CATALOG OF ORIGINAL DESCRIPTIONS: Acarinina triplex 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 triplex
Other pages this level: << < A. pentacamerata camerata, A. pentacamerata erevanensis, A. planodorsalis, A. praecursoria, A. primitiva, A. proxima, A. pseudosubsphaerica, A. pseudotopilensis, A. punctocarinata, A. quadratoseptata, A. rotundimarginata, A. rugosoaculeata, A. subintermedia, A. subpentacamerata, A. tadjikistanensis djanaensis, A. triplex, A. umbilicata, A. vedica

Acarinina triplex

Citation: Acarinina triplex Subbotina 1953
Rank: Species

Current identification/main database link: Acarinina coalingensis (Cushman and Hanna 1927)

Original Description
[Translation from the Russian. - Test strongly inflated, nearly spherical, with a broadly rounded peripheral margin. Consists of two to two and one-half whorls, with three to four chambers in each whorl. Dorsal side, as in all Globorotalias, is flattened, ventral side strongly convex and semispheric. [Peripheral margin very broadly rounded, completely smooth or slightly sinuous. Chambers rapidly increasing in size, very closely attached to each other, due to which the whole test has a very compact structure. The chambers are almost at right angles to each other; the final chamber often makes up about one-half of the whole test, being separated from the others by equatorially arranged septal sutures which have the appearance of deep furrows. Early chambers are usually barely distinguished because of the dense spinosity of the wall. In those specimens in which they are well defined, their rotaloid arrangement is visible. On the dorsal side the chambers have a rim-like form with an oval outline. On the ventral side the chambers are of a rounded or triangular shape. Sometimes, instead of a junction of two adjacent chambers, an exterior protuberance is formed, due to which the following chambers extend beyond the general outline of the test. [Sutures very deep, weakly curved. Umbilicus indistinct, small, because the umbilical ends of the chambers, which in this instance might rather be called edges in view of their broadly rounded outline, are closely adjacent to each other. However, in instances in which the umbilical ends (edges) of the chambers are in various planes, the umbilicus is well defined. [The aperture is slit-like, along the marginal suture, extending from the umbilicus to one-half the distance between the umbilicus and the peripheral margin. Usually the aperture is concealed by the convexity of the chamber. The wall is coarsely spinose. On the ventral side, the spines are often larger than on the dorsal.


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 V O

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


Acarinina triplex compiled by the pforams@mikrotax project team viewed: 19-1-2021

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