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(A) lectotype of Copeina callolepis, BMNH 1909.4.2.27, male, 31.9 mm SL, Amazon, (B) holotype of Nannostomus stigmasemion, ANSP 39188, immature, 10.8 mm SL, tributary of the rio Madeira near Porto Velho, Brazil, flipped horizontally (photo by K. Luckenbill & M. Sabaj-Perez), (C) drawing of holotype of Nannostomus stigmasemion (Fowler, 1913: fig 4), (D) largest syntype of Pyrrhulina nigrofasciata ZMH 1211, male, 35.8 mm SL, upper rio Amazonas.
