Catalog - Dicarinella radwanskae Catalog - Dicarinella radwanskae

CATALOG OF ORIGINAL DESCRIPTIONS: Dicarinella radwanskae Gawor-Biedowa 1980

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 -> D -> Dicarinella -> Dicarinella radwanskae
Other pages this level: D. elata, D. jekeliana, D. longoriai, D. radwanskae, D. sudetica, D. takayanagii

Dicarinella radwanskae

Citation: Dicarinella radwanskae Gawor-Biedowa 1980
Taxonomic rank: species
Type specimens: pI. 6: 8-10; Holotype: specimen IG No. 45477/79/F, presented in pI. 6: 8a, b.; Paratypes: IG Nos. 45478/79/F, 45479/79/F; pl. 6: 9, 10.
Type age (chronostrat): Turonian
Type locality: Nysa Trough, borehole Pisary IG, depth of 580 m; SW Poland
Type repository: Warsaw; Geological Institute (abv IG)

Current identification:


Original Description

Diagnosis: Test low trochospiral, biconvex (more convex at the dorsal side than at the ventral one), circular to suboval lobulate in outline, consisting of 2.5 whorls, with 5 chambers in the last whorl; two weakly developed keels located very close to each other; umbilicus attaining at most one third of test diameter.

Description: Test low trochospiral, biconvex (a little more convex at the dorsal side than at the ventral one), sometimes a little twisted, consisting of 2.5 whorls. Early whorls make up one third of a test in diameter. Increase in chamber size slow and uniform throughout the ontogeny. In early whorls, chambers are spherical; in the last whorl chambers become lobate, a little more convex at the dorsal side. Septal sutures a little oblique, depressed, sometimes covered with indistinct roll-like swellings at the dorsal side; radial and considerably depressed at the ventral side. Test surface covered with uniformly spaced tubercles. Test circular to suboval, lobulate in outline. Periphery with two weakly developed keels situated very close to each other or even fused at some chambers. Keel may also appear at the periphery of the penultimate whorl (pl. 6: 8a; holotype). Umbilicus attains at most one third of test diameter.

Size:
holotype 0.64m diameter, paratypes 0.53mm, 0.48mm

Etymology:
in honor of Mrs. Zofia Radwanska, student of the Upper Cretaceous macrofauna of the Nysa Trough.

Extra details from original publication
Variability.- Intraspecific variability consists in keel distinctness, occurrence of but a single keel at some chambers, presence or absence of keel at the penul- timate whorl and sutural slats at the dorsal side of a test, test twisting, and size relationship between the final chamber and the penultimate one

Remarks. - The species under discussion resembles Dicarinella sudetica sp. n. in keel development and test ornamentation but it differs from the latter species in its test outline, uniform increase in chamber size, presence of a slat at some sutures at the dorsal side of a test, and occurrence of a rudimentary keel at the penultimate whorl.

Distribution. - Poland: Sudetes (Nysa Trough) - Turonian.

References:

Gawor-Biedowa, E. (1980). Turonian and Coniacian foraminifera from the Nysa trough, Sudetes, Poland. Acta Palaeontologica Polonica. 25: 3-54. gs


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Dicarinella radwanskae compiled by the pforams@mikrotax project team viewed: 14-2-2026

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