Anadenus Heynesmann, 1862
Anadenus should probably be in a separate family from the North American anadenid genera Prophysaon andAnadenulus (Wiktor 2001).
External: Thick-set body; white, brown, or orange-ish body, with a pale ovate mark on the posterior middle of the mantle; sometimes with darker mantle markings, lateral streaks, and/or tiny black spots all over; granulated mantle, <1/3 body length; pneumostome anterior or at mantle midline; 1-part sole (Wiktor 2001)
Internal: Thin internal shell; penis and epiphallus present; epiphallus long, cylindrical, widest in the middle, coiled; penis cylindrical or club-shaped, sometimes with an appendix; penial retractor at its apex and usually surrounding junction with vas deferens; cylindrical free oviduct; large spermatheca with thick duct (Wiktor 2001).
Asia, mostly the Himalayan region (S China, Nepal, N India, Kashmir, Pakistan) (Wiktor 2001).
Fairly high in the mountains, observed to 4200 m altitude; takes shelter under stones (Wiktor 2001).
Feeds on plants or fungus, or possibly omnivorous (Wiktor 2001).