| Referencia principal | Silva, G.S.C., B.F. Melo, C. Oliveira and R.C. Benine, 2013 |
| El aspecto se refiere a | |
| Bones in OsteoBase |
| órganos especializados | |
| diverso aspecto | |
| diversos colores | |
| Observaciones | Adult males possess bony hooks on the distal segments of the fourth unbranched of the anal fin and on the caudal branch of the anteriormost branched rays of the anal fin. Two bony hooks per segment (Ref. 93280). |
| Características llamativas | |
| Forma lateral del cuerpo | short and / or deep |
| Sección transversal | |
| Perfil dorsal de la cabeza | |
| Tipo de ojos | |
| Tipo de boca/hocico | |
| Posición de la boca | |
| Diagnosis |
Distinguished from other congeners except Tetragonopterus anostomus by having five principal teeth in the dentary (vs. four) as well as by having relatively smaller teeth of the dentary with pointed cusps (v. robust teeth with somewhat rounded cusps). Differs from T. anostomus by having terminal position of the mouth (vs. subsuperior). Can be diagnosed from T. anostomus and T. araguaiensis by having 13-14/8-9 gill rakers on the upper and lower limbs of the first gill arch (vs.17-20/10-12); from T. argenteus by having 8 predorsal scales (vs. 12-16); from T. carvalhoi by the presence of a rounded dark spot on the caudal peduncle (vs. a lozenge-shaped dark spot on the caudal peduncle); and from T. rarus by the lack of dark longitudinal stripes on the lateral surface of the body (vs. the presence of such stripes) (Ref. 93280). Description: Dorsal-fin rays ii, 9; anal-fin rays v,28- v,32; pectoral- fin rays i,13-15; pelvic-fin rays i,7; scales in longitudinal series 32- 35; scale rows between lateral line and pelvic fin origin 3·5 (Ref. 93280). |
| Facilidad de identificación |
| Líneas laterales | interrumpido: No |
| Escalas en la línea lateral | |
| Escalas de la línea lateral con poros | |
| Escalas en las series laterales | |
| Filas de escalas sobre la línea lateral | 7 - 7 |
| Filas de escalas debajo de la línea lateral | |
| Escalas alrededor del peduncule caudal | 14 - 14 |
| Barbillas | |
| Hendiduras branquiales (solamente tiburones/rayas) | |
| Branquispinas | |
| en el miembro inferior | 12 - 14 |
| en el miembro superior | 8 - 9 |
| total | |
| Vértebra | |
| preanal | 8 - 8 |
| total |
| Cualidades | no striking attributes |
| Número de las aletas | 1 |
| número de pínnulas | Dorsal |
| Ventral | |
| total de espinas | |
| Total de rayos suaves | 11 - 11 |
| Aleta adiposa | present |
| Cualidades | forked |
| Número de las aletas | |
| total de espinas | |
| Total de rayos suaves | 33 - 37 |
| Pectoral | Cualidades more or less normal |
| espinas | |
| Rayos-suaves 14 - 16 | |
| Pélvicas | Cualidades more or less normal |
| posición abdominal before origin of D1 | |
| espinas | |
| Rayos-suaves 8 - 8 |