Late Jurassic (Upper Kimmeridgian) Heterobranchia (Gastropoda) of the coral-facies of Saal near Kelheim and the viciniy of Nattheim (Germany)

(1–10) Itieroptygmatis cylindrata sp. nov., morphotype 1. (1–2) Holotype, SNSB-BSPG 2021 XV 80, Saal (collection Lang); (1) lateral view, height 15 mm; (2) oblique view, width 5.5 mm (Gründel 2017, fig. 15 B). (3–4) Paratype, SNSB-BSPG 2021 XV 81, Saal (collection Lang), apical and lateral views, width 14 mm. (5–6) Paratype, SNSB-BSPG 2021 XV 82, Saal (collection Lang), apical and lateral views, width 16 mm (original Gründel 2017, fig. 15 C). (7–8) Paratype, SNSB-BSPG 2021 XV 83, Saal (collection Lang), basal and lateral views, width 15 mm. (9–10) Paratype, SNSB-BSPG 2021 XV 84, Saal (collection Lang); (9) columellar section, height 16 mm; (10) detail of (9), height 7.5 mm. (11) Itieroptygmatis cylindrata sp. nov., transition from morphotype 1 to morphotype 2, paratype, SNSB-BSPG 2021 XV 85, Saal (collection Schäfer), lateral view, height 33 mm. (12–14) Itieroptygmatis cylindrata sp. nov., morphotype 2, paratype, SNSB-BSPG 2021 XV 86, Saal (collection Lang), (12) lateral view, height 27 mm; (13) apex in lateral view, height 12 mm; (14) apical, width 13 mm. (15–16) Itieroptygmatis sp. 1. (15) SNSB-BSPG 2021 XV 88, Saal (collection Lang), lateral view, height 47 mm. (16) SNSB-BSPG 2021 XV 89, Saal (collection Lang), base, width 21 mm.