Female Anthidiellum ignotum Engel, 2009 A, B lateral habitus and mesosoma of the “less melanized” individual (BSRU-AA-1250) C, D lateral habitus and mesosoma of an individual with a black scutellum mark (BSRU-AA-6709) E female faces and metasoma, showing variations of black infused stigma. From left to right: BSRU-AA-2668, 1250, 1249, 6708, 6709, and CMU-0013. Scale bars: 2 mm (A, B) or 1 mm (C, D).

 
 
  Part of: Nalinrachatakan P, Traiyasut P, Khongnak A, Muangkam M, Ascher JS, Warrit N (2021) The resin bee subgenus Ranthidiellum in Thailand (Megachilidae, Anthidiini): nesting biology, cleptoparasitism by Stelis, and new species. ZooKeys 1031: 161-182. https://doi.org/10.3897/zookeys.1031.57836