Saini, V. .; Dey, D. .

Description of Rhopalum (s. str.) gulmargense N. Sp. With a Key to the Indian Species of the Subgenus Rhopalum Stephens, 1829 S. Str. (Hymenoptera: Crabronidae: Crabronini)

. Zootaxa 2022, 5105, 139-144.