Diloma aethiops, whose common names include scorched monodont, spotted black topshell, and in the Māori language pūpū, pūpū-mai, or māihi[1] is a species of small sea snail, a marine gastropod mollusc in the family Trochidae, subfamily Monodontinae.

The outer lip is edged with blackish, then nacreous, and lined with opaque white, the thickening slightly notched at the place of the periphery.

The oblique columella is nearly straight, flat, opaque white and backed by nacreous.

[3] Animal: The foot is yellow below, with a brown stripe round the contour, black on the sides, with touches of yellowish-white behind; filaments greenish; mouth yellowish.

In harbours or estuaries it often occurs with D. subrostrata on hard packed mud among empty bivalve shells.