Theodoxus baeticus (Lamarck, 1822). A–C. Paralectotype of N. baetica from Andalusia, Spain (MHNG-MOLL-51319). D) Operculum of a paralectotype of N. baetica from Andalusia (MHNG-MOLL-51319); E–G. Lectotype of N. baetica from Andalusia (MHNG-MOLL-51319); H–J; K; L; M; N. Five syntypes of N. meridionalis from Sicily (ZMB, without coll. no.); O–R. Topotype of N. guadianensis collected in the Guadiana River near Mértola, Portugal incorporated into the phylogeny (UGSB 22084); S–V. Specimen from Sóller, Balearic Islands used in the phylogeny (UGSB 19162). Scale bars: 1 mm.