Fig. 10 in Early ontogeny and palaeoecology of the Mid-Miocene rissoid gastropods of the Central Paratethys

Fig. 10. Two species of Mohrensternia Stoliczka, 1868. A, B. Mohrensternia inflata (Hörnes, 1856). A. Specimen (NHMW 2002z0029/0005) from the Early Sarmatian of Hollabrunn. B. Specimen (NHMW 2002z0029/0006) from the Early Sarmatian of Vienna−Nussdorf. Protoconch in lateral (B2) and apical (B3) views. The embryonic shell is separated from the subsequent larval shell by a slightly thickened rim. The onset of the teleoconch is indicated by the formation of weak axial folds, grading into regular axial ribs. C. Mohrensterniamoesinensis Jekelius, 1944. Specimen (collection A. Papp, NHMW 2002z0029/ 0008) from the Early Sarmatian of Eichkogel (C1). Lateral views of the protoconch of the same specimen as in C1 (C2, C3). The protoconch is terminated by a slightly projecting rim, which is slightly thickened in its adapical portion. Detailed apical view of the initial whorl of the same protoconch as in C3 (C4). The embryonic shell has fine spiral sculpture and it is terminated by a slightly thickened rim.