Anterior ventral glands are present in male cloacae. Posterior ventral glands are absent from male cloacae. Kingsbury's glands are absent from male cloacae. Dorsal pelvic glands are absent in males. Lateral pelvic glands are absent in males.
Glands secreting into the male cloacal orifice are absent.
Parental care of eggs is by males. The salamander families Cryptobranchidae and Hynobiidae together form the suborder Cryptobranchoidea. The genus Andrias was formerly known as Megalobatrachus, and references to the former name are still common. The relationships shown for extant cryptobranchids follow biogeography and generic boundaries. Molecular phylogenetic studies including all extant cryptobranchid species have not been performed, however, so this grouping is somewhat tentative.