Late Jurassic (Upper Kimmeridgian) gastropods from Saal near Kelheim (Germany, Bavaria)

(1, 2) Diarthema aspera sp. nov., holotype, SNSB-BSPG 2016 XXI 1863, (1) lateral view, height 37 mm, (2) wing, height 16 mm. (3) Diarthema aspera sp. nov., paratype, SNSB-BSPG 2016 XXI 1864, lateral view, height 28 mm. (4) Diarthema aspera sp. nov., paratype, SNSB-BSPG 2016 XXI 1865, aperture, height 35 mm. (5, 6) Aporrhaidae gen. inc. schlosseri (Loriol in Loriol and Bourgeat 1886–1888), SNSB-BSPG 2016 XXI 1871, (5) lateral view, height 38 mm, (6) columellar section, height 32 mm. (7–9) Gen. indet. schlosseri (Loriol in Loriol and Bourgeat 1886–1888), SNSB-BSPG 2016 XXI 1872, (7) lateral view, height 35 mm, (8) last two whorls, height 19 mm, (9) basal view, width 16 mm (without wing), 23 mm (including wing). (10, 11) Gen. indet. monilitesta Zittel, 1873, SNSB-BSPG 2016 XXI 1874, lateral views, height 19 mm. (12–14) Gen. indet. sp. indet, SNSB-BSPG 2016 XXI 1875, apertural, apical and abapertural views, width of specimen 26 mm. (15, 16) Aptyxiella tricincta (Münster in Goldfuss, 1844), SNSB-BSPG 2016 XXI 1880, lateral view and columellar section, height 32 mm. (17, 18) Aptyxiella planata (Quenstedt, 1858), SNSB-BSPG 2016 XXI 1889, (17) longitudinal section, height 30 mm, (18) lateral view, height 48 mm.