(syn. Anthracoceros Ϯ Palawan Hornbill A. marchei) Gr. γυμνος gumnos bare, naked; λαιμος laimos throat; "b'. Chin and throat naked. d''. Casque large and swollen, much like that of Anthracoceros, but less compressed laterally . . . . .6. GYMNOLÆMUS ... 6. GYMNOLÆMUS. Bill large and curved. Casque as in Anthracoceros, but more compressed from above. Throat naked. Tail-feathers subequal. Crest fairly developed. Range. Palawan. 1. Gymnolæmus marchii." (Ogilvie-Grant 1892); "Gymnolæmus Ogilvie-Grant, Cat. Bds. Brit. Mus., 17, 1892, p. 348 (in key), p. 370. Type, by monotypy, Anthracoceros marchii Oustalet." (Peters 1945, V, 266).