Shell: small to moderately small, solid, ovate to sub-pyriform, ranging from 15-30 mm.
Spire concealed. Teeth: 9 to 12 columellar teeth; 9 to 15 labral teeth.
Sculpture: smooth, porcelaneous.
Exterior colour cream; dorsum cream, pale blue or tan with yellow orange ring; base and margins cream; mantle line indistinct.
Specimens
Myora light, Australia Size: mm Collected: 1989 under coral slab in 50cm of water on snad, mud and coral rubble bottom 0.4m tide
forma: olgae This form from Stradbroke island has orange brown blotches at the extremities and dorsum due to tannins in the water. Stradbroke Island, Australia Size: 20.04mm Collected: Unknown On sea grass in intertidal sand pool.
Amity Point, Queensland, Australia Size: 22.24mm Collected: Unknown Collected from weedy sand pools on intertidal sand flats with shallow pools by hand [low tide]. Collected by Callum Woodward 15/5/1999
Lady Musgrave Island, Queensland, Australia Size: 15.76mm Collected: Unknown Collected from under rocks on intertidal coral reef by hand [low tide]. Collected by Robert Ellis 23/8/2003
Lamont Reef, Australia Size: mm Collected: 2019 Under rocks on weather edge of reef at low tide. Common in the area.
Perfect Lagoon 21-186, Australia Size: mm Collected: Unknown on reef in 2m of water
Twin Cays Reef 21-166, Australia Size: 19mm Collected: 2011 Live collected under intertidal rocks.
Dingo Beach, Australia Size: 30mm Collected: Unknown Live collected under intertidal rocks.
forma: camellorum Rochebrune, 1884 This form albinistic. Bushy Island, Australia Size: 22.95mm Collected: Unknown Collected form small hollows on shallow reef at extreme low tide.
Twin Cays Reef 21-166, Queensland, Australia Size: 20.33mm Collected: Unknown Collected from under coral slabs on intertidal reef by hand [low tide]. Collected by Robert Ellis 27/9/2000
Minnie Waters, Nth Headland, Australia Size: mm Collected: 1989 found at low tide on rocky reef grey mantle
Norfolk Island, Australia Size: 24.81mm Collected: Unknown No data
Cocos & Keeling Islands, Australia Size: 22.18mm Collected: Unknown No data
Port Hedland, Australia Size: 26.63mm Collected: 1965 No data
Grand Central Station, Solomon Islands Size: mm Collected: 1998 found dead in sand on coral reef there were numerous other live specimens see dive log #28
Port Moresby, Papua New Guinea Size: mm Collected: 1984 under coral rocks on coral reef
Rabaul- Old, Papua New Guinea Size: 15mm Collected: 1965 On rubble under dead coral. Dwarf form.
Manus Island, Papua New Guinea Size: 22.3mm Collected: Unknown No data
Noumea, New Caledonia Size: 21.63mm Collected: Unknown Collected from rubble on shoreline at low tide.
forma: noumeensis (Marie, 1869) The most easternmost race ranging from Ogasawara Islands and Botany Bay to East Polynesia Viti Levu, Fiji Size: 29.55mm Collected: 1973 Collected from exposed sand and reef at low tide.
Man Friday Resort, Fiji Size: mm Collected: 1997 found dead in sand and sea grass, also saw a number of live specimens in the same area, water had some silt in it. 1 meter of water and less.
Nadi, Fiji Size: 16.05mm Collected: Unknown Collected from under dead coral at low tide.
Tahiti, French Polynesia Size: 21.83mm Collected: Unknown Collected from algae covered smashed coral rubble on reef top at low tide.
Tonga, Tonga Size: 21.54mm Collected: Unknown No data
forma: noumeensis (Marie, 1869) This form has a broad, conspicuous ring Pango, Vanuatu Size: 15.52mm Collected: Unknown No data
Perhentian Island, Malaysia Size: 23.92mm Collected: Unknown NO data
Subspecies: Monetaria annulus alboguttata Bozzetti, 2015 Alas Purwo, Indonesia Size: 25.7mm Collected: Unknown Collected on intertidal reef by hand [low tide] at low tide.
Pangani, Indonesia Size: 26.38mm Collected: Unknown No data
, Indonesia Size: 15.13mm Collected: Unknown Collected from under rocks on intertidal reef by hand [low tide].
Sanur Beach, Indonesia Size: 17.74mm Collected: 1984 Collected form sand and rubble.
forma: scutellum Schilder & Schilder, 1937 the eastern part of the Indian Ocean and Red Sea are occupied by C. a. scutellum Schilder & Schilder, 1937 Eilat, Israel Size: 21.81mm Collected: Unknown Collected from rubble on exposed reef at low tide
forma: dilatissima This form from Oman. Often rhomboid;margins strongly calloused and separated from the dorsum by a depression Masirah Island, Oman Size: 26.84mm Collected: Unknown Collected from under dead coral slabs and rubble on exposed reef at low tide.
forma: appendiculata This variation has protuberances at the anterior end. Pemba Island, Tanzania Size: 25.39mm Collected: 2002 Collected from sand and rubble on exposed reef in shallow lagoon by local collectors
Bazaruto, Mozambique Size: 24.87mm Collected: Unknown No data
Nungwi, Tanzania Size: 22.52mm Collected: Unknown Collected from amongst weed and sand patches on exposed reef
Nosy Mangily, Madagascar Size: 27mm Collected: 2010 No data
Seychelles, Seychelles Size: 24.85mm Collected: Unknown No data
forma: camellorum Rochebrune, 188 Mauritius, Mauritius Size: 23.36mm Collected: Unknown No data
Natal SA, South Africa Size: 22.13mm Collected: Unknown No data
