Abstract
A new Trox species, T. jeanae Scholtz and Inward, is described from Thailand. The new species belongs to the Trox opacotuberculatus species-group, a mainly eastern Palaearctic group consisting of 12 species. Habitus drawings of the T. jeanae adult and male genitalia are provided. All members of the species-group are re-examined, a map of species distribution and a tabulated key to the group is provided, and their male genitalia illustrated. The biogeography of the trogid genera Trox and Omorgus is discussed and contrasted. We suggest that T. jeanae sp. nov. is a relict species, persisting in a tropical region where it is now quite isolated from most other members of the predominantly Palaearctic T. opacotuberculatus species-group.
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