FIGURES 46–54. Shells. Figs. 46–48 in New land mollusk fauna from Serra da Capivara, Piauí, Brazil, with a new genus and five new species (Gastropoda: Orthalicoidea, Streptaxidae, Subulinidae)

FIGURES 46–54. Shells. Figs. 46–48: Streptartemon molaris n. sp.; Fig. 46, paratype MZSP 111843 (W 7.6 mm), apertural view; Fig. 47, same, detail of aperture in slightly inferior view; Fig. 48, paratype MZSP 112366, young specimen (W 6.1 mm), apertural view; Fig. 49, Lamellaxis cf. gracilis, MZSP 112406, apertural view (L 7.1 mm); Fig. 50, same species, MZSP 112354, apertural view (L 8.6 mm); Figs. 50–54, Beckianum beckianum; Fig. 51, MZSP 112411 (L 6.5 mm), apertural view; Fig. 52, same, right view; Fig. 53, same, dorsal view; Fig. 54, MZSP 111542 (L 4.8 mm), apertural view; Fig. 55, dorsal view.