Deroceras (Deroceras) heterura Pilsbry, 1944
Morphology:
External: Narrow body; "umber"-colored dorsum and mantle; sharply truncated tail end; 3-part sole "cinnamon-buff" with darker side sections (Pilsbry 1948).
Internal: Long, cylindrical penis with a narrowed apex; one side wall of penis thicker than the other; retractor muscle attached to penis apex, with vas deferens attached laterally nearby; only fine fingerprint-like grooves in internal penis; short rectal caecum (Pilsbry 1948).
Size:
~35 mm long, ~ 3 mm wide (Pilsbry 1948).
Distribution:
New Mexico (USA) (Pilsbry 1948).
Type Locality: Sawyer Peak, Black Range, Grant Co, New Mexico (USA) (Wiktor 2000).