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On the validity and taxonomic status of Crypturellus obsoletus griseiventris (Salvadori, 1895) and C. o. hypochraceus (Miranda-Ribeiro, 1938) (Aves, Tinamidae)

. Zootaxa. 4951, 2 (Apr. 2021), 321–341. DOI:https://doi.org/10.11646/zootaxa.4951.2.6.