In Minnesota, there is one described species within the genus Anthidiellum—Anthidiellum boreale. This species was recently recorded in the state in 2022 by the Minnesota Department of Natural Resources bee researchers. In 2024, it was observed in one other location visiting Monarda punctata in a sand prairie. Anthidiellum boreale constructs freeform oblong resin nests with mud or pebble additions, attached to vegetation. The nests are bottle- or vessel-shaped with a downward-facing "nect". Each nest usually contains one brood cell. This bee is robustly shaped but generally smaller than other species in the tribe Anthidini. It has a dark gray or black integument and yellow markings on the head, thorax, and abdomen. The legs and tegulae are red/orange. Both males and females are fast flyers.

Bees in the genus Anthidiellum have a curved subantennal suture, an arolium (pad between the front tarsal claws), and a scutellum that projects like a shelf over the propodeum. They range in length from 5 to 10 mm (0.2 to 0.4 inches).