Catalog - Biorbulina


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

Biorbulina jedlitschkai Popescu 1987


Citation: Biorbulina Blow 1956
Rank: Genus
Type species: Globigerina bilobata d'Orbigny, 1846.
Described on page(s) : 69

Current identification/main database link: Orbulina d’Orbigny, 1839

Original Description
Test bilobate, with ultimate and penultimate chambers nearly spherical and similar in size. Penultimate chamber partially or completely embracing the earlier ones. Apertures multiple, a series of rounded openings that are distributed irregularly over the area of the last and penultimate chambers; some but not all of the apertures may be present in the sutures between the last, penultimate and earlier chambers. Wall calcareous, composed of more than one layer. Surface cancellate, with numerous regularly arranged minute perforations.

Extra details from original publication
Remarks: The new genus Biorbulina has been erected because of its distinctive morphology and its independent evolution from Globigerinoides bispherica. The penultimate chamber embraces the earlier chambers, whereas in Orbulina it is the ultimate chamber which embraces all the earlier chambers.


Blow, W. H. (1956). Origin and evolution of the foraminiferal genus Orbulina d'Orbigny. Micropaleontology. 2(1): 57-70. gs


Biorbulina compiled by the pforams@mikrotax project team viewed: 21-9-2021

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