| Scientific Name | TSN | Taxon Author | Common Name | Name Source | Usage | Reason (ITIS) | Taxon Rank |
|---|
| Bycanistes brevis | 707796 | Friedmann, 1929 | Silvery-cheeked Hornbill | ITIS | valid | | Species |
| Bycanistes bucinator | 707793 | (Temminck, 1824) | Trumpeter Hornbill | ITIS | valid | | Species |
| Bycanistes cylindricus | 707794 | (Temminck, 1831) | Brown-cheeked Hornbill | ITIS | valid | | Species |
| Bycanistes fistulator | 707792 | (Cassin, 1850) | Piping Hornbill | ITIS | valid | | Species |
| Bycanistes subcylindricus | 707795 | (P. L. Sclater, 1871) | Grey-cheeked Hornbill Black-and-white-casqued Hornbill | ITIS | valid | | Species |
| Ceratogymna brevis | 554461 | (Friedmann, 1929) | | ITIS | invalid | subsequent name/combination of Bycanistes brevis | Species |
| Ceratogymna bucinator | 554459 | (Temminck, 1824) | | ITIS | invalid | subsequent name/combination of Bycanistes bucinator | Species |
| Ceratogymna cylindricus | 554463 | (Temminck, 1831) | | ITIS | invalid | subsequent name/combination of Bycanistes cylindricus | Species |
| Ceratogymna fistulator | 554460 | (Cassin, 1850) | | ITIS | invalid | subsequent name/combination of Bycanistes fistulator | Species |
| Ceratogymna subcylindricus | 554462 | (P. L. Sclater, 1871) | | ITIS | invalid | subsequent name/combination of Bycanistes subcylindricus | Species |
