R. Ayala, I. A. Hinojosa-Díaz, and A. G. Armas-Quiñonez, “A new species of Rhathymus Lepeletier & Serville, 1828 (Hymenoptera: Apidae: Rhathymini) from Guatemala”, Zootaxa, vol. 4700, no. 1, pp. 132–138, Nov. 2019.