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 Anthidiellum (Loyolanthidium) ehrhorni (Cockerell, 1900) [ USNM ; ♂ Mojave Desert , California , USA ] Anthidiellum ehrhorni is found in the southwestern USA and northwestern Mexico . This species has been previously reported in the Coastal Sage Matorral , Lower Colorado Desert , Gulf Coast , and Sarcocaulescent Shrubland with preserved specimen records from BBSL and ASUHIC ( GBIF 2023 ). We reviewed specimens from the Lower Colorado Desert ( 2 ♂ ) , and Coastal Sage Matorral ( 2 ♂ ) vouchered in BBSL and CASC . Additionally , the BBPT collected this species in the Coastal Sage Matorral in June 2020 ( 4 ♂ , 1 ♀ ) , April ( 1 ♂ ), and May 2022 ( 1 ♂ ); Chaparral in May 2022 ( 1 ♂ ); and Lower Colorado Desert in May 2022 ( 1 ♀ ) . Voucher specimens are in MABC , and ECOAB . See fig. 194 .