Araguaia Tetra

materials_examined

Paratype: 1 lot, 1 specimen — NUP 12743, 1, 52.1 mm SL: Brazil, Mato Grosso, Cocalinho, lago Varal, rio Araguaia basin, 13 ° 00 ’ 52 ” S, 50 ° 36 ’ 8 ” W, Nupélia staff, 3 Nov 2011.

Catalog of type specimens of the fish collection of the Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (NUP), Universidade Estadual de Maringá Paraná, Brazil

description

Description. A detailed description of Tetragonopterus araguaiensis was recently provided by Silva et al. (2013).

Revision of the South American genus Tetragonopterus Cuvier, 1816 (Teleostei: Characidae) with description of four new species

diagnosis

Diagnosis. Tetragonopterus araguaiensis is distinguished from all congeners except T. anostomus by having 18 – 20 gill rakers on the lower limb and 10 – 12 gill rakers in the upper limb of the first gill arch (vs. 12 – 14 and 8 – 10). Tetragonopterus araguaiensis differs from T. anostomus by having a terminal mouth (vs. subsuperior mouth) and by having two conspicuous humeral marks (vs. only one conspicuous humeral mark). It differs from T. anostomus, T. kuluene, T. juruena and T. denticulatus by the presence of 4 principal dentary teeth (vs. 5 – 6) and also by having larger and more robust teeth (vs. thinner and sharper teeth). Tetragonopterus araguaiensis differs from T. argenteus by having 7 – 9 predorsal scales (vs. 11 – 17); it differs from T. carvalhoi by having a rounded mark on caudal peduncle (vs. a lozenge-shaped mark); it differs from T. ommatus by having 0 – 2 teeth on the maxilla (vs. 7 – 8 teeth) and by having a centered mark on the caudal peduncle (vs. mark limited to the posterior portion of the caudal peduncle). Tetragonopterus araguaiensis differs from T. rarus and T. georgiae by the presence of 3.5 scale rows between lateral line and pelvic-fin origin (vs. 4.5 –

Revision of the South American genus Tetragonopterus Cuvier, 1816 (Teleostei: Characidae) with description of four new species

distribution

Distribution. Tetragonopterus araguaiensis is only known from the middle portion of the Rio Araguaia (Fig. 2 b).

Revision of the South American genus Tetragonopterus Cuvier, 1816 (Teleostei: Characidae) with description of four new species