Rod Iodotropheus
- Iodotropheus declivitas Stauffer, 1994
- Iodotropheus sprengerae Oliver & Loiselle, 1972
- Iodotropheus stuartgranti Konings, 1990
Actinopterygii > Perciformes > Cichlidae
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Iodotropheus sprengerae
Rod Ioichthys
- Ioichthys kashkini Parin, 2004
Actinopterygii > Osmeriformes > Opisthoproctidae
Rod Iotabrycon
- Iotabrycon praecox Roberts, 1973
Rod Iotichthys Jordan & Evermann, 1896
- Iotichthys phlegethontis (Cope, 1874)
Pisces → Actinopterygii → Cypriniformes → Cyprinidae
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Iotichthys phlegethontis