• Family: Megachilidae
• Tribe: Anthidiini
• Approximate # species in region: 1
• Common name: rotund-resin bees

Anthidiellum are tiny, compact anthidiines that are associated with dry, sandy habitats. Bees in this genus build nests out of tree resin. In the northeast, Anthidiellum nests are resinous jug-like structures that hang from vegetation, each of which contains a single developing offspring. Anthidiellum can be locally abundant, especially when host plants are abundant, and males and females are often seen mating for extended periods of time on flowers. Members of this genus are usually boldly marked with some combination of black, yellow, and red integument.