Ichthyofauna from three streams of the lower Iguatemi River in the upper Paraná river basin, Brazil Author Batista-Silva, Valéria Flávia Author Frota, Augusto Author Kashiwaqui, Elaine Antoniassi Luiz Author Abelha, Milza Celi Fedatto Author Bailly, Dayani Author Gubiani, Éder André Author Júnio da Graça, Weferson text Check List 2018 2018-03-23 14 2 363 378 http://dx.doi.org/10.15560/14.2.363 journal article 10.15560/14.2.363 1809-127X Piabarchus stramineus Eigenmann, 1908 Bryconamericus stramineus Eigenmann 1908: 105 [original description]— Castro et al. 2004: 32 , fig. 4a–8; Graça and Pavanelli 2007: 60 , 62; Hoffmann et al. 2015: 4 , fig.A2.A. Piabarchus stramineus — Thomaz et al. 2015: 20 , fig. 10; Bifi et al. 2017: 4 , 5, fig. 2.10. Material examined. Table 2 ; Figure 5F . Elongated body; terminal mouth; inner row of premaxilla with 4 teeth, outer row with 5 teeth; dentary with 9 or 10 teeth, and maxilla with 2 teeth. Lateral line with 36–38 pored scales; transversal series above lateral line with 4 rows and below with 3. Dorsal fin with 11 or 12, pecto- ral fin with 14 or 15, pelvic fin 9, anal fin with 20–22, and caudal with 19, total rays. Ground color silvery to yellowish; silvery longitudinal band (dark in preserved specimens), from humeral spot to caudal peduncle; black oval, vertically elongated, humeral spot. Caudal fin yel- lowish to orange; remaining fins hyaline, with dusky border P. stramineus is very similar to Bryconamericus exodon Eigenmann, 1907 , except for its caudal-fin margin that is hyaline versus dark margin in the latter. Piabarchus was described by presenting a long anal fin and its origin opposite to/or slightly in front of the dorsalfin origin. Recently, Thomaz et al. (2015) described the molecular phylogeny of the Stevardiinae and allocated Bryconamericus stramineus in Piabarchus . Therefore, P. stramineus can be distinguished from P. analis ( Eigenmann, 1914 ) and from P. torrenticola Mahnert & Géry, 1988 by the origin of its anal fin being behind the dorsalfin origin.