Xanthorhynchus

(syn. Tockus Ϯ Southern Yellow-billed Hornbill T. leucomelas) Gr. ξανθος xanthos  yellow; ῥυγχος rhunkhos  bill; "Xanthorhynchus gen. nov., type Buceros leucomelas Licht.: bill very long, conspicuously and evenly arching, normally not toothed, though sometimes slightly chipped; length of the culmen about two and a half times the height at the nostrils; casque forming a high ridge, evenly arching with the bill, from which it is marked off by a shallow groove extending to a point not far from the tip; wing and tail of about the same length; secondaries as long as the primaries." (A. Roberts 1922).

Search for more names on the Key to Scientific Names in Ornithology by James A. Jobling.
Recommended citation
Jobling, J. A. (2019). Key to Scientific Names in Ornithology. In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.) (2019). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from www.hbw.com on 23 January 2019).