n = 138
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Tetragonopterus abramis | Jenyns, 1842 | Astyanax abramis | Characidae | |
| Tetragonopterus aeneus | Günther, 1860 | Astyanax aeneus | Characidae | Banded tetra |
| Tetragonopterus affinis | Günther, 1864 | Bryconops affinis | Iguanodectidae | Orangefin tetra |
| Tetragonopterus akamai | Araujo & Lucinda, 2014 | Tetragonopterus anostomus | Characidae | |
| Tetragonopterus alburnus | Hensel, 1870 | Diapoma alburnum | Characidae | |
| Tetragonopterus alleni | Eigenmann & McAtee, 1907 | Ctenobrycon alleni | Characidae | |
| Tetragonopterus alosa | Günther, 1876 | Astyanax maximus | Characidae | |
| Tetragonopterus angustifrons | Regan, 1908 | Astyanax angustifrons | Characidae | |
| Tetragonopterus anostomus | Silva & Benine, 2011 | Tetragonopterus anostomus | Characidae | |
| Tetragonopterus araguaiensis | Silva, Melo, Oliveira & Benine, 2013 | Tetragonopterus araguaiensis | Characidae | |
| Tetragonopterus argenteus | Cuvier, 1816 | Tetragonopterus argenteus | Characidae | |
| Tetragonopterus bahiensis | Steindachner, 1877 | Astyanax bimaculatus | Characidae | Twospot astyanax |
| Tetragonopterus bairdii | Steindachner, 1882 | Phenacogaster pectinata | Characidae | |
| Tetragonopterus bartlettii | Günther, 1866 | Astyanax bimaculatus | Characidae | Twospot astyanax |
| Tetragonopterus belizianus | Bocourt, 1868 | Astyanax belizianus | Characidae | Belizean tetra |
| Tetragonopterus bellottii | Steindachner, 1882 | Hemigrammus bellottii | Characidae | |
| Tetragonopterus belottii | Steindachner, 1882 | Hemigrammus bellottii | Characidae | |
| Tetragonopterus brevimanus | Günther, 1864 | Astyanax brevimanus | Characidae | Quiché tetra |
| Tetragonopterus callistus | Boulenger, 1900 | Hyphessobrycon eques | Characidae | Jewel tetra |
| Tetragonopterus carvalhoi | Melo, Benine, Mariguela & Oliveira, 2011 | Tetragonopterus carvalhoi | Characidae | |
| Tetragonopterus caucanus | Steindachner, 1879 | Astyanax caucanus | Characidae | |
| Tetragonopterus caudomaculatus | Günther, 1864 | Bryconops caudomaculatus | Iguanodectidae | Tailspot tetra |
| Tetragonopterus chalceus | Spix & Agassiz, 1829 | Tetragonopterus chalceus | Characidae | |
| Tetragonopterus chrysargyreus | Günther, 1864 | Moenkhausia chrysargyrea | Characidae | |
| Tetragonopterus cobanensis | Bocourt, 1868 | Psalidodon fasciatus | Characidae | Banded astyanax |
| Tetragonopterus collettii | Steindachner, 1882 | Moenkhausia collettii | Characidae | |
| Tetragonopterus compressus | Günther, 1864 | Poptella compressa | Characidae | |
| Tetragonopterus copei | Steindachner, 1882 | Moenkhausia copei | Characidae | |
| Tetragonopterus cordovae | Günther, 1880 | Astyanax cordovae | Characidae | |
| Tetragonopterus correntinus | Holmberg, 1891 | Psalidodon correntinus | Characidae | |
| Tetragonopterus costae | Steindachner, 1907 | Moenkhausia costae | Characidae | |
| Tetragonopterus cuvieri | Lütken, 1875 | Psalidodon fasciatus | Characidae | Banded astyanax |
| Tetragonopterus daguae | (Eigenmann, 1913) | Tetragonopterus daguae | Characidae | |
| Tetragonopterus denticulatus | Silva, Melo, Oliveira & Benine, 2013 | Tetragonopterus denticulatus | Characidae | |
| Tetragonopterus diaphanus | Cope, 1878 | Bryconamericus diaphanus | Characidae | |
| Tetragonopterus dichrourus | Kner, 1858 | Moenkhausia dichroura | Characidae | Bandtail tetra |
| Tetragonopterus doceanus | Steindachner, 1877 | Moenkhausia doceana | Characidae | |
| Tetragonopterus eigenmanniorum | Cope, 1894 | Psalidodon eigenmanniorum | Characidae | |
| Tetragonopterus elegans | Steindachner, 1882 | Hemigrammus elegans | Characidae | |
| Tetragonopterus erythropterus | Holmberg, 1891 | Psalidodon erythropterus | Characidae | |
| Tetragonopterus fasciatus longirostris | Steindachner, 1907 | Deuterodon longirostris | Characidae | |
| Tetragonopterus fasslii | Steindachner, 1915 | Astyanax fasslii | Characidae | |
| Tetragonopterus festae | Boulenger, 1898 | Eretmobrycon festae | Characidae | |
| Tetragonopterus finitimus | Bocourt, 1868 | Astyanax finitimus | Characidae | Veracruz tetra |
| Tetragonopterus franciscoensis | Silva, Melo, Oliveira & Benine, 2016 | Tetragonopterus franciscoensis | Characidae | |
| Tetragonopterus fulgens | Bocourt, 1868 | Astyanax mexicanus | Characidae | Mexican tetra |
| Tetragonopterus georgiae | (Géry, 1965) | Tetragonopterus georgiae | Characidae | |
| Tetragonopterus gracilis | Lütken, 1875 | Hemigrammus gracilis | Characidae | |
| Tetragonopterus grandisquamis | Müller & Troschel, 1845 | Moenkhausia grandisquamis | Characidae | |
| Tetragonopterus gronovii | Valenciennes, 1850 | Astyanax bimaculatus | Characidae | Twospot astyanax |
| Tetragonopterus guppyi | Regan, 1906 | Hemibrycon taeniurus | Characidae | Mountain stream sardine |
| Tetragonopterus hauxwellianus | Cope, 1870 | Ctenobrycon hauxwellianus | Characidae | |
| Tetragonopterus heterorhabdus | Ulrey, 1894 | Hyphessobrycon heterorhabdus | Characidae | Flag tetra |
| Tetragonopterus huambonicus | Steindachner, 1882 | Hemibrycon huambonicus | Characidae | |
| Tetragonopterus huberi | Steindachner, 1909 | Tetragonopterus argenteus | Characidae | |
| Tetragonopterus humilis | Günther, 1864 | Psalidodon fasciatus | Characidae | Banded astyanax |
| Tetragonopterus iheringii | Boulenger, 1887 | Bryconamericus iheringii | Characidae | |
| Tetragonopterus interruptus | Jenyns, 1842 | Cheirodon interruptus | Characidae | Uruguay tetra |
| Tetragonopterus ipanquianus | Cope, 1877 | Acrobrycon ipanquianus | Characidae | |
| Tetragonopterus jacuhiensis | Cope, 1894 | Astyanax jacuhiensis | Characidae | |
| Tetragonopterus jelskii | Steindachner, 1876 | Hemibrycon jelskii | Characidae | |
| Tetragonopterus jenynsii | Steindachner, 1877 | Astyanax jenynsii | Characidae | |
| Tetragonopterus juruena | Silva, Melo, Oliveira & Benine, 2016 | Tetragonopterus juruena | Characidae | |
| Tetragonopterus kuluene | Silva, Melo, Oliveira & Benine, 2016 | Tetragonopterus kuluene | Characidae | |
| Tetragonopterus lacustris | Lütken, 1875 | Astyanax lacustris | Characidae | |
| Tetragonopterus laticeps | Cope, 1894 | Astyanax laticeps | Characidae | |
| Tetragonopterus latus | Jardine, 1841 | Myleus latus | Serrasalmidae | |
| Tetragonopterus lemniscatus | Benine, Pelição & Vari, 2004 | Tetragonopterus rarus | Characidae | |
| Tetragonopterus lepidurus | Kner, 1858 | Moenkhausia lepidura | Characidae | |
| Tetragonopterus lineatus | Perugia, 1891 | Astyanax lineatus | Characidae | |
| Tetragonopterus linnaei | Valenciennes, 1850 | Astyanax bimaculatus | Characidae | Twospot astyanax |
| Tetragonopterus longior | Cope, 1878 | Astyanax longior | Characidae | |
| Tetragonopterus longipinnis | Popta, 1901 | Poptella longipinnis | Characidae | |
| Tetragonopterus luetkenii | Boulenger, 1887 | Deuterodon luetkenii | Characidae | |
| Tetragonopterus macrophthalmus | Regan, 1908 | Psalidodon fasciatus | Characidae | Banded astyanax |
| Tetragonopterus maculatus | Müller & Troschel, 1845 | Astyanax bimaculatus | Characidae | Twospot astyanax |
| Tetragonopterus manaos | Urbanski, Melo, Silva & Benine, 2018 | Genus Species | New species | |
| Tetragonopterus maximus | Steindachner, 1876 | Astyanax maximus | Characidae | |
| Tetragonopterus mexicanus | De Filippi, 1853 | Astyanax mexicanus | Characidae | Mexican tetra |
| Tetragonopterus microphthalmus | Günther, 1864 | Psalidodon fasciatus | Characidae | Banded astyanax |
| Tetragonopterus moorii | Boulenger, 1892 | Astyanax moorii | Characidae | |
| Tetragonopterus multifasciatus | Eigenmann & Norris, 1900 | Hollandichthys multifasciatus | Characidae | |
| Tetragonopterus multiradiatus | Steindachner, 1876 | Ctenobrycon multiradiatus | Characidae | |
| Tetragonopterus nanus | Lütken, 1875 | Hasemania nana | Characidae | Silvertip tetra |
| Tetragonopterus nigripinnis | Perugia, 1891 | Markiana nigripinnis | Characidae | |
| Tetragonopterus nigripinnis geayi | Pellegrin, 1909 | Markiana geayi | Characidae | |
| Tetragonopterus nitidus | Bocourt, 1868 | Astyanax mexicanus | Characidae | Mexican tetra |
| Tetragonopterus oaxacanensis | Bocourt, 1868 | Psalidodon fasciatus | Characidae | Banded astyanax |
| Tetragonopterus obscurus | Hensel, 1870 | Astyanax obscurus | Characidae | |
| Tetragonopterus ocellifer | Steindachner, 1882 | Hemigrammus ocellifer | Characidae | Head-and-taillight tetra |
| Tetragonopterus octofasciatus | (Bloch, 1787) | Chaetodon octofasciatus | Chaetodontidae | Eightband butterflyfish |
| Tetragonopterus oerstedii | Lütken, 1875 | Astyanax orstedii | Characidae | Costa Rican tetra |
| Tetragonopterus oligolepis | Günther, 1864 | Moenkhausia oligolepis | Characidae | Glass tetra |
| Tetragonopterus ommatus | Silva, Melo, Oliveira & Benine, 2016 | Tetragonopterus ommatus | Characidae | |
| Tetragonopterus orbicularis | Valenciennes, 1850 | Brachychalcinus orbicularis | Characidae | Discus tetra |
| Tetragonopterus orbignyanus | Valenciennes, 1850 | Astyanax orbignyanus | Characidae | |
| Tetragonopterus orientalis | Cope, 1870 | Astyanax bimaculatus | Characidae | Twospot astyanax |
| Tetragonopterus orstedii | Lütken, 1875 | Astyanax orstedii | Characidae | Costa Rican tetra |
| Tetragonopterus ovalis | Günther, 1868 | Moenkhausia ovalis | Characidae | |
| Tetragonopterus panamensis | Günther, 1864 | Astyanax panamensis | Characidae | Panamanian tetra |
| Tetragonopterus pectinatus | Cope, 1870 | Phenacogaster pectinata | Characidae | |
| Tetragonopterus peruanus | Müller & Troschel, 1845 | Bryconamericus peruanus | Characidae | |
| Tetragonopterus petenensis | Günther, 1864 | Astyanax petenensis | Characidae | Petén tetra |
| Tetragonopterus phoenicopterus | Cope, 1872 | Bryconamericus phoenicopterus | Characidae | |
| Tetragonopterus pliodus | Cope, 1894 | Bryconamericus iheringii | Characidae | |
| Tetragonopterus polylepis | Günther, 1864 | Jupiaba polylepis | Characidae | |
| Tetragonopterus polyodon | Günther, 1864 | Hemibrycon polyodon | Characidae | |
| Tetragonopterus pulcher | (Gill, 1858) | Odontostilbe pulchra | Characidae | |
| Tetragonopterus rarus | (Zarske, Géry & Isbrücker, 2004) | Tetragonopterus rarus | Characidae | |
| Tetragonopterus rivularis | Lütken, 1875 | Psalidodon rivularis | Characidae | |
| Tetragonopterus rubropictus | Berg, 1901 | Bryconamericus rubropictus | Characidae | |
| Tetragonopterus rutilus | Jenyns, 1842 | Psalidodon rutilus | Characidae | |
| Tetragonopterus rutilus jequitinhonhae | Steindachner, 1877 | Psalidodon jequitinhonhae | Characidae | |
| Tetragonopterus sanctae filomenae | Steindachner, 1907 | Moenkhausia sanctaefilomenae | Characidae | Redeye tetra |
| Tetragonopterus sanctaefilomenae | Steindachner, 1907 | Moenkhausia sanctaefilomenae | Characidae | Redeye tetra |
| Tetragonopterus sawa | Castelnau, 1855 | Tetragonopterus argenteus | Characidae | |
| Tetragonopterus scabripinnis | Jenyns, 1842 | Astyanax scabripinnis | Characidae | |
| Tetragonopterus schmardae | Steindachner, 1882 | Hemigrammus schmardae | Characidae | |
| Tetragonopterus schomburgkii | Jardine, 1841 | Myloplus schomburgkii | Serrasalmidae | Disk tetra |
| Tetragonopterus scleroparius | Regan, 1908 | Bryconamericus scleroparius | Characidae | |
| Tetragonopterus signatus | Burmeister, 1861 | Tetragonopterus signatus | Characidae | |
| Tetragonopterus simus | Boulenger, 1898 | Bryconamericus simus | Characidae | |
| Tetragonopterus spilurus | Valenciennes, 1850 | Ctenobrycon spilurus | Characidae | Silver tetra |
| Tetragonopterus spilurus hauxwellianus | Cope, 1870 | Ctenobrycon hauxwellianus | Characidae | |
| Tetragonopterus steindachneri | Eigenmann, 1893 | Bario steindachneri | Characidae | |
| Tetragonopterus stilbe | Cope, 1870 | Astyanax stilbe | Characidae | |
| Tetragonopterus streetsii | Cope, 1872 | Astyanax mexicanus | Characidae | Mexican tetra |
| Tetragonopterus tabatingae | Steindachner, 1876 | Phenacogaster pectinata | Characidae | |
| Tetragonopterus taeniatus | Jenyns, 1842 | Deuterodon taeniatus | Characidae | |
| Tetragonopterus ternetzi | Boulenger, 1895 | Gymnocorymbus ternetzi | Characidae | Black tetra |
| Tetragonopterus trinitatis | Lütken, 1875 | Hemibrycon taeniurus | Characidae | Mountain stream sardine |
| Tetragonopterus ulreyi | Boulenger, 1895 | Hemigrammus ulreyi | Characidae | |
| Tetragonopterus unilineatus | (Gill, 1858) | Hemigrammus unilineatus | Characidae | Featherfin tetra |
| Tetragonopterus victoriae | Steindachner, 1907 | Knodus victoriae | Characidae | |
| Tetragonopterus viejita | Valenciennes, 1850 | Psalidodon fasciatus | Characidae | Banded astyanax |
| Tetragonopterus vittatus | Castelnau, 1855 | Astyanax bimaculatus | Characidae | Twospot astyanax |
| Tetragonopterus wappi | Valenciennes, 1850 | Astyanax bimaculatus | Characidae | Twospot astyanax |
| Tetragonopterus xinguensis | Steindachner, 1882 | Moenkhausia xinguensis | Characidae |