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Anthidium is a genus of bees often called carder or potter bees, who do not cut leaves, but use conifer resin, plant hairs, mud, or a mix of them to build nests. Like other members of the family Megachilidae (most of which are called "leafcutter bees"), they are solitary bees with pollen-carrying scopa that are only located on the ventral surface of the abdomen (other bee families have pollen-carrying structures on the hind legs). The ~80 species are distributed primarily in the Northern Hemisphere, and South America.