The Micronesia black skink (Emoia arnoensis) is a species of lizard in the family Scincidae. It is found in Micronesia, likely limited within the Marshall Islands, Nauru, and Kosrae. There is debate on whether the Nauru population is a subspecies, due to its larger amount of middorsal scales.
Habitat E. arnoensis is strongly terrestrial, typically in thickly weeded or vine covered open habitats.
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