Common in the Solitary Islands Marine Park. Distributed throughout the southwest Pacific region. In Australia it is recorded from all mainland states and northern Tasmania.
Recorded from intertidal rock pool areas where it shelters under rocks and boulders.
Shell is very flat with the apex at the posterior end. Colour extremely variable and including fawn, grey, green or black, with or without stripes or mottling. Shell interior silvery and iridescent. Observed to be fast moving once disturbed. (Pers.Obs. Ian Shaw). Shell length varies up to at least 25 mm.
The Seashells of New South Wales, Des Beechey, Senior Fellow, Australian Museum, Release 25. Website at
https://seashellsofnsw.org.au/Trochidae/Pages/stomatella_impertusa.htm. Accessed 11/11/2018.
Atlas of Living Australia website at https://bie.ala.org.au/search?q=Stomatella+impertusa. Accessed 11/11/2018.