Orbulina
Descrizione
Questi organismi presentano un guscio sferico a camera singola, e perforazioni nelle pareti esterne.
Bibliografia
- (EN) Gibson, T. G., Key foraminifera from upper Oligocene to lower Pleistocene strata of the central Atlantic coastal plain, in Smithsonian Contributions to Paleobiology, vol. 53, 1983, pp. 355-453.
- (EN) Gross, O., Foraminifera, in Costello, M.J. et al. (Ed.), vol. 50, European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 2001, pp. 60-75.
- (EN) Sepkoski, J. J., A compendium of fossil marine animal genera, in Bulletins of American Paleontology, vol. 363, 2002, pp. 1-560.