Xixuthrus

Xixuthrus is a small genus of long-horned beetles, found primarily on Pacific islands, including Indonesia, New Guinea, the Solomon Islands, and Fiji, and contains some of the largest living insect species, the giant Fijian long-horned beetle and the Taveuni beetle. These beetles have powerful jaws, and should be handled with care when alive. No scientists have yet seen a larva of this genus, although in Fiji, where three different species occur, the natives consider them to be a rare and special delicacy.

Systematics
The genus Xixuthrus is currently dividend in two subgenera: Xixuthrus s. str. and Daemonarthra Lameere, 1903.

The latter differs from the former in the apically acute (rather than rounded) lobes of the third tarsal segment.

Subgenus Xixuthrus Thomson, 1864
 * Xixuthrus arfakianus (Lansberge, 1884)
 * Xixuthrus axis Thomson, 1877
 * Xixuthrus bufo Thomson, 1878
 * Xixuthrus costatus (Montrouzier, 1855)
 * Xixuthrus domingoensis Fisher 1932
 * Xixuthrus fominykhi Titarenko & Zubov 2018
 * Xixuthrus ganglbaueri Lameere, 1912
 * Xixuthrus granulipennis Komiya, 2000
 * Xixuthrus gressitti Marazzi, Marazzi & Komiya, 2006
 * Xixuthrus heros (Gräffe, 1868)
 * Xixuthrus jakli Titarenko & Zubov 2018
 * Xixuthrus lameerei Marazzi, Marazzi & Komiya, 2006
 * Xixuthrus lansbergei (Lameere, 1912)
 * Xixuthrus lunicollis Lansberge 1884
 * Xixuthrus microcerus (White, 1853)
 * Xixuthrus nycticorax Thomson, 1878
 * Xixuthrus penrousi Titarenko & Zubov, 2018
 * Xixuthrus pinkeri Titarenko & Zubov, 2018
 * Xixuthrus sapolsky Titarenko & Zubov, 2018
 * Xixuthrus solomonensis Marazzi & Marazzi, 2006
 * Xixuthrus stumpei Titarenko & Zubov, 2018
 * Xixuthrus terribilis Thomson, 1877
 * Xixuthrus thomsoni Marazzi, Marazzi & Komiya, 2006

Subgenus Daemonarthra Lameere, 1903
 * Xixuthrus helleri (Lameere, 1903)