Oonia kimmeridgiensis Gründel & Nützel, 2024, sp. nov.

Oonia kimmeridgiensis sp. nov. Plate 8: figs 6, 7 Etymology. After the Kimmeridgian stage. Holotype. SNSB-BSPG 2016 XXI 1791. Paratypes. 2 specimens, SNSB-BSPG 2016 XXI 1792 –1793. Type locality and stratum. Upper Jurassic (Kimmeridgian) reefal limestones from the locality Saal near Kelheim, Lower Bavaria (Gründel et al. 2015, 2022). Diagnosis. Shell slender, oval; spire whorls low; body whorl much higher than spire, with weakly, evenly convex whorl face. Description. Shell slender, oval, higher than wide; holotype 18 mm high; sutures distinct; body whorl nearly two times higher than spire, with weakly, evenly convex whorl face; periphery low on whorl; transition from whorl face to base evenly rounded; base stronly convex; shell smooth; growth lines weakly parasigmoidal; aperture incomplete, probably teardrop-shaped. Remarks. Similar species (e. g., Oonia guirandi Loriol in Loriol and Bourgeat 1886–1888, Pseudomelania (Oonia) cornelia (d’Orbigny) sensu J. – C. Fischer et al. (2001) and Fischer and Weber 1997, Ampullospira (Pictavia) calypso (d’Orbigny) sensu Fischer and Weber 1997) usually have higher spire whorls, but above all, a wider and more convex body whorl.