Trochidae – Umboniinae: Leiopyrga octona (Tate, 1891) (‘octona top-shell’)
Synonym(s): octona Tate, 1891 problematica Iredale, 1924.
Typical shell-length 12 mm. Lives subtidally in sand. Native. Endemic to southeastern and southwestern Australia (NSW, TAS, VIC, SA and WA).