The first representatives of tarsocheylid mites (Acari, Heterostigmata) from Thailand, Hoplocheylus longisetosus sp. nov. and Hoplocheylus nudis sp. nov., collected from sandy soil of the coastal grassland area, are described and illustrated. Hoplocheylus longisetosus sp. nov. differs from its congeners in having long dorsal opisthosomal setae, and the capitate solenidion ϕ1 on tibia I. Hoplocheylus nudis sp. nov. is an unusual tarsocheylid species in having a peritreme-like structure on the anterior prodorsum, and lacking most opisthosomal tergites typical for Heterostigmata.
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