Tetragonopterus araguaiensis Silva, Melo, Oliveira & Benine 2013

This species is distinguished from its congeners except Tetragonopterus anostomus by the number of gill rakers on the upper and lower limbs of the first gill arch, 10-12 and 18-20, respectively (vs. 8-10 and 12-14); differs from T. anostomus by the terminal mouth (vs. subsuperior); differs from T. anostomus, T. kuluene, T. juruena, T. denticulatus in the number of principal teeth in the dentary 4 (vs. 5-6) and also by having larger and more robust teeth (vs. thinner and sharper teeth); differs from T. argenteus by the number of predorsal scales 7-9 (vs. 111-17); differs from T. carvalhoi by having a spot on the caudal peduncle that is round (vs. lozenge-shaped spot); differs from T. ommatus by the teeth on the maxilla 0-2 (vs. 7-8) and having a centered mark on the caudal peduncle (vs. limited to the posterior portion of the caudal peduncle); differs from T. rarus, T. georgiae by the scale rows between lateral line and pelvic-fin origin 3.5 (vs. 4.5-5.5); differs from T. rarus by the lack of dark stripes on the lateral surface of the body (vs. the presence of such stripes) (Ref. 124043).Description: Dorsal-fin rays ii,9; anal-fin rays v, 32-35; pectoral fin with i,12-14; pelvic-fin rays i, 7; scales in longitudinal series 30-33; and scale rows between lateral line and pelvic-fin origin 3·5 (Ref. 93280).

Dorsal soft rays (total): 9; Analsoft rays: 37 - 40

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Tetragonopterus araguaiensis Tetragonopterus generoko animalia da. Arrainen barruko Actinopterygii klasean sailkatzen da, Characidae familian.

阿瓜亞河大眼脂鯉，為輻鰭魚綱脂鯉目脂鯉亞目脂鯉科的其中一個種，分布於南美洲巴西阿瓜亞河流域，體長可達6.3公分，棲息在底中層水域，生活習性不明。