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Genus Anthidiellum - Rotund Resin Bees

Anthidiellum? - Anthidiellum perplexum - male - female Anthidiellum notatum rufimaculatum? - Anthidiellum perplexum bee - Anthidiellum perplexum Anthidiellum notatum megachilid 2 - Anthidiellum notatum Wool-carder Bee? - Anthidiellum notatum escape hole in nest - Anthidiellum notatum Anthidiellum notatum? - Anthidiellum notatum
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon (Aculeata - Ants, Bees and Stinging Wasps)
No Taxon (Anthophila (Apoidea) - Bees)
Family Megachilidae (Leafcutter, Mason, and Resin Bees, and allies)
Subfamily Megachilinae
Tribe Anthidiini
Genus Anthidiellum (Rotund Resin Bees)
Explanation of Names
Anthidiellum Cockerell
Numbers
4 spp. in our area (all in the subg. Loyolanthidium), 60 spp. in 7 subgenera worldwide(1)
Identification
In this genus, the subanntennal suture

is clearly bowed toward the eyes. In other Athidini this suture is straight. (2)

The colored “line” at the base of the head
and
angles to form a strong, shelflike appearance. It can sometimes cover a portion of the start of the thorax. (2)

The scutellum

appears swollen and overhangs the propodeum (2)
Range
NA and much of the Old World (warmer parts); across the US; A. notatum is the only sp. to reach Canada(1)
Remarks
The cells are attached to rocks or to vegetation.
Internet References
U. Florida - Key to tribe Anthidini