Tandonia jablanacensis (Wagner, 1930)
T. jablanacensis was only observed and recorded by Wagner. Its ecology, habitat, and full range are unknown (Wiktor 1996).
Exterior: Narrow-bodied; dorsum and mantle black, with gray-yellow mantle edges and ochre under mantle, on neck, lower on sides; border between spermatheca and duct indistinct; keel along entire dorsum; sole yellowish with gray-yellow sides (Wagner 1930 in Wiktor 1996).
Interior: Epiphallus longer than penis, 1/2 its width; short oviduct; extremely large spermatheca+duct, 1.5x length of spermoviduct and wider, and with no differentiation between duct and spermatheca; vagina relatively long and cylindrical; small accessory glands; tubular atrium (Wagner 1930 in Wiktor 1996).
To 48 mm long, 9.5 mm wide, mantle 13.5 mm long (Wiktor 1996).
Croatia (Wiktor 1996).