Casciotta, Almirón, Piálek, Gómez & Rícan, 2010
Crenicichla ypo (Teleostei: Cichlidae), a new species from the middle Paraná basin in Misiones, ArgentinaA new species of Crenicichla, C. ypo, is described from the Arroyo Urugua-í, a left-hand tributary of the middle Paraná River, Misiones province, Argentina. The new species is recognized by 6 to 8 irregular blotches along the upper lateral line, absence of scattered dark spots on flanks, low number (47-55) of E1 scales, and a slightly prognathous lower jaw. Females have a distinctive coloration of the dorsal fin, with a wide black longitudinal stripe on the distal portion with an equally wide red stripe below it.
Jorge Casciotta, Adriana Almirón, Lubomír Piálek, Sergio Gómez and Oldrich Rícan
Neotropical Ichthyology, 8(3):643-648, 2010