Opalia zelandica
Opalia zelandica is a species of very small deepwater sea snail, a marine gastropod mollusk in the family Epitoniidae, the wentletraps. Distribution
This marine species is endemic to New Zealand. References

 Powell A. W. B., New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 
 Spencer, H.G., Marshall, B.A. & Willan, R.C. (2009). Checklist of New Zealand living Mollusca. pp 196–219 in Gordon, D.P. (ed.) New Zealand inventory of biodiversity. Volume one. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. Canterbury University Press, Christchurch. Epitoniidae
Gastropods of New Zealand
Gastropods described in 1930