Nihoa trapdoor spider

The Nihoa trapdoor spider (Nihoa mahina) is a species of trapdoor spider in the family of Barychelidae that occurs on the island of Nihoa, Hawaii in the northwestern area of the Hawaiian island chain. Its scientific name can be broken up into two parts, Nihoa which is not only its place of origin but the name of its genus, and mahina, which means 'moon' in the Hawaiian language. This could tie back to the fact that the species was discovered not only in the moonlight but also has fine silver hair, resembling its namesake. The species can also be distinguished by a pattern found on its dorsal and the absence of a second row of teeth. Burrows of trapdoor spiders can commonly be found by mangrove roots or near loose coral rubble. Before the 1980s, trapdoor spiders were not thought to exist in Hawaii. Upon their discovery, the genus was given the name Nihoa, because it was assumed not to exist elsewhere.