First records of Andrena (Conandrena) cheyennorum Viereck & Cockerell, 1914 (Hymenoptera: Andrenidae) from Oregon, USA, with notes on subgeneric morphology and identification

Andrena cheyennorum Viereck & Cockerell, 1914 is an uncommon mining bee ranging widely across the western United States. We report the first occurrence records of this species in Oregon collected by Master Melittologist community scientists for the Oregon Bee Atlas at five localities in the Blue Mountains and Northern Basin and Range ecoregions. The 15 specimens documented here expand the known distribution of Andrena cheyennorum Viereck & Cockerell, 1914 is an uncommon mining bee ranging widely across the western United States. We report the first occurrence records of this species in Oregon collected by Master Melittologist community scientists for the Oregon Bee Atlas at five localities in the Blue Mountains and Northern Basin and Range ecoregions. The 15 specimens documented here expand the known distribution of A. cheyennorum and provide evidence for its status as a floral specialist of Symphoricarpos Duhamel, 1755, commonly known as snowberries. Additionally, we clarify the diagnostic morphological features of the subgenus Conandrena Viereck, 1924 and provide habitus photos to aid in the identification of A. cheyennorum.