Original description as Crenicichla ypo:
- Casciotta, Jorge & A. Almirón, L. Piálek, S. Gómez, O. Rícan. 2010. "Crenicichla ypo (Teleostei: Cichlidae), a new species from the middle Paraná basin in Misiones, Argentina". Neotropical Ichthyology. 8(3):.p.643-648. (crc02689) (abstract)
Conservation: Crenicichla ypo is evaluated by the international union for the conservation of nature in the iucn red list of threatened species as (EN) endangered (2022). Crenicichla ypo is only known from Urugua-í stream basin, an affluent of the Paraná River in Misiones province. Some of the distribution is within protected areas, but part of the basin is altered by a dam and an artificial lake, with the presence of invasive exotic fish species, and forestation with exotic pines. There are five locations based on these threats, and an inferred continuing decline in habitat (Liotta, 2022).