n = 34
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Laimosemion agilae | (Hoedeman, 1954) | Laimosemion agilae | Rivulidae | |
| Laimosemion altivelis | (Huber, 1992) | Laimosemion altivelis | Rivulidae | |
| Laimosemion amanapira | (Costa, 2004) | Laimosemion amanapira | Rivulidae | |
| Laimosemion breviceps | (Eigenmann, 1909) | Laimosemion breviceps | Rivulidae | |
| Laimosemion carolinae | (Vermeulen & Mejia-Vargas, 2020) | Genus Species | New species | |
| Laimosemion cladophorus | (Huber, 1991) | Laimosemion cladophorus | Rivulidae | |
| Laimosemion corpulentus | (Thomerson & Taphorn, 1993) | Laimosemion corpulentus | Rivulidae | |
| Laimosemion dibaphus | (Myers, 1927) | Laimosemion dibaphus | Rivulidae | |
| Laimosemion flammaecauda | (Vermeulen & Mejia-Vargas, 2020) | Genus Species | New species | |
| Laimosemion foliiscola | (Vermeulen & Mejia-Vargas, 2020) | Genus Species | New species | |
| Laimosemion frenatus | (Eigenmann, 1912) | Laimosemion frenatus | Rivulidae | |
| Laimosemion geayi | (Vaillant, 1899) | Laimosemion geayi | Rivulidae | |
| Laimosemion gili | Valdesalici & Nielsen, 2017 | Genus Species | New species | |
| Laimosemion gransabanae | (Lasso, Taphorn & Thomerson, 1992) | Laimosemion gransabanae | Rivulidae | |
| Laimosemion jauaperi | Costa & Bragança, 2013 | Genus Species | New species | |
| Laimosemion kirovskyi | (Costa, 2004) | Laimosemion kirovskyi | Rivulidae | |
| Laimosemion leticia | Valdesalici, 2016 | Laimosemion leticia | Rivulidae | |
| Laimosemion lyricauda | (Thomerson, Berkenkamp & Taphorn, 1991) | Laimosemion lyricauda | Rivulidae | |
| Laimosemion mabura | Valdesalici & Gil-Garcia, 2015 | Laimosemion mabura | Rivulidae | |
| Laimosemion mahdiaensis | (Suijker & Collier, 2006) | Laimosemion mahdiaensis | Rivulidae | |
| Laimosemion manaensis | (Hoedeman, 1961) | Laimosemion agilae | Rivulidae | |
| Laimosemion nicoi | (Thomerson & Taphorn, 1992) | Laimosemion nicoi | Rivulidae | |
| Laimosemion paryagi | Vermeulen, Suijker & Collier, 2012 | Laimosemion paryagi | Rivulidae | Paryag's killifish |
| Laimosemion rectocaudatus | (Fels & de Rham, 1981) | Laimosemion rectocaudatus | Rivulidae | |
| Laimosemion romeri | (Costa, 2003) | Laimosemion romeri | Rivulidae | |
| Laimosemion sape | (Lasso-Alcalá, Taphorn, Lasso & León-Mata, 2006) | Laimosemion sape | Rivulidae | |
| Laimosemion staecki | (Schindler & Valdesalici, 2011) | Laimosemion staecki | Rivulidae | |
| Laimosemion strigatus | (Regan, 1912) | Laimosemion strigatus | Rivulidae | |
| Laimosemion tecminae | (Thomerson, Nico & Taphorn, 1992) | Laimosemion tecminae | Rivulidae | |
| Laimosemion torrenticola | (Vermeulen & Isbrücker, 2000) | Laimosemion torrenticola | Rivulidae | |
| Laimosemion uakti | (Costa, 2004) | Laimosemion uakti | Rivulidae | |
| Laimosemion uatuman | (Costa, 2004) | Laimosemion uatuman | Rivulidae | |
| Laimosemion ubim | Costa & Lazzarotto, 2014 | Laimosemion ubim | Rivulidae | |
| Laimosemion xiphidius | (Huber, 1979) | Laimosemion xiphidius | Rivulidae |