Apatopygus recens (Milne Edwards, 1836)
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 actually are not.
Echinodermata (Phylum) > Echinozoa (Subphylum) > Echinoidea (Class)
> Euechinoidea (Subclass)
> Neognathostomata (Order)
> Apatopygidae (Family)
> Apatopygus (Genus)
From Far North to Wellington and around Stewart Island and the South Island excluding the West Coast, from 2-150 metres