Shell: small, solid, ovate to sub-pyriform, ranging from 10-18 mm.
Spire flattened, sometimes visible. Teeth: 15 to 17 columellar teeth; 14 to 19 labral teeth.
Sculpture: smooth, porcelaneous, columellar teeth extending across the base and onto the margin.
Aperture elongate, narrow, slightly wider at anterior.
Exterior colour cream with diffuse, irregular tan cloud on dorsum crossed by thin zig zag tan lines; base and margins cream.
Specimens
Subspecies: Palmadusta clandestina moniliaris (Lamarck, 1810) Western Pacific, Australia, Polynesia. Extremities short and calloused; teeth coarse, extending across the base; extremitis not stained darker; brown zigzag lines distinct and dense. Flat Rock, Australia Size: mm Collected: 1998 found whilst diving in 24m of water shell was dead
Myora light, Australia Size: 16mm Collected: 1997 No data.
Lamont Reef, Australia Size: 15mm Collected: 2019 Under rocks on weather edge of reef. At low tide.
Long reef, Australia Size: 13.18mm Collected: Unknown Collected from under intertidal rocks.
Subspecies: Palmadusta clandestina moniliaris (Lamarck, 1810) Western Pacific, Australia, Polynesia. Extremities short and calloused; teeth coarse, extending across the base; extremitis not stained darker; brown zigzag lines distinct and dense. Town of 1770, Australia Size: 18.99mm Collected: Unknown No data
Subspecies: Palmadusta clandestina moniliaris (Lamarck, 1810) Western Pacific, Australia, Polynesia. Extremities short and calloused; teeth coarse, extending across the base; extremitis not stained darker; brown zigzag lines distinct and dense. Langford Reef, Australia Size: 15.88mm Collected: Unknown Collected from amongst rubble on exposed reef at extreme low tide.
Cape levique, Australia Size: 18.75mm Collected: Unknown Collected from under large slabs of dead coral at low tide.
Port Moresby, Papua New Guinea Size: mm Collected: 1984 No data.
Mactan Island, Philippines Size: 10mm Collected: 2017 collected by diver 20-30 m depth
Subspecies: Palmadusta clandestina passerina (Melvill, 1888) Western Indian Ocean. Teeth restricted to aperture; dorsal zones purpleish grey; lines finer and often indistinct; extremities less calloused and stained with brown. Zanzibar, Tanzania Size: 16.49mm Collected: Unknown Collected from shallow reefs at low tide by local collectors.
