Taxonomic review of the millipede genus Touranella Attems, 1937, with a redescription of the type species, T.gracilis Attems, 1937, and descriptions of three new species from Laos (Diplopoda, Polydesmida, Paradoxosomatidae)

The flat-back millipede genus Touranella Attems, 1937 is currently comprised of 13 species, including three new ones from Laos: T.chenla Likhitrakarn, sp. nov., T.srisonchaii Likhitrakarn, sp. nov., and T.jaegeri Likhitrakarn, sp. nov. The generic diagnosis is updated, a key is given to all known species, and their distributions are mapped. Additionally, T.gracilis, the type species of Touranella from Vietnam, has been redescribed and illustrated based on type specimens.