Otala lactea (NMBE 553246), W Almocageme, Portugal; A shell B situs C penis and atrium; D = 29.82 mm, H = 18.71 mm, situs length 41.34 mm (atrium-BCD). All photographs by Kneubühler, shell × 1.5.

 
 
  Part of: Kneubühler J, Hutterer R, Pfarrer B, Neubert E (2019) Anatomical and phylogenetic investigation of the genera Alabastrina Kobelt, 1904, Siretia Pallary, 1926, and Otala Schumacher, 1817 (Stylommatophora, Helicidae). ZooKeys 843: 1-37. https://doi.org/10.3897/zookeys.843.32867