Reference
Christian Schmid-Egger, Wolf-Harald Liebig (2021): The Convolvulus related bee species Plesiopanurgus cinerarius Cameron, 1907, Systropha iranica Popov, 1967 and S. villosa Ebmer, 1978 in southern Iran (Apiformes: Andrenidae and Halictidae) – Ampulex - Zeitschrift für aculeate Hymenopteren – 12: 32 - 36.