Geodorcus ithaginis

Description

Geodorcus ithaginis, the Mokohinau stag beetle, is a large flightless species of stag beetle in the family Lucanidae. It was described by Thomas Broun in 1893 after being discovered in the Mokohinau Islands by P. Stewart Sandager, a lighthouse keeper on the islands. The species survives only on the small unnamed island "Stack H", in an patch of vegetation the size of a living room, and is in extreme danger of extinction.