Perdita portalis Timberlake, 1954:357, ♂♀. Holotype ♂, about 1 mile east of Portal, Arizona, Aug. 12, 1940 (Citrus Experiment Station, Riverside, leg. Timberlake); Danforth, 1996Danforth, B.N. 1996. Phylogenetic analysis and taxonomic revision of the Perdita subgenera Macrotera, Macroteropsis, Macroterella and Cockerellula (Hymenoptera: Andrenidae). The University of Kansas Science Bulletin 55 (6):635-692.:676, Holotype ♂ (CAS, No. 14670). - Timberlake, 1960Timberlake, P.H. 1960. A revisional study of the bees of the genus Perdita F. Smith, with special reference to the fauna of the Pacific Coast (Hymenoptera, Apoidea). Part IV. University of California Publications In Entomology 17 (1):1-156. (distribution); Timberlake, 1968Timberlake, P.H. 1968. A revisional study of the bees of the genus Perdita F. Smith, with special reference to the fauna of the Pacific Coast (Hymenoptera, Apoidea). Part VII. University of California Publications In Entomology 49:1-196. (distribution); Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209. (distribution); Timberlake, 1980Timberlake, P.H. 1980. Supplementary studies on the systematics of the genus Perdita (Hymenoptera, Andrenidae). Part II. University of California Publications In Entomology 85:1-65. (distribution); Danforth, 1996Danforth, B.N. 1996. Phylogenetic analysis and taxonomic revision of the Perdita subgenera Macrotera, Macroteropsis, Macroterella and Cockerellula (Hymenoptera: Andrenidae). The University of Kansas Science Bulletin 55 (6):635-692. (distribution). - As Macrotera portalis: - Nava-Bolaños & Osorio-Olvera, 2022Nava-Bolaños, A. & L. Osorio-Olvera 2022. Estado del arte del conocimiento de biodiversidad de los polinizadores de México. Revista Mexicana de Biodiversidad 93:1-77. (distribution).