Semicassis thomsoni is a species of large predatory sea snail, a marine gastropod mollusc in the family Cassidae, the helmet shells and their allies.MolluscaBase eds. (2022). MolluscaBase. Semicassis thomsoni (Brazier, 1876). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=591489 on 2022-05-21
Distribution This marine species occurs in New Zealand.Powell A. W. B. (1979). William Collins Publishers Ltd, Auckland . and in the Australian part of the Tasman Sea.
References
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.
External links
Brazier, J. (1876). Fourteen new species of terrestrial, fluvatile, and marine shells from Australia and the Solomon Islands. Proceedings of the Linnean Society of New South Wales. 1 (1): 1-9