Figure 13 from: Jochum A, Slapnik R, Klussmann-Kolb A, Páll-Gergely B, Kampschulte M, Martels G, Vrabec M, Nesselhauf C, Weigand AM (2015) Groping through the black box of variability: An integrative taxonomic and nomenclatural re-evaluation of Zospeum isselianum Pollonera, 1887 and allied species using new imaging technology (Nano-CT, SEM), conchological, histological and molecular data (Ellobioidea, Carychiidae). Subterranean Biology 16: 123-165. https://doi.org/10.3897/subtbiol.16.5758

Figure 13 - A Light micrograph showing the histological appearance of Zospeum sp. (Konečka zijalka) (CSR SASA 21675) with the mantel cavity (mc), mucus glands (mg), oesophagus (oe) bearing thick cuticular sheath (cs) and leading into the crop (c), the buccal ganglia (bg), and the cephalopodial portion of the reproductive system including penis (p) and vas deferens (vd) B Paired cerebral ganglia united by the cerebral commissure situated just dorsal to the origin of the oesophagus in the buccal mass.