Figure 42. Paracanthopoma vampyra, n in A taxonomic review of the vampire catfish genus Paracanthopoma Giltay, 1935 (Siluriformes, Trichomycteridae), with descriptions of nine new species and a revised diagnosis of the genus

Figure 42. Paracanthopoma vampyra, n. sp., holotype, MZUSP 86953, 14.6 mm SL. Brazil, Amazonas, Rio Preto da Eva, Igarapé Sucuriju. (A) Lateral view of body; (B) Dorsal view of head; (C) ventral view of head. flattened. Eye large (Fig. 42), without free orbital rim, lo- specimens examined. Anterior nostril small, surround- cated dorsolaterally on head and directed dorsolaterally, ed by short tubule of integument produced posteriorly with pronounced lateral component. Integument over into small pointed process, with double elastin cores. eye thin and transparent. Middle of eye slightly anterior Anterior internarial width slightly larger than interorbital. to middle of HL, interorbital width approximately 70% of Posterior naris slightly larger than anterior one, round- longitudinal diameter of eye. Eyelens large, constricted ish or triangular in shape, adjacent to mesial margin of by iris only marginally, with large round or oval pupil, in eye and partly occluded by anterior flap of integument. Anterior margin of posterior naris posterior to transverse Table 13. Morphometric data of Paracanthopoma vampyra. Ranges, mean line through anterior margin of eyes. Posterior internarial and SD include holotype. Head subunits were obtained with an ocular mi- width narrower than interorbital and slightly larger than crometer and therefore as projections. Abbreviations: min = minimum diameter of one nostril. value; max = maximum value; n = number of specimens; SD = standard Opercular odontodophore medium-sized and elon- deviation. gate, dorsolaterally located on head, on dorsal half of head depth in lateral view, anterodorsally to pectoral-fin