FIGURE 2. Curculionichthys tukana, LBP 22288, 27.8 in Two new species of Curculionichthys (Siluriformes: Loricariidae) from the rio Amazonas basin, Brazil

FIGURE 2. Curculionichthys tukana, LBP 22288, 27.8 mm SL. A) Ventral view of abdominal plates; B) Spinelet shape. Cranial bones and dermal plates of the head in C) dorsal and D) dorsolateral views. Abbreviations are: cpt = compound pterotic; f = frontal; io1–4 = infraorbitals; pr1–4 postrostral plates; n = nasal; op = opercle; pf = prefrontal; pop = preopercle; pn = prenasal; r = rostral plate; cp1–2 = subocular cheek plate; sp = sphenotic; soc = parieto-supraoccipital; spop = supraopercular plate. Scale bars: 0.5 mm (B); 1 mm (A, C, D).