| Scientific Name | TSN | Taxon Author | Common Name | Name Source | Usage | Reason (ITIS) | Taxon Rank |
|---|
| Simpsonichthys adornatus | 647679 | Costa, 2000 | | ITIS | valid | | Species |
| Simpsonichthys alternatus | 647680 | (Costa and Brasil, 1994) | | ITIS | valid | | Species |
| Simpsonichthys antenori | 647681 | (Tulipano, 1973) | | ITIS | valid | | Species |
| Simpsonichthys auratus | 647682 | Costa and Nielsen, 2000 | | ITIS | valid | | Species |
| Simpsonichthys boitonei | 647683 | Carvalho, 1959 | | ITIS | valid | | Species |
| Simpsonichthys bokermanni | 647684 | (Carvalho and Da Cruz, 1987) | | ITIS | valid | | Species |
| Simpsonichthys brunoi | 647685 | Costa, 2003 | | ITIS | valid | | Species |
| Simpsonichthys chacoensis | 647686 | (Amato, 1986) | | ITIS | valid | | Species |
| Simpsonichthys cholopteryx | 647687 | Costa, Moreira and Lima, 2003 | | ITIS | valid | | Species |
| Simpsonichthys constanciae | 647688 | (Myers, 1942) | | ITIS | valid | | Species |
| Simpsonichthys costai | 647689 | (Lazara, 1991) | | ITIS | valid | | Species |
| Simpsonichthys delucai | 647690 | Costa, 2003 | | ITIS | valid | | Species |
| Simpsonichthys filamentosus | 647691 | Costa, Barrera and Sarmiento, 1997 | | ITIS | valid | | Species |
| Simpsonichthys flagellatus | 647692 | Costa, 2003 | | ITIS | valid | | Species |
| Simpsonichthys flammeus | 647693 | (Costa, 1989) | | ITIS | valid | | Species |
| Simpsonichthys flavicaudatus | 647694 | (Costa and Brasil, 1990) | | ITIS | valid | | Species |
| Simpsonichthys fulminantis | 647695 | (Costa and Brasil, 1993) | | ITIS | valid | | Species |
| Simpsonichthys ghisolfii | 647696 | Costa, Cyrino and Nielsen, 1996 | | ITIS | valid | | Species |
| Simpsonichthys hellneri | 647697 | (Berkenkamp, 1993) | | ITIS | valid | | Species |
| Simpsonichthys ibicuiensis | 647698 | Costa and Hellner, 1999 | | ITIS | valid | | Species |
| Simpsonichthys igneus | 647699 | Costa, 2000 | | ITIS | valid | | Species |
| Simpsonichthys izecksohni | 647700 | (Cruz, 1983) | | ITIS | valid | | Species |
| Simpsonichthys magnificus | 647701 | (Costa and Brasil, 1991) | | ITIS | valid | | Species |
| Simpsonichthys marginatus | 647702 | Costa and Brasil, 1996 | | ITIS | valid | | Species |
| Simpsonichthys multiradiatus | 647703 | (Costa and Brasil, 1994) | | ITIS | valid | | Species |
| Simpsonichthys myersi | 647704 | (Carvalho, 1971) | | ITIS | valid | | Species |
| Simpsonichthys notatus | 647705 | (Costa, Lacerda and Brasil, 1990) | | ITIS | valid | | Species |
| Simpsonichthys ocellatus | 647706 | Costa, Nielsen and de Luca, 2001 | | ITIS | valid | | Species |
| Simpsonichthys parallelus | 647707 | Costa, 2000 | | ITIS | valid | | Species |
| Simpsonichthys perpendicularis | 647708 | Costa, Nielsen and de Luca, 2001 | | ITIS | valid | | Species |
| Simpsonichthys picturatus | 647709 | Costa, 2000 | | ITIS | valid | | Species |
| Simpsonichthys reticulatus | 647710 | Costa and Nielsen, 2003 | | ITIS | valid | | Species |
| Simpsonichthys rosaceus | 647711 | Costa, Nielsen and de Luca, 2001 | | ITIS | valid | | Species |
| Simpsonichthys rufus | 647712 | Costa, Nielsen and de Luca, 2001 | | ITIS | valid | | Species |
| Simpsonichthys santanae | 647713 | (Shibata and Garavello, 1992) | | ITIS | valid | | Species |
| Simpsonichthys similis | 647714 | Costa and Hellner, 1999 | | ITIS | valid | | Species |
| Simpsonichthys stellatus | 647715 | (Costa and Brasil, 1994) | | ITIS | valid | | Species |
| Simpsonichthys suzarti | 647716 | Costa, 2004 | | ITIS | valid | | Species |
| Simpsonichthys trilineatus | 647717 | (Costa and Brasil, 1994) | | ITIS | valid | | Species |
| Simpsonichthys zonatus | 647718 | (Costa and Brasil, 1990) | | ITIS | valid | | Species |
