Description
Animal limaciform, subcylindrical, blunt behind, with a but little developed mucous pore; mantle anterior, close to the head, concealing a shell-plate; a distinct locomotive disk; respiratory orifice on the right anterior margin of the mantle; genital orifice behind and below the right eye-peduncle. Shell-plate calcareous, ovate, small and solid. Jaw costulated; lingual dentition as in Arion.
The main diagnostic feature of the reproductive system differing from genera Arion, Letourneuxia and Ariunculus is, that species in the genus Geomalacus has atrium with diverticulum. The free oviduct is short; the retractor muscle is attached to the spermatheca duct; vas deferens and epiphalus are long.
Read more about this topic: Geomalacus
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