Revealing the Baja California Peninsula’s Hidden Treasures: An Annotated checklist of the native bees (Hymenoptera: Apoidea: Anthophila) Author Pedro, Diego De Author Ceccarelli, Fadia Sara Author Sagot, Philippe Author López-Reyes, Eulogio Author Mullins, Jessica L. Author Mérida-Rivas, Jorge A. Author Falcon-Brindis, Armando Author Griswold, Terry Author Ascher, John S. Author Gardner, Joel Author Ayala, Ricardo Author Vides-Borrell, Eric Author Vandame, Rémy text Zootaxa 2024 2024-10-11 5522 1 1 391 http://dx.doi.org/10.11646/zootaxa.5522.1.1 journal article 10.11646/zootaxa.5522.1.1 1175-5334 13920532 2640192E-0A2B-49C9-BB35-D43AF0263E51 Calliopsis (Nomadopsis) helianthi (Swenk & Cockerell, 1907) [ Holotype : UNSM ; Warbonnet Canon , Sioux County , Nebraska , July 12, 1901 ] Calliopsis helianthi specializes on pollen from plants in the family Euphorbiaceae ( Fowler 2020 ) . This species was documented in both BC and BCS by Ayala et al. (1996) . Additionally, we examined six females collected in the Central Desert (BC) and Gulf Coast (BCS) in September and October 1941 (CASC), and one female collected in the Central Desert (BC) in March 2014 (CNIN). See fig. 28.