"Noumea romeri and Noumea simplex can only be separated externally by the presence of some orange pigment (as a spot, or dash, or a line) on the mantle edge in Noumea simplex (none in Noumea romeri)."
Comment from Richard Willan
Noumea romeri and Noumea simplex can only be separated externally by the presence of some orange pigment (as a spot, or dash, or a line) on the mantle edge in Noumea simplex (none in Noumea romeri).