Tandonia nigra. A–F sequenced topotype NMBE 569047, Monte Generoso, Rovio, Calvagione, 1.650 m alt A lateral view right B dorsal view C ventral view D lateral view left E dorsal view showing the postpallial pocket organ (indicated with arrows) F lateral right view of mantel with pneumostome. Abbreviation: ppo = postpallial pocket organ.

  Part of: Schallenberg VM, Heim R, Schneppat UE, Müller P, Rüetschi J, Neubert E (2022) Revision of the family Milacidae from Switzerland (Mollusca, Eupulmonata, Parmacelloidea). ZooKeys 1116: 149-179. https://doi.org/10.3897/zookeys.1116.82762