First member of the New World genus Diceroderes from early Miocene Mexican amber (Coleoptera: Tenebrionidae: Tenebrioninae: Toxicini)

A new fossil species belonging to the extant Central American genus Diceroderes Solier, 1841 (Tenebrionidae: Tenebrioninae: Toxicini) is described based on an exquisitely preserved male specimen from early Miocene Mexican (Chiapas) amber (~23-16 Ma). High-resolution X-ray microtomography was used to document fine anatomical detail of soft tissues, including well-preserved male genitalia. Diceroderes jiangkuni sp. nov. can be most readily differentiated from congenerics by the clypeus with a transverse row of tubercles, apices of pronotal horns strongly angled upwards in the male, elytra rounded in lateral view, and all male tibiae lacking apical spines. This represents the first fossil record of Toxicini from Mexican amber and indicates that the genus persisted in the region since the early Miocene.