HomeFish encyclopediaRay-finned fishesCarpsMinnows or carpsGuadalupe roundnose minnow Guadalupe roundnose minnow (Dionda nigrotaeniata) Scientific name: Dionda nigrotaeniata Cope, 1880 The Guadalupe roundnose minnow (Dionda nigrotaeniata) is a freshwater fish of the family Cyprinidae. Native range: North America, U.S.A. Species factsScientific nameDionda nigrotaeniataFamilyCyprinidae (Minnows or carps)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length9.0EnvironmentFreshwater; benthopelagicClimateSubtropicalDistributionNorth America: U.S.A.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026