Catalog - Candeina amicula Catalog - Candeina amicula

CATALOG OF ORIGINAL DESCRIPTIONS: Candeina amicula Takayanagi & Saito 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 -> C -> Candeina -> Candeina amicula
Other pages this level: C. amicula, C. antarctica, C. biloba, C. cecionii, C. milletti, C. nitida, C. nitida praenitida, C. nitida triloba, C. somaliensis, C. triloba, C. zeocenica

Candeina amicula

Citation: Candeina amicula Takayanagi & Saito 1962
taxonomic rank: species
Type specimens: IGPS coll. cat. no. 75026; Pl. 28, figs. 13a-c
Type sample (& lithostrat): sample A-6. Nobori Formation
Type age (chronostrat): Miocene, Tortonian
Type locality: IGPS (Institute of Geology and Paleontology, Sendai) locality no. Ko-25; 33°22'09" N., 134°03'33" E. A cliff, 100 meters east of Nobori, Muroto City, Kochi Prefecture, Shikoku, Japan.
Type repository: Sendai; Deposited in the collections of the Institute of Geology and Paleontology. Tohoku University, Sendai, Japan:

Current identification:


Original Description

Test free, subglobular, trochospiral, consisting of rapidly enlarging chambers in a low spire; chambers subglobular to hemi-spherical, all visible on spiral side, about four chambers in early whorl, later becoming three in final whorl, last-formed chamber strongly embracing and occupying nearly one half of final whorl; sutures distinct, slightly depressed, radial to slightly curved; wall calcareous, finely perforate, radial in structure, surface pitted; primary aperture in early stage interiomarginal, umbilical, later small supplementary sutural apertures develop on each side of primary aperture, in adult tests primary opening is replaced by small round to short slit-like ones situated at later sutures

Size:
Maximum diameter of holotype 0.29 mm., maximum thickness 0.27 mm. Other specimens range from 0.17 to 0.22 mm. in maximum diameter.

Extra details from original publication
Remarks: This species is similar to Candeina nitida var. triloba Cushman in general outline and surface of the test which is rougher and more punctate than C. nitida d'Orbigny. However, according to Cushman (1921, p. 296), C. nitida var. triloba is distinguished from the typical by that the last three chambers composed the whole external surface of the test. In this respect, it is considered to be not adequate to include Cushman's variety under the genus Candeina, and C. amicula, n. sp. will be easily distinguished from the former by its chamber arrangement on spiral side.

Occurrence: Very rare.

References:

Takayanagi, Y. & Saito, T. (1962). Planktonic foraminifera from the Nobori formation, Shikoku, Japan. Science Reports of the Tohoku University. 2(5): 67-105. gs


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Candeina amicula compiled by the pforams@mikrotax project team viewed: 3-3-2024

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