Gymnotocinclus

Roxo, Fábio F., Silva, Gabriel S. C., Ochoa, Luz Eneida & Zawadzki, Cláudio H., 2017, Description of a new species of Gymnotocinclus from the rio Tocantins basin with phylogenetic analysis of the subfamily Hypoptopomatinae (Siluriformes: Loricariidae), Zootaxa 4268 (3), pp. 337-359 : 339

Redefinition of Gymnotocinclus

The genus Gymnotocinclus can be distinguished from all other genera of Otothyrini by the combination of two characters: (1) absence of dermal plates on snout tip, Fig. 3 ; (2) maxillary barbel adnate to the lower lip (a character also present in species of Corumbataia ).

Figures

FIGURE 3. Gymnotocinclus canoeiro, LBP 19469, paratype, 44.7 mm SL, showing the head bone plates in dorsal view. cpt = compound pterotic; f = frontal; io 1 - 5 = infraorbitals; n = nasal; op = opercle; pr 1 - 2 postrostral plates; pf = prefrontal; pn = prenasal; pop = preopercle; sp = sphenotic; CP 1 - 2 = subocular cheek plates; soc = parieto-supraoccipital; pl-supr = suprarostral plates.