. The chambers of the last whorl, usually five in number, surround a deep umbilicus. The suture lines on the dorsal side are curved and in many cases finely beaded. A distinct marginal keep separates the flat dorsal part from the inflated ventral side. Suture lines of the ventral side are slightly curved, indicating a slight overlapping of chambers. The wall, and particularly the ventral part of it, is somewhat rough or spiny."

Size: diameter, 0.53 mm.; thickness, 0.27mm

Extra details from original publication
The morphological habitus of G. gansseri seems in many ways closely related to G. helvetica from the Upper Cretaceous of Switzerland (Bolli, 1944, pp. 226-227, fig. 1, no. 9 to no. 12, pl. 9, figs. 6-8). G. gansseri appears to be less lobate, however, has fewer chambers, and the initial portion does not rise above the final chambers on the dorsal side as often occurs in G. helvetica. The latter species also has a very short life range, but occurs at the Cenomanian-Turonian boundary and is thus definitely older than G. gansseri. It probably originated from a Globigerina-like form, and the same has to be assumed for Globotruncana gansseri since no transitions between this characteristic species and others have been observed

References:

Bolli, H. M. (1951b). The genus Globotruncana in Trinidad. Journal of Paleontology. 25(2): 187-199. gs


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Globotruncana gansseri compiled by the pforams@mikrotax project team viewed: 26-11-2020

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