Dosinia anus

Dosinia anus, commonly named the ringed dosinia, coarse dosinia, coarse biscuit shell and tuangi-haruru, in the Māori language, is a species of saltwater clam, a marine bivalve mollusc in the family Veneridae, the venus clams. The species is common to both of the main islands of New Zealand, where it is the largest and heaviest species in the genus, occasionally exceeding 80 mm in diameter. It buries itself in clean fine sandy substrata, sub-tidally down to 15 m deep.

Dosinia anus
A shell of Dosinia anus
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Venerida
Superfamily:	Veneroidea
Family:	Veneridae
Genus:	Dosinia
Species:	D. anus
Binomial name
Dosinia anus (Philippi, 1848)

An investigation into a potential surf clam fishery found this species to be the most abundant 'surf clam' (an informal grouping based on habitat) in the North Island, being replaced by members of the Mactridae in more southerly latitudes.^[1]