Catalog - Hedbergella trocoidea yezoana Catalog - Hedbergella trocoidea yezoana

CATALOG OF ORIGINAL DESCRIPTIONS: Hedbergella trocoidea yezoana Takayanagi&Iwamoto 1962

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 -> H -> Hedbergella -> Hedbergella trocoidea yezoana
Other pages this level: << < H. praelibyca, H. praelippa, H. praetrocoidea, H. pseudoplanispiralis, H. pseudotrocoidea, H. punctata, H. pustulosa, H. quadrata, H. ranzenbergensis, H. rischi, H. semielongata, H. sigali, H. similis, H. sliteri, H. telatynensis, H. trocoidea yezoana, H. velata, H. ventriosa, H. wondersi

Hedbergella trocoidea yezoana

Citation: Hedbergella trocoidea yezoana Takayanagi&Iwamoto 1962
taxonomic rank: sub-species
Type specimens: 75142
Type age (chronostrat): Albian
Type locality: From a cliff of an eastern branch of the Sekiyu-zawa, a northern tributary of the Horomui River, about 7630 meters S 12.5 degrees W of the Ikushumbetsu Station, and about 7070 meters S 40 degrees E of the Mikasa Station of the Poronae Railway Line, Iwaniz
Type repository: Tohoku, Japan; Institute of Geology & Paleontology, Tohoku University, Sendai, Japan

Current identification/main database link: Ticinella raynaudi Sigal 1966

Original Description

Test medium in size, low trochospiral, consisting of about two whorls, nearly flat to slightly concave on spiral side, broadly and rather deeply umbilicate on opposite side, periphery broadly rounded, peripheral outline distinctly lobulate; chambers inflated, subglobular to radially rather elongate, about seven to eight in final whorl, increasing gradually in size as added; sutures distinct, depressed, nearly radial on both sides; wall calcareous, perforate, radial in structure, surface smooth; aperture a low interiomarginal, extraumbilical-umbilical arch bordered above with or without a slight lip. Maximum diameter of holotype (fig. 2a-c) 0.38 mm., maximum thickness 0.16 mm. Maximum diameter of paratype (fig. la-c) 0.30 mm., maximum thickness 0.15 mm.

Editors' Notes
This name has been formally suppresed: 

ICZN, Opinion 2362 (Case 3620): Ticinella primula Luterbacher, 1963 (Foraminifera, Globigerinida, ROTALIPOROIDEA, ROTALIPORIDAE): specific name conserved, Bulletin of Zoological Nomenclature, vol. 72, no. 3, pp. 227-228, 2015.

Ruling (1) Under the plenary power the Commission has suppressed the specific name yezoana Takayanagi & Iwamoto, 1962, as published in the trinomen Hedbergella trocoidea yezoana, for the purposes of the Principle of Priority, but not for those of the Principle of Homonymy. (2) The specific name primula Luterbacher, 1963, as published in the binomen Ticinella primula, is hereby placed on the Official List of Specific Names in Zoology.


Takayanagi, Y. & Iwamoto, H. (1962). Cretaceous planktonic foraminifera from the Middle Yezo group of the Ikushumbetsu, Miruto, and Hatonosu areas, Hokkaido. Transactions and Proceedings of the Palaeontological Society of Japan. 45: 183-196. gs


Hedbergella trocoidea yezoana compiled by the pforams@mikrotax project team viewed: 18-7-2024

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Comments (2)



The case 3620 and decision (opinion 2362)by the International Commission of Zoological Nomenclature, should maybe be quoted here to explain the inverse priority between H. trocoidea yezona and T. raynaudi?



Jeremy Young(UK)

Good point - I will add that.