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Cynopotamus amazonus Ortega & Vari, 1986
- Anacyrtus amazonum Gìnther, 1868; (valid as)
- Cynopotamus amazonum Gìnther, 1868; (valid as)
- Anacrytus limaesquamis Cope, 1878; (synonym)
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Cynopotamus anomalus G©ry, 1977
- Xiphorhamphus anomalus Steindachner, 1880; (valid as)
- Acestrocephalus anomalus Eigenmann, 1910; (valid as)
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Cynopotamus argenteus Valenciennes, 1849
- Hydrocyon argenteum Valenciennes, 1836; (valid as)
- Characinus squamosus Eigenmann & Kennedy, 1903; (synonym)
- Charax caliurus Eigenmann & Kennedy, 1907; (synonym)
- Cynopotamus argenteus Menezes, 1987
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Cynopotamus atratoensis
- Astyanax atratoensis Eigenmann, 1907; (vs)
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Cynopotamus bipunctatus Pellegrin, 1909
- Hybocharax bipunctatus G©ry & Vu-T¢n-Tuª, 1963; (valid as)
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Cynopotamus essequibensis Eigenmann, 1912
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?Cynopotamus gibbosus Valenciennes, 1850
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Cynopotamus goeldii G©ry, 1977
- Charax goeldii Fowler, 1913; (valid as)
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Cynopotamus gouldingi Menezes, 1987
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?Cynopotamus humeralis Valenciennes, 1850
- Salmo sachicanga Kner (ex Natterer), 1860; (unavailable, in passing)
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Cynopotamus juruenae Menezes, 1987
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Cynopotamus kincaidi Menezes, 1987
- Cyrtocharax kincaidi Schultz, 1950; (valid as)
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?Cynopotamus magdalenae (Steindachner, 1879)
- Anacyrtus magdalenae Steindachner, 1879
- Cynopotamus magdalenae Steindachner, 1879; (vs)
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Cynopotamus sardina G©ry, 1977
- Charax sardina Fowler, 1913; (valid as)
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Cynopotamus tocantinensis Menezes, 1987