Piabarchus stramineus Eigenmann, 1908

Batista-Silva, Valéria Flávia, Frota, Augusto, Kashiwaqui, Elaine Antoniassi Luiz, Abelha, Milza Celi Fedatto, Bailly, Dayani, Gubiani, Éder André & Júnio da Graça, Weferson, 2018, Ichthyofauna from three streams of the lower Iguatemi River in the upper Paraná river basin, Brazil, Check List 14 (2), pp. 363-378 : 369

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.