Shell: small to moderately small, solid, Ovate to sub-pyriform, ranging from 10-26 mm.
Spire concealed. Teeth: 12 to 16 columellar teeth; 12 to 17 labral teeth.
Sculpture: smooth, porcelaneous; margins calloused and pitted along upper edge; labral teeth strong extending across to the margin.
Aperture elongate, narrow, slightly wider at anterior.
Exterior colour orange tan; dorsum dusted with white spots and larger, diffuse brown spots; base orange to tan, darker centrally; margins orange, becoming darker towards the dorsum; canals mauve. Mantle line weak.
Specimens
Gneerings Shoal, Australia Size: 21.06mm Collected: Unknown Collected from under rocks on rocky reef at 10-15m by diver.
forma: citrinicolor (Iredale, 19335) This form from WA. Collumelar teeth shorter in the mid section; paleish basal callous; dorsum greenish; spotting often diffuse. Exmouth, Australia Size: 24.91mm Collected: 1990 No data
forma: citrinicolor This form from WA. Collumelar teeth shorter in the mid section; paleish basal callous; dorsum greenish; spotting often diffuse. South Passage, Shark Bay, Australia Size: 23.61mm Collected: Unknown Collected from under coral slabs on hard reef at 3-5m.
forma: citrinicolor This form from WA. Collumelar teeth shorter in the mid section; paleish basal callous; dorsum greenish; spotting often diffuse. Albany, Australia Size: 25.51mm Collected: Unknown Collected form under rocks at 10m.
Broome, Australia Size: 22.02mm Collected: Unknown No data
Bedout Island, Australia Size: 24.21mm Collected: Unknown No data
Grand Central Station, Solomon Islands Size: mm Collected: 1998 found on coral reef in 2m of water under a rock
Asau, Western Samoa Size: 15.89mm Collected: 2019 Collected from dead plate coral at 3-5 m at night. Very uncommon in Samoa
Man Friday Resort, Fiji Size: mm Collected: 1997 found dead on coral reef in 2m of water
Subspecies: Naria helvola bellatrix (Lorenz, 2009) This subspecies from the Marquesas Islands. Rhomboid, collumellar teeth longer often extending across extremities; extremities stained white. Taioha'e Bay, Marquesas Size: 20.52mm Collected: Unknown Collected from under rocks on rubble slopes at 15-20m by diver.
Mactan Island, Philippines Size: 10mm Collected: 2017 collected by diver 20-30 m depth
Home Island, Indonesia Size: 24.18mm Collected: Unknown Collected from rubble at extreme low tide. Small Indian Ocean form
Mios Andau Kecil, Indonesia Size: 24.88mm Collected: Unknown Collected from coral , sand patches and rubble at 30m by diver.
Transkei, South Africa Size: 26.32mm Collected: Unknown Collected from under slabs on shallow rocky reef.
forma: argella This form from East Africa; calloused; chestnut base with dark purple tips. Tanzania [unspecified], Tanzania Size: mm Collected: 1985 swapped
forma: argella This form from East Africa; calloused; chestnut base with dark purple tips. Toliara, Madagascar Size: 18.49mm Collected: Unknown Collected at low tide.
Oahu, United States of America Size: 14.62mm Collected: Unknown Collected by scuba diver.
Subspecies: Naria helvola hawaiiensis (Melvill, 1888) This subspecies from Hawaii. Calloused; white with dark brown spots on pinkish background; base brown to pink; tips lilac; collumelar teeth short. Oahu, United States of America Size: 21.83mm Collected: 1996 Collected from under coral and rocks at 3-5m by diver.
