Poromyidae – Poromyinae: Poromya (Poromya) undosa Hedley & Petterd, 1906 (‘wavy spoon-shell’)
Synonym(s): undosa Hedley & Petterd, 1906.
Typical shell-length 5.9 mm. Lives in offshore waters. Native. Endemic to southeastern Australia (NSW and TAS). In Tasmanian waters, this species is currently known only from a single record offshore from the east coast.