Figs 33–36. Genital anatomy of two individuals of A. ater s.l., morphotype BR: 33, 34 – SMNG p9431T2, Bogstrasse, Görlitz, DE (leg. 2001); 35, 36 – SMNG p23305, New Alresford, Hampshire, UK (leg. 2015). 33, 35 – genitalia oriented as when the slug is first opened, although these atria had already been opened but then folded back. Ligulas are shaded olive, and the funnel turquoise. Abbreviations: bd – bursa-duct, ep – epiphallus, la – lower atrium, ua – upper atrium, flf – flap of left flank, frf – flap of right flank, ov – oviduct

Published as part of Reise, Heike, Schwarzer, Anne-Katrin, Hutchinson, John M. C. & Schlitt, Bettina, 2020, Genital morphology differentiates three subspecies of the terrestrial slug Arion ater (Linnæus, 1758) s.l. and reveals a continuum of intermediates with the invasive A. vulgaris Moquin-Tandon, 1855, pp. 1-34 in Folia Malacologica 28 (1) on page 15, DOI: 10.12657/folmal.028.001, http://zenodo.org/record/4615365