Deroceras (Deroceras) chevallieri Altena, 1973
Look alikes:
juvenile Deroceras reticulatum.
Morphology:
External: Cream body with black spots, forming reticulations on tail; keel also spotted (Wiktor 2000).
Internal: Rounded penis with pigmented apex; penial gland is two branching tufts; vas deferens attached between penial glands on side of penis apex; retractor muscle strong and attached on penis near glands and vas deferens; tongue-shaped flat stimulator in penis; ovate spermatheca with a distinct, thin duct; long rectal caecum (De Winter 1986; Wiktor 2000).
Similar to juvenile D. reticulatum (Wiktor 2000).
Size:
To 31 mm long (De Winter 1986).
Distribution:
Only France (department Vaucluse) (De Winter 1986).