Newly Identified Melanistic and Rostrate form of Monetaria caputdraconis from Easter Island

A newly discovered population of Monetaria caputdraconis has been identified on Easter Island. This new population has a high occurrence of specimens expressing morphologythat appear both melanistic and rostrate, and is named herein Monetaria caputdraconis formdarkini. It is suggested that the geology of the island, which comprises Roiho basalt containing olivine tholeiite with relatively high concentrations of heavy metals, may contribute to this unique morphology