Oil rewarding flowers: Stigmaphyllon bonariense (Hook. and Arn.) C.E. Anderson and Stigmaphyllon jatrophifolium A. Juss (Torretta et al. 2022).
References
SCHROTTKY, C. 1913. La distribución geográfica de los himenópteros argentinos. An. Soc. Cient. Argent. 75: 180-286
WITTMANN, D. & HOFFMANN, M. 1990. Bees of Rio Grande do Sul, Southern Brazil (Insecta, Hymenoptera, Apoidea). Iheringia, Sér. Zool. 70: 17-43
ROIG-ALSINA, A. 2000. Claves para las especies argentinas de Centris (Hymenoptera, Apidae), con descripción de nuevas especies y notas sobre distribución. Rev. Mus. Argent. Cienc. Nat. (n.s.) 2 (2): 171-193
VIVALLO, F. 2019. Lectotype designations, taxonomic notes and new synonymies in some species of the bee genus Centris Fabricius, 1804 described by Amédée Lepeletier de Saint-Fargeau (Hymenoptera: Apidae). Zootaxa 4624: 23-40
VIVALLO, F. 2020c. The species of the bee genus Centris Fabricius (Hymenoptera: Apidae) described by Giovanni Gribodo. Rev. Chil. Entomol. 46 (1): 51-59
VIVALLO, F. 2020e. The species of the bee genus Centris Fabricius, 1804 described by Curt Schrottky (Hymenoptera: Apidae).
TORRETTA, J.P., ALISCIONI, S. S., MARRERO, H.J., AVALOS, A. A. 2022. Oil flowers of Malpighiaceae and its oil-collecting bees: loyalty and robbery in a highly specialized system. Apidologie 53: 30