Williams, P.H., Altanchimeg, D., Byvaltsev , A., De Jonghe, R., Jaffar, S., Japoshvili, G., Kahono, S., Liang, H., Mei, M., Monfared, A., Nidup, T., Raina, R., Ren, Z., Thanoosing, C., Zhao, Y. and Orr , M.C. 2020. Widespread polytypic species or complexes of local species? Revising bumblebees of the subgenus Melanobombus world-wide (Hymenoptera, Apidae, Bombus). European Journal of Taxonomy. 719, 1 (Oct. 2020), 1–120. DOI:https://doi.org/10.5852/ejt.2020.719.1107.