Uncommon in the Solitary Islands Marine Park. Distributed throughout the Indo-Pacific region, including Fiji, Vanuatu, Papua New Guinea, East Timor and Indonesia. In Australia recorded from Scott and Ashmore Reefs in Western Australia, the Great Barrier Reef and southern Queensland and Northern New South Wales.
Frequents Sarcophyton and Sinularia spp. soft corals where it feeds and lays its eggs. Depth to at least 80 m.
The shell is uniformly white, the mantle is reddish brown to black with small white spots and fewer larger dark spots. A small species often hidden in the folds or on the underside of its host soft coral. Similar Procalpurnus semistratus has small brown spots on its foot while this species has a netted pattern. Grows to around 20 mm.
Coral Reef Animals of the Indo-Pacific, Terrence M. Gosliner, David W. Behrens and Gary C. Williams, Sea Challengers Publication, Monterey, California. 1996. p.134.
Atlas of Living Australia website at https://bie.ala.org.au/search?q=procalpurnus+lacteus. Accessed 10/11/2018.