Category: Invertebrate
Phylum: Mollusca
Class: Gastropoda
Family: Trochidae

Notes
A solid globular shell with a blunt spire and sculptured with fine spiral ridges. It has a greensih black exterior, with a green lip and yellow flecks on the body whorl (especially on young animals). The interior is dull white, and there can be a prominant basal tooth in the aperture of adult shells. Common in Northern NZ under boulders on semi exposed to sheltered rocky shores. It feeds on the microalagal films wich cover the surfaces of rocks and on seaweed. Commonly found with other Diloma sp.


References
NZ Coastal Marine Invertebrates; Vol 1