Kirwan, G. M., Rice, N. H., Jørgensen, P., & Collar, N. J. (2026). Prevailing usage versus priority: a revision of the types and nomenclature of the Pionus menstruus (Linnaeus, 1766) species group (Aves: Psittacidae). Zootaxa, 5831(2), 233–244. https://doi.org/10.11646/zootaxa.5831.2.5