Anthidiellum (Pycnanthidium) ayun Tran, Engel & Nguyen, sp. nov., holotype, female A dorsolateral oblique habitus B dorsal habitus C facial view D mesosoma in dorsal view E head and anterior mesosoma in profile, red arrow indicating omaular carina F dorsal oblique view of metasoma G prolateral surfaces of metatibia and metatarsus, with red arrows indicating longitudinal carinae H metapretarsal arolium (red arrow). Scale bars: 1 mm (A–G); 0.5 mm (H).

 
 
  Part of: Tran NT, Engel MS, Nguyen CQ, Tran DD, Nguyen LTP (2023) The bee genus Anthidiellum in Vietnam: descriptions of five new species and the first male of Anthidiellum coronum (Hymenoptera, Megachilidae). ZooKeys 1144: 171-196. https://doi.org/10.3897/zookeys.1144.98644