Papp, A. and Schmid, M.E. (1985). The fossil foraminifera of the Tertiary Basin of Vienna. Revision of the monograph by Alcide d'Orbigny (1846). Abhandlungen der Geologischen Bundesanstalt. 37, 311 p., available online at (https://opac.geologie.ac.at/ais312/dokumente/AB0037_001_A.pdf) page(s): p. 73 pl. 63 fig. 5-9 Fig. 5 Fig. d'Orbigny 1846, Plate 11, figs. 19, 20 Figs. 6,7 Side views of small tests Fig. 8 Side view of a test of the B-generation (lectotype) Fig. 9 Detail of wall of Fig. 8