Clades:
Bucerotiformes;
Afroaves;
Aves;
Sauropsida;
Animals;
Kingdoms.
Members: x Aceros nipalensis; x Anorrhinus austeni; x Anthracoceros albirostris; x Berenicornis comatus; x Buceros bicornis; x Bycanistes albotibialis; x Ceratogymna atrata; x Horizocerus albocristatus; x Lophoceros alboterminatus; x Ocyceros birostris; x Penelopides affinis; x Rhabdotorrhinus corrugatus; x Rhyticeros cassidix; x Tockus damarensis.