Abstract
Two new species of Bryconamericus are described from southern Brazil: B. patriciae, from the headwaters of rio Pelotas (rio Uruguay drainage) and rio das Antas (laguna dos Patos drainage) and B. ecai from lower rio Taquari drainage. Bryconamericus patriciae differs from other Bryconamericus species from southern South America, by the following combination of characters: body depth (25.5-30.3% SL); head length (25.2-27.6% SL); pelvic-fin length (11.0-14.4% SL); branched anal-fin rays 14-18; teeth of outer row of premaxilla regularly implanted; teeth of inner row of premaxilla pentacuspid; teeth compressed distally; and males with bony hooks on pelvic and anal fins. Bryconamericus ecai differs from other Bryconamericus species from southern South America by the following combination of characters: body depth (33.1-36.9% SL); eye diameter (31.1-33.9% HL); snout length (26.8-32.4% HL); branched anal-fin rays 15-18; teeth of outer row of premaxilla regularly implanted; teeth of inner row of premaxilla tricuspid or pentacuspid; teeth compressed distally; and males with bony hooks on pelvic and anal fins.
Highlights
Protogino, Filiberto & López, B. microcephalus (MirandaRibeiro), B. ornaticeps Bizerril & Peres-Neto, B. pyahuBryconamericus Eigenmann (in Eigenmann, McAtee & Azpelicueta, Casciotta & Almirón, B. rubropictus (Berg), B.Ward, 1907) is a speciose characid genus, with 51 species stramineus Eigenmann, B. sylvicola Braga, B. tenuis Bizerril currently considered valid (Lima et al, 2003) inhabiting a & Araújo, B. thomasi Fowler, and B. uporas Casciota &variety of freshwater ecosystems at lower altitudes across a Azpelicueta, plus two nominal species under the synonym of broad extension of South and Central America in both sides B. iheringii: B. boops Eigenmann and B. pliodus (Cope).of the Andean cordilleras (Vari & Siebert, 1990)
Bryconamericus agna Azpelicueta & Almirón, B. eigenmanni nition was proposed by Eigenmann (1927), who included in (Evermann & Kendall), B. exodon Eigenmann, B. iheringii Bryconamericus characid species that posses the following (Boulenger), B. ikaa Casciotta, Almirón & Azpelicueta, B. combination of characters: two rows of teeth on the premaxilla lambari Malabarba & Kindel, B. menni Miquelarena, with four teeth in the inner series, a low number of teeth along
This paper aims to describe two new species of Bryconamericus from southern Brazil
Summary
Two new species of Bryconamericus are described from southern Brazil: B. patriciae, from the headwaters of rio Pelotas Bryconamericus patriciae differs from other Bryconamericus species from southern South America, by the following combination of characters: body depth (25.5-30.3% SL); head length (25.2-27.6% SL); pelvic-fin length (11.0-14.4% SL); branched anal-fin rays 14-18; teeth of outer row of premaxilla regularly implanted; teeth of inner row of premaxilla pentacuspid; teeth compressed distally; and males with bony hooks on pelvic and anal fins. Bryconamericus ecai e difere de seus congêneres que ocorrem no sul da América do Sul pela seguinte combinação de caracteres: altura do corpo (33,1-36,9% CP); diâmetro da órbita (31,1-33,9% CC); comprimento do focinho (26,8-32,4% CC); nadadeira anal com 14-18 raios ramificados; dentes da série interna do pré-maxilar tricuspidados ou. PR Key words: Ostariophysi, rio Uruguay, laguna dos Patos, Neotropical, systematics, taxonomy
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