Anthidiellum Cockerell, 1904

Anthidium (Anthidiellum) Cockerell, 1904: 3. Type species: Trachusa strigata Panzer, 1805, by original designation.

Note.

Anthidiellum is a small-robust genus that has an arcuate subantennal suture (Fig. 2C), carinated omaulus (see Fig. 2A), open scutoscutellar suture (see Fig. 2B), and presence of a propodeal fovea behind the spiracle. Two distinct subgenera were recognized in Thailand: Pycnanthidium Krombein, 1951, with a generally black-yellow integument and a prominent frontal carina on T1; and Ranthidiellum Pasteels, 1969, which is slightly larger in comparison, with a general black to reddish brown integument (Fig. 4A, B), and with a general appearance similar to a stingless bee.