Melalgus Dejean, 1835: 309 Apate femoralis Fabricius, 1792 Exopioides Guérin-Méneville, 1844: 187 Exopioides carinatus Guérin-Méneville, 1844 Dejean, 1837: 334 Heterarthron Guérin-Méneville, 1844: 186 Bostrichus femoralis Fabricius, 1792 Castelnau, 1836: 30 Polycaon chilensis Castelnau, 1836 LeConte, 1853: 233 Alloeocnemis stoutii LeConte, 1853 Curtis, 1839: 203 Exops bevani Curtis, 1839 Catalogue of the world genera and subgenera of the superfamilies Derodontoidea and Bostrichoidea (Coleoptera: Derodontiformia, Bostrichiformia) Zahradník, Petr Háva, Jiří Zootaxa 2014 3754 4 301 352 K6T [151,539,1910,1936] Insecta Bostrichidae Animalia Coleoptera 11 312 Arthropoda subFamily Polycaoninae    MelalgusDejean, 1835: 309. Typespecies  Apate femoralis Fabricius, 1792(I, N, Nt).    Exopioides Guérin-Méneville, 1844: 187. Typespecies  Exopioides carinatus Guérin-Méneville, 1844.  Heterarthron  Dejean, 1837: 334. Name unavailable.   Heterarthron Guérin-Méneville, 1844: 186. Typespecies  Bostrichus femoralis Fabricius, 1792.    Polycaon  Castelnau, 1836: 30. Typespecies  Polycaon chilensis Castelnau, 1836(N, Nt, P). Alloeocnemis  LeConte, 1853: 233. Typespecies  Alloeocnemis stoutii LeConte, 1853.  Exops  Curtis, 1839: 203. Typespecies  Exops bevani Curtis, 1839.