"Maorithyas hadalis", holotype, NSMT 71431, length = 26.7 mm, height = 24.1 mm, width = 13.4 mm. A Exterior of right valve B Exterior of left valve C Dorsal view of both valves D Close up of periostracum of right valve E Interior of left valve F Interior of right valve G Close up of hinge of left valve H Close up of hinge of right valve.