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Family “ Alveolinidae”
Genus “ Borelis”
Reichel, M., 1937, Mém. Soc. Paléontol. Suisse, 95-147
Holzmann M., Hohenegger J., Hallock P., Piller W.E., Pawlowski J., 2001, Mar. Micropal., 43, 57-74
The genus Borelis possesses spherical to fusiform tests, chambers are divided into chamberlets. Multiple apertures occur in a single row. Living specimens appear brownish in colour due to diatom endosymbionts