The dubious dtella or northern dtella (Gehyra dubia) is a species of gecko in the genus Gehyra, native to Northeastern Australia (Queensland and northern New South Wales as well as islands of the Great Barrier Reef and the Torres Strait). It might also occur in the Louisiade Archipelago of Papua New Guinea. It is found in a variety of habitats, including acacia and eucalyptus woodlands, and on house walls, also in urban areas.