CATALOG OF ORIGINAL DESCRIPTIONS: Acarinina intermedia Subbotina 1953

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 -> A -> Acarinina -> Acarinina intermedia
Other pages this level: A. acarinata, A. boudreauxi, A. clara, A. compacta, A. crassaformis simulata, A. discors, A. falsospiralis, A. inaequiconica, A. indolensis, A. intermedia, A. interposita, A. kiewensis, A. mattseensis alticonica, A. mcgowrani, A. microsphaerica, A. multicamerata, A. multiloculata, A. pentacamerata acceleratoria, A. pentacamerata camerata, A. pentacamerata erevanensis, A. planodorsalis, A. praecursoria, A. primitiva, A. proxima, A. pseudosubsphaerica, > >>

Acarinina intermedia

Citation: Acarinina intermedia Subbotina 1953
Rank: Species
Type locality: Nalchik, along the Kuban River, in the Northern Caucasus, U.S.S.R
Type age: Paleocene
Type sample and level: Goryachy Klyuch horizon, zone of flattened Globorotalias
Holotype Repository: Leningrad; All-Union Petroleum Scientific Research Geological Prospecting Institute (VNIGRil, Lenin- g r a d
Type & figured specimens: holotype, no. 4095; and originals, nos . 3086, 3091 , 3089, 4096-4098.
Description on pages: 227

Current identification/main database link: Acarinina nitida (Martin 1943)

Original Description
Test of average dimensions, with an oval or rounded outline, flattened dorsal and convex ventral sides, and a rounded, slightly sinuous peripheral margin. Two whorls. First whorl very small in comparison with the second one, always situated below the second whorl. In the final whorl there are four to four and one-half and sometimes five chambers. Chambers in- crease rapidly in size. Chambers oval on the dorsal side and triangular ventrally. Sutures short on the dorsal side, slightly curved, depressed; on the ventral side, sutures are long and radial. Umbilical ends of chambers closely adjacent. Umbilicus a small depression. Aperture crescentic, along the marginal suture, extending from the umbilicus to halfway between the umbilicus and the peripheral margin. Wall coarsely spinose. Spines on ventral side coarser than on the dorsal.

Size: Diameter 0.22-0.35 mm.; thickness 0.08-0.20 mm.

Extra details from original publication
This species differs from its closest geologic predecessor, Acarinina conicotruncata (Subbotina) [Globorotalia conicotruncata, 1947] in the rounded peripheral margin, closely adjacent umbilical ends of chambers, and the less highly convex ventral side.

The number of chambers in the final whorl is variable, from four to five. The four-chambered tests are often reminiscent of Globorotalia crassata (Cushman) [Pulvinulina crassata, 1925], differing in the distinct Globigerina-like appearance of the test. The five-chambered tests are closest to Acarinina conicotruncata.


Berggren, W. A., Pearson, P. N., Huber, B. T. & Wade, B. S. (2006b). Taxonomy, biostratigraphy, and phylogeny of Eocene Acarinina. In, Pearson, P. N. , Olsson, R. K. , Hemleben, C. , Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 41(Chap 9): 257-326. gs :: ::

Subbotina, N. N. (1953). Foraminiferes fossiles d'URSS Globigerinidae, Globorotaliidae, Hantkeninidae. Bureau de Recherches Geologiques et Minieres. 2239: 1-144. gs :: ::


Acarinina intermedia compiled by the pforams@mikrotax project team viewed: 9-7-2020

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