Distribution: Common in the Solitary Islands Marine Park. Endemic to Australia, recorded from New South Wales, Byron Bay to Twofold Bay and south western Western Australia.

Ecological Notes: Frequents subtidal areas among zoanthids. Depth from subtidal to 110 m.

Additional Notes: Note conical operculum and newly deposited egg mass on food source zoanthid, Zoanthus robustus. Grows to around 14 mm shell width.

References: The Seashells of New South Wales, Des Beechey, Senior Fellow, Australian Museum, Release 25. Website at https://seashellsofnsw.org.au/Architectonicidae/Pages/Heliacus_ponderi.htm. Accessed 07/11/2018.