Spisula discors Gray, 1873 Width 90mm, Height 80mm, Thickness 45mm Large Trough Shell, Marine, Endemic, Darker, more inflated than Mactra murchisoni. Colour white under a dark brown periostracum North, South and Stewart Island ACFE. |
Spisula murchisoni Deshayes, 1854 Width 98mm, Height 80mm Marine, Endemic, Wider, less inflated than Mactra discors. More laterally ovate, inequilateral, has transverse plications on the lateral teeth, and the periostracum is always pale straw colour North, South and Stewart Island. On exposed sandy beaches ACFE. |