Genus: Epanthidium Moure, 1947
Subgenera: Ananthidium, Carloticola, Epanthidium
Common name: none
Epanthidium range from robust to moderately elongate body form. Small Epanthidium range in body length from 6.5–7.5 mm, while large Epanthidium range in length from 9–12 mm. They have black integument, sometimes tinged with red, and have yellow to cream-colored maculations on their head, thorax, and abdomen (Michener 2007).
Epanthidium contains approximately 23 species within 3 subgenera (Michener 2007); none are known to occur in the U.S. or Canada.
(modified from Michener 2007)
There are no known invasives.
Little is known about the floral resources used by Epanthidium. In the subgenus Epanthidium, many species appear to be generalists, visiting a wide variety of plants including Zygophyllaceae, Fabaceae, and Asteraceae (Parizotto and Melo 2015).
Epanthidium are solitary bees that build nests primarily from plant resins. Epanthidium tigrinum builds nests consisting of groups of cells in preexisting cavities (Michener 2007). The two known species of the subgenus Ananthidium construct nests in stems that consist of one or two cells made from resin or a plant fiber and resin composite (Stange 1983). Nests from Epanthidium (Ananthidium) dilmae have been collected from dead branches of Asteraceae and in shrub vegetation approximately 0.5 m above the ground (Parizotto and Melo 2015). Epanthidium aff. sanguineum was observed occupying abandoned nests of Centris muralis, which were constructed in adobe walls (Cilla and Rolón 2012). Epanthidium aff. sanguineum collected materials from Larrea spp. to line their nests (Cilla and Rolón 2012).
Epanthidium are restricted to the Western Hemisphere and are Neotropical in distribution, ranging from central Mexico south to Argentina (Michener 2007).