Smilium spinosa (Quoy & Gaimard, 1834)
This is not a Mollusc. Other non-Molluscan Phyla (Echinodermata, Brachiopoda etc) have been included to help identify species that may be mistaken for Mollusca, but are not.
Arthropoda (Phylum) > Crustacea (Subphylum) > Hexanauplia (Class) > Thecostraca (Subclass) > Scalpelliformes (Order) > Calanticidae
(Family) > Smilium
(Genus) > spinosa (Species)
Throughout New Zealand
Marine, Endemic, On intertidal rocks, often under shady ledges