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Gymnotus aequilabiatus
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G. a. nigriceps
- Gymnotus aequilabiatus nigriceps Ihering, 1907; (valid, uncertain)
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Gymnotus anguillaris Hoedeman, 1962
- Gymnotus coropinae Hoedeman, 1962; (synonym)
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Gymnotus bahianus Campos-da-Paz & Cosota, 1996
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Gymnotus carapo Linnaeus, 1758
- Gymnotus tremulus Houttuyn, 1764; (vs)
- Gymnotus albus Pallas, 1769; (unavailable, in synonymy)
- Gymnotus fasciatus Pallas, 1769; (synonym)
- Gymnotus fasciatus Pallas, 1769; (unavailable, in passing)
- Gymnotus fasciatus Pallas, 1769; (unavailable, in synonymy)
- Gymnotus brachiurus Bloch, 1786; (synonym)
- Gymnotus macrourus Bloch, 1786; (unavailable)
- Gymnotus putaol Lacep¨de, 1800; (synonym)
- Giton fasciatus Kaup, 1856; (synonym)
- Sternopygus carapus Gìnther, 1870; (vs)
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? var. caerulescens Walbaum, 1792
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Gymnotus cataniapo Mago-Leccia, 1994
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Gymnotus coatesi Ortega & Vari, 1986
- Gymnotus coatesi La Monte, 1935; (valid as)
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Gymnotus cylindricus Bussing, 1987
- Gymnotus cylindricus La Monte, 1935; (valid as)
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?Gymnotus fierasfer Lacep¨de, 1800
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Gymnotus inaequilabiatus Mago-Leccia, 1994
- Carapus inaequilabiatus Valenciennes, 1842; (valid as)
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Gymnotus maculosus Albert & Miller, 1995
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Gymnotus pantherinus Mago-Leccia, 1994
- Giton fasciatus var. pantherinus Steindachner, 1908; (valid as)
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Gymnotus pedanopterus Mago-Leccia, 1994
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Gymnotus stenoleucus Mago-Leccia, 1994