Gigantomilax O. Boettger, 1883
Morphology:
External: Mantle 1/3 body length; pneumostome medial or post-medial on mantle (Schileyko 2003).
Internal: Short vas deferens; penis short and cylindrical; large stimulator in penis; sphincter in penis near base; large spermatheca with short duct; no vagina (Schileyko 2003).
Size:
To 56 mm long contracted (100 mm long in one species) (Schileyko 2003).
Distribution:
Caucasus Mts. and nearby parts of Iran and Turkey (Schileyko 2003).