In the present paper Candonopsis murchisoni n. sp., C. dani n. sp., C. williami n. sp., C. kimberleyi n. sp., and C. westaustraliensisn. sp., are described, while C. tenuis (Brady, 1886) is redescribed. All species have been collected in the subterraneanwaters of Western Australia. The new species are easily distinguishable from the existing world species in details of the carapace,walking leg, cleaning leg, furca and hemipenis. Because of new features found, revised diagnosis and a key to the worldspecies are provided. Some species, previously described in the genus Candonopsis Vavra, 1891, are considered as incertaesedis, while others are removed from this genus, which now contains 25 species. Finally, the authors propose the elevation ofthe subgenera Caribecandona Broodbakker, 1983 and Cubacandona Broodbakker, 1983 to the generic level.