†Protobombus Cockerell 1908
Insecta - Hymenoptera - Apidae
Alternative spelling: Electrapis (Protobombus)
Synonyms: Chalcobombus Cockerell 1908, Sophrobombus Cockerell 1908
Full reference: T. D. A. Cockerell. 1908. Descriptions and records of bees. XX. The Annals and Magazine of Natural History, Eighth Series 2:323-334
Parent taxon: Electrapini according to T. Wappler 2003
Sister taxa: Electrapis, Thaumastobombus
Subtaxa: Protobombus basilaris, Protobombus fatalis, Protobombus hirsutus, Protobombus indecisus, Protobombus messelensis, Protobombus pristinus, Protobombus tristellus