External morphology and digestive system, Onchidium melakense, Peninsular Malaysia A–C holotype [5979] (USMMC 00075) D [5978] (USMMC 00076) A dorsal, anterior view B posterior, ventral view (dotted lines indicate where the foot was cut to show the anus) C digestive system, dorsal view D digestive system, dorsal view. Abbreviations: a anus, ddg dorsal lobe of digestive gland, f foot (pedal sole), fo female opening, h hyponotum, i intestine, mo male opening, ol oral lobe, ot ocular tentacle, p pneumostome, pdg posterior lobe of the digestive gland, ppg peripodial groove, rg rectal gland, st stomach, tp transversal protuberance (on oral lobe). Scale bars: 5 mm (A–C), 3 mm (D).