CATALOG OF ORIGINAL DESCRIPTIONS: Biticinella Sigal 1956

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 -> B -> Biticinella
Other pages this level: Badriella, Bandyus, Beella, Berggrenia, Bermudeziana, Biglobigerinella, Biorbulina, Biticinella, Blefuscuiana, Blowellus, Blowiella, Bolivina, Bolliella, Bollitruncana, Braunella, Bucherina

Biticinella ferreolensis Moullade 1961
= Globigerinelloides ferreolensis

Biticinella

Citation: Biticinella Sigal 1956
Rank: Genus
Type species: Anomalina. breggiensis Gandolfi, 1942.

Current identification/main database link: Biticinella Sigal, 1956

See also: Anomalina. breggiensis -type species;


Original Description

Translated from French: The study of samples from the Vraconian of Djebel Bejaoua, Tunisia yielded specimens belonging to the form described by Gandolfi under the name of Anomalina breggiensis that confirm a character already hypothesized on less good material: the chambers are prolonged, on both sides, by lamellar expansions which reveal, at their posterior edge, near the rim of the preceding chamber, an accessory intra-umbilical aperture; on one side, they are sometimes irregularly developed, as if this expresses the hidden asymmetry of the test
    This observation can be ranked as a morphological genus within the framework of a nomenclature of morphological plexuses. It belongs to a natural systematic group comprising certain Globigerina (sensu latu) with umbilical lamellar expansions but without accessory openings, the Ticinella (and Biticinella) with accessory openings, as well as the keeled Planomalina (at least Planomalina buxtorfi Gandolfi [Planulina buxtorfi, 1942]) and Thalmanninella-Rotalipora, respectively without, or with, accessory openings and with, or without, bilateral symmetry. This group is easily distinguished from another natural group, including other Globigerina which we can agree to consider as strains of Globotruncana, the Rotundina, the Globotruncana themselves and their globigerinoid forms, in which the lamellar expansions, when present, may well be homologous to those of the preceding group, but where the intraumbilical apertures (tunnel-shaped), when present, are not homologous to the preceding ones, because they are not accessory openings in intra- or sub-sutural position, but isolated portions of the umbilical part of the primary aperture.


Extra details from original publication
Nous avions mis en évidence le caractère distinctif de ces formes sur des topotypes (niveau 29) de l'espece de Gandolfi (provenant d'un matériel aimablement communiqué autrefois par M. Reichell, assez difficilement toutefois à cause de la dureté du remplissage ombilical, qu'il faut de toute façon dégager sous l'eau à l'aide de fines épines de cactus .

Le type reste Anomalina breggiensis; la synonymie que nous avions adoptée avec Anomalina bentonensis Morrow, d'après une analogie extérieure, est suspendue dans l'attente d'une nouvelle étude.

La multiplication des termes génériques que d'aucuns ne manqueront pas de reprocher, n'est regrettable que dans la mesure ou l'on ne reconnaît pas à ces morphogenres la valeur, tel un symbole mathématique, d'un raccourci d'expression entre spécialistes (ou non). Pour certains, ce seront les sous-genres, négligeables à loisir, des genres Rotalipora (choisi parce qu'il typifie bien le mode accessoire de l'ouverture) et Globotruncana, respectivement.

References:

Sigal, J. (1956). Notes micropaléontologiques nord-africaines. 4. Biticinella breggiensis (Gandolfi), nouveau morphogenre. Compte Rendu Sommaire des Séances de la Société Géologique de France. 3: 35-36. gs


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Biticinella compiled by the pforams@mikrotax project team viewed: 11-4-2021

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