Hiatula nitida (Gray, 1843)
Length 50mm, Height 25mm
Marine, Native - Endemic
North, South, Stewart and Chatham Islands. Low tide level to a few metres, from 0-15m

Hiatula siliquens Willan, 1993
Length 51mm, Height 28mm
Marine, Native - Endemic
Northern and south-western North Island, far northern and far southern South Island, and Banks Peninsula. Inhabits muddy sands of estuaries and harbours. Low tide level to a few metres, from 0-15m