Discodorididae: Rostanga calumus Rudman & Avern, 1989 (‘fake sea-lemon’)

Synonym(s): calumus Rudman and Avern, 1989 arbutus Burn, 1957 non Angas, 1864.
Typical body-length 20 mm. Lives subtidally on sponges, specifically Axosuberites species, on which it feeds. Native. Endemic to southeastern and southwestern Australia (NSW, TAS, VIC, SA and WA).

no coastal locality records for this species currently available