amphibian family vs family Amphiumidae

Other hyponyms of amphibian family include family Salamandridae, Salamandridae, Ambystomatidae, family Ambystomatidae, Cryptobranchidae, family Cryptobranchidae, Dicamptodontidae, family Dicamptodontidae, family Plethodontidae, Plethodontidae, Amphiumidae, family Sirenidae, Sirenidae, family Ranidae, Ranidae, family Leptodactylidae, Leptodactylidae, family Polypedatidae, Polypedatidae, Ascaphidae, family Ascaphidae, family Leiopelmatidae, family Liopelmidae, Leiopelmatidae, Liopelmidae, Bufonidae, family Bufonidae, Discoglossidae, family Discoglossidae, family Pelobatidae, Pelobatidae, family Hylidae, Hylidae, Brevicipitidae, family Brevicipitidae, family Microhylidae, Microhylidae, family Pipidae, Pipidae, family Xenopodidae, Xenopodidae, Caeciliadae, Caeciliidae, family Caeciliadae, family Caeciliidae.