New species of the catfish genus Trichomycterus (Siluriformes, Trichomycteridae) from the headwaters of the rio São Francisco basin, Brazil. Wolmar Benjamin Wosiacki Zootaxa 2004 592 1 12 48CZK urn:lsid:zoobank.org:act:08A7D1B8-8138-4699-8288-76A52145EA04 Myers 1927 Actinopterygii Trichomycteridae Ochmacanthus Animalia Ochmacanthus alternus Myers 1927:129 Siluriformes 11 Chordata species alternus  MZUSP 30473 (3 ex.);