karstenii, Hypostomus Lütken [C. F.] (ex Krøyer) 1874:204 [3] [Videnskabelige Meddelelser fra den Naturhistoriske Forening i Kjøbenhavn, Aaret 1873 (nos 13-14); ref. 2854] On p. 3 of separate. Not available, name in the synonymy of Chaetostomus gymnorhynchus (Kner 1854) -- (Isbrücker 1980:69 [ref. 2303]). •Treated as synonym of Ancistrus gymnorhynchus Kner 1854 -- (Isbrücker 2001:28 [ref. 25653]). •In the synonymy of Ancistrus gymnorhynchus Kner 1854 -- (Isbrücker 2002:19 [ref. 27178], Fisch-Muller in Reis et al. 2003:376 [ref. 27061], Taphorn et al. 2010:21 [ref. 30697]). Nomen Nudum. Current status: Synonym of Ancistrus gymnorhynchus Kner 1854. Loricariidae: Hypostominae.