Acestrorhynchus Eigenmann [C. H.] & Kennedy [C. H.] 1903:527 Masc. Salmo falcatus Bloch 1794. Type by being a replacement name. Replacement for Xiphorhynchus Agassiz 1829, preoccupied by Xiphorhynchus Swainson 1827 in Aves; also replaces Xiphorhamphus Müller & Troschel 1845, preoccupied by Xiphorhamphus Blyth 1843 in Aves. Also appeared in Eigenmann 1903 (Dec.):146 [ref. 1218]. •Valid as Acestrorhynchus Eigenmann & Kennedy 1903 -- (Géry 1977:326 [ref. 1597], Vari 1983:5 [ref. 5419], Menezes & Géry 1983 [ref. 8307], Menezes 1992 [ref. 21389], Taphorn 1992:99 [ref. 23654], Braga 1994:24 [ref. 27878], Toledo-Piza & Menezes 1996 [ref. 22056], Lucena & Menezes 1998:274 [ref. 23776] in fam. Acestrorhynchidae, Britski et al. 1999:55 [ref. 24147], Menezes in Reis et al. 2003:231 [ref. 27061], Toledo-Piza 2007:691 [ref. 29426], Mirande 2009:6 [ref. 30267] in Characidae, Acestrorhynchinae, Mirande 2010:482 [ref. 31006], Oliveira et al. 2011:12 [ref. 31685] in Acestrorhynchidae, Sarmiento et al. 2014:35 [ref. 35004], Bertaco et al. 2016:411 [ref. 34561]). Current status: Valid as Acestrorhynchus Eigenmann & Kennedy 1903. Acestrorhynchidae: Acestrorhynchinae.