Anthidium (Severanthidium) are robust, black bees with yellow markings and a wide, flat head (Michener 2007). The yellow markings can be restricted to the head and thorax. The abdomen varies in color from black, to yellow-brown, to red, and the abdominal bands are broken and lack an emargination (Michener 2007). They range in body length from 7–13 mm (Michener 2007).
(modified from Michener 2007)
Anthidium (Severanthidium) may be confused with bees in the genus Pachyanthidium due to similar body form and coloration (Michener 2007). Male A. (Severanthidium) may also be confused with bees in the subgenus A. (Proanthidium) due to the medially emarginated T7 that forms two rounded lobes. However, A. (Severanthidium) can be differentiated from Pachyanthidium and A. (Proanthidium) due to the distinguishing characteristics listed above (Michener 2007).
Floral associations are unknown.
Nesting behavior is unknown.
Anthidium (Severanthidium) consists of ten species (Michener 2007); none are known to occur in the U.S. or Canada.
There are no known invasives.
Anthidium (Severanthidium) occur in Oman and throughout sub-Saharan Africa, from Cape Province, South Africa to Senegal and Sudan (Michener 2007).