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Arce-Pérez, R. and Reynoso-Velasco, D. 2021. Two new species of Macrodactylus (Coleoptera: Scarabaeidae: Melolonthinae: Macrodactylini) from Mexico and Guatemala. Zootaxa. 4903, 4 (Jan. 2021), 493–500. DOI:https://doi.org/10.11646/zootaxa.4903.4.2.