Gelanoglanis, J.E.Bohlke, 1980

Calegari, Bárbara B., Reis, Roberto E. & Vari, Richard P., 2014, Miniature catfishes of the genus Gelanoglanis (Siluriformes: Auchenipteridae): monophyly and the description of a new species from the upper rio Tapajós basin, Brazil, Neotropical Ichthyology 12 (4), pp. 699-706 : 705

Key for the species of Gelanoglanis

1a. Dorsal and pectoral fins with spine ............................. 2

1b. Dorsal and pectoral fins lacking spine ........................ ......................................................... G. nanonocticolus

2a. Anterior fontanel absent; adult males with short gonopodium terminating at anal-fin origin; premaxillary teeth occupying two-thirds of length of premaxilla ...... 3

2b. Anterior fontanel present; adult males with long gonopodium extending posteriorly to midlength of base of anal fin; premaxillary teeth restricted to anterior portion of bone, occupying one-half or less of length of premaxilla ( Fig. 4 ) .............................................. G. pan

3a. Dorsal-fin spine with strong serrae along posterior margin ........................................................... G. stroudi

3b. Dorsal-fin spine simple, without serrae along posterior margin .......................................................... G. travieso

Figures

Fig. 4. Lateral view of the mandibular arch of Gelanoglanis pan, MZUSP 96032, paratype, 20.2 mm SL. AA = anguloarticular, D = dentary, PM = premaxilla, LC = subdivided autogenous laterosensory canal. Scale bar = 0.5 mm.