Daudebardia rufa is a carnivorous semi-slug. It belong to the subfamily Daudebardiinae within the family Oxychilidae or it can be classified in a separate family Daudebardiidae.
They are uncommon, because they can not live in highly altered forest monocultures. They require sufficiently humid forests with enough leaf litter, logs and fallen wood. There should be enough prey such as earthworms and snails. Humid habitat is necessary, because they have no shell large enough to protect them against droughts. My Daudebardia rufa comes from Moravia, the Czech Republic.
The right side view looks like this. The large muscular body has some tubercles. There is visible a pneumostome (breathing pore) bellow the shell. The body length of this specimen is 17 mm.
The shell looks like this: