Tmethypocoelis simplex sp. nov. Holotype, male (7.7 × 4.4 mm) (MZB.Cru.5573), Towale River, Central Banawa District, Donggala, Central Sulawesi. Left cheliped A merus lower margin B merus outer surface. Carpus C outer surface D inner surface E upper surface F lower surface. Chela G upper margin H lower margin. Merus I upper surface J lower surface K upper margin L outer margin. Chela M inner surface N outer surface O dactylus upper margin.