Description of a new species of Lathrobium Gravenhorst, 1802 (Staphylinidae: Paederinae) from Vietnam based on integrative taxonomy

The second species of the genus Lathrobium Gravenhorst, 1802 (Staphylinidae: Paederinae) from Vietnam, Lathrobium sapaensis Tokareva & Bekchiev sp. nov., is described. The COI fragments for five Lathrobium species from China and Vietnam are published for the first time. The distances between COI sequences of the new species, seven known Lathrobium species, and one species from a close genus are estimated.

The new species is clearly distinct from all congeners examined, both morphologically and genetically. The COI sequence of L. sapaensis Tokareva & Bekchiev sp. nov. differs by 16–22% from those of related species, indicating a high level of genetic divergence. This finding extends the known distribution of Lathrobium in Southeast Asia and provides a valuable molecular reference for future studies of the genus.