Tomopleura subtilinea is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.

On the body whorl are twenty-five spirals, of which seven are on the snout, besides uncounted threads, one in each of the broader furrows.

Numerous close-set radial threads lattice the spaces between the main spirals, but do not cross them.

Three spirals run along the fasciole, the outer rows of radial bars there contained are set in chevron.

[2] This marine species is endemic to Australia and occurs off New South Wales and Queensland