A new species of Nemuroglanis (Siluriformes: Heptapteridae) from the rio Guariba, rio Madeira basin, Brazil Author Ribeiro, Frank Raynner V. Author Pedroza, Wellington S. Author Rapp, Lúcia H. text Zootaxa 2011 2799 41 48 journal article 10.5281/zenodo.203225 64f88d77-3681-4eda-b3ab-0fc5e3b4c0c8 1175-5326 203225 Key to the species of Nemuroglanis 1a. Caudal fin forked; ventral caudal-fin lobe with five or six branched rays.......................................... 2 1b. Caudal fin lanceolate; ventral caudal-fin lobe with three or four branched rays..................................... 3 2a. Lateral line reaching middle portion of the adipose-fin base, with 18 to 33 sensory pores; seven, rarely six, pectoral-fin rays.................................................................................. N . furcatus , new species 2b. Lateral line reaching slightly beyond dorsal-fin base origin, with 10 to 15 sensory pores; six, rarely seven, pectoral-fin rays............................................................................................... N . mariae 3a. Ten or eleven anal-fin rays................................................................. N . pauciradiatus 3b. Thirteen to fifteen anal-fin rays................................................................ N . lanceolatus