- With temporary gills; applied to those amphibians where gills never remain in adult life.
- With short-term gills: -- placed on those Amphibia where the gills usually do not remain in adult life.
- Having caducous branchiæ or gills; losing the gills on attaining maturity: placed on amphibians such as the newts, as distinguished from perennibranchiate amphibians.
- among Caducibranchiata. Also caducibranch.