https://journals.ku.edu/melittology/article/view/4652/5894
View of Bees of the genera Dufourea and Dieunomia of Michigan (Hymenoptera: Apoidea: Halictidae),...
https://eunis.eea.europa.eu/species/254279
Dufourea iris - Ebmer, 1987
Dufourea iris belongs to the Invertebrates group
dufoureairis
https://eunis.eea.europa.eu/species/319725
Dufourea styx - Ebmer, 1976
Dufourea styx belongs to the Invertebrates group
dufoureastyx