Catalog - Globotruncana japonica robusta Catalog - Globotruncana japonica robusta

CATALOG OF ORIGINAL DESCRIPTIONS: Globotruncana japonica robusta Takayanagi 1960

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 japonica robusta
Other pages this level: << < 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, G. linneiana obliqua, G. linneiformis> >>

Globotruncana japonica robusta

Citation: Globotruncana japonica robusta Takayanagi 1960
taxonomic rank: sub-species
Type specimens: IGPS coll. cat. no. 74982; Pl. X, figs. 5a--c
Type sample (& lithostrat): san1ple Ob-3. IGPS loc. no. Te-20; Uj of the Upper Yezo group, Lower Hetonaian

Current identification/main database link: Rugotruncana subcircumnodifer (Gandolfi, 1955)


Original Description

This subspecies differs from the typical G. japonica, in possessing comparatively larger test with distinct, robust, beaded double keels throughout all chambers, and suture which are raised and beaded, especially on the dorsal side. The surface of this form is often beaded and the coiling is almost dextral.

Size:
Maximum diameter of holotype 0.41 mm., minimum diameter 0.30 mm., rnaximunl thickness 0.17 mm.

Extra details from original publication
Occurrences of the samples studied: Rarely found in the upper part of the Lower Urakawan, and commonly in the Upper Urakawan to Lower Hetonaian of the areas studied, occurring frequently with G. japonica in the Upper Urakawan and Uppermost Urakawan

References:

Takayanagi, Y. (1960). Cretaceous foraminifera from Hokkaido, Japan. Science Reports of the Tohoku University. 32(1): 1-154. gs


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Globotruncana japonica robusta compiled by the pforams@mikrotax project team viewed: 23-4-2024

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