A review of the anthidiine bees (Apoidea, Megachilidae) in Thailand Author Nalinrachatakan, Pakorn https://orcid.org/0000-0001-7962-5844 Center of Excellence in Biology and Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand Author Ascher, John S. https://orcid.org/0000-0002-7887-2461 Insect Diversity Lab, Department of Biological Sciences, National University of Singapore, 16 Science Drive 4 S 3 Level 4, 117558 Singapore, Singapore Author Kasparek, Max https://orcid.org/0000-0002-5604-6791 Moenchhofstr., 16, 69120 Heidelberg, Germany Author Traiyasut, Prapun https://orcid.org/0000-0002-7114-0890 Program in Biology, Faculty of Science, Ubon Ratchathani Rajabhat University, Ubon Ratchathani 34000, Thailand Author Thanoosing, Chawatat https://orcid.org/0000-0002-4228-748X Center of Excellence in Biology and Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand & Department of Life Sciences, Natural History Museum, Cromwell Road, London SW 7 5 BD, UK Author Warrit, Natapot https://orcid.org/0000-0002-6338-1782 Center of Excellence in Biology and Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand ich108@hotmail.com text ZooKeys 2023 2023-12-19 1186 235 284 http://dx.doi.org/10.3897/zookeys.1186.95203 journal article http://dx.doi.org/10.3897/zookeys.1186.95203 1313-2970-1186-235 4417B04CBD9449DC95133B89EB6E5F72 94A58877E81E514DB42E312A2327809C Bathanthidium (Manthidium) binghami (Friese, 1901) Fig. 5 Anthidium fraternum Bingham, 1897 (nec Perez 1895 ): 495 (♀). Holotype from Tenasserim, Myanmar, image also examined in NHMUK under https://data.nhm.ac.uk/media/02e0fc5c-8359-4414-89a1-7d0a53aeded3. Anthidium binghami Friese, 1901: 224, replacement name for Anthidium fraternum Bingham, 1897. Manthidium binghami (Friese, 1901): Pasteels 1969 : 43. Stelis siamensis Friese, 1925: 40 (♂). Holotype from "Siam bei Hinlap" [= Nan province, Thailand] (ZMB, examined). Paraanthidium concavum Wu, 1962: 164 (♂). Holotype from China, Yunnan, Xishuangbanna (IZCAS: Institute of Zoology, Chinese Academy of Sciences, images examined). Trachusa (Paraanthidium) concavum (Wu, 1962): Wu 2006 : 174, ♂ (key), 184, ♂ (redescription), fig. 100a-e. Bathanthidium (Manthidium) binghami (Friese, 1901): Rasmussen and Ascher 2008 : 30; Niu et al. 2019 : 106, fig. 8A-H; Sardar et al. 2022 : 78, fig. 6. Material examined. ( 2♂ ). India : 1♂ , West Bengal , Buxa Tiger Reserve , 22 miles , East Damanpur ( 26°37.067'N , 89°33.633'E ), 27 Mar. 2019 , A. Rameshkumar (ZSI) as in Sadar et al. (2022) . Thailand : 1♂ , Siam [= Thailand], Hinlap [= Nan province , "Hinlap" must refer to the area of "Baan Hinlap", or "Huai Hinlap reservoir" as currently named (not in Chaiyaphum province ) in Pua district , Sila lang Subdistrict], Januar [= January], H. Fruhstorfer , Stelis siamensis , ♂ , 1904, Friese det., Type (ZMB). Records from iNaturalist (2023). Thailand: Chiang Mai Province, Chiang Dao District, ( 19°24'44.3"N , 98°55'17.3"E ) observed by 'charlieglasser' on 23 Mar 2023 (observation id: 160344574 and 160340826). Distribution. China (Yunnan), India (Sikkim, West Bengal), Myanmar (Tenasserim), Thailand (Chiang Mai (new record from iNaturalist 2023 ), Nan), Laos (Luang Prabang). Diagnosis. Bathanthidium binghami has a robust, small to medium-sized body with black integument disrupted by striking yellow markings. The species is distinctly separated from its congeners by the combination of the follows: yellow on its mandible, clypeus, and paraocular area that do not exceed beyond the antennal socket plane; narrow yellow stripe laterally on T2-T5, while tending to abut together on the rear segment; yellow stripe on T6 and also T7 in male; rounded omaulus; T6 (also in the smaller male T7) sub-truncate, with distinct median elevation that extends its apical margin (Fig. 5C, F ; Niu et al. 2019 : fig. 8E). Remarks. Bathanthidium was revised by Niu et al. (2019) , where Stelis siamensis Friese, 1925, historically collected from Nan, Thailand, was synonymized under B. binghami . Niu et al. (2019) also thoroughly provided pictures of the female holotype of " Paraanthidium concavum " in comparison to other species. Sadar et al. (2022) pointed out the problematic documentation of its distribution (erroneously recorded for India) while confirming that B. binghami was found in India. The species displays the unique sub-truncate apical terga in both sexes. Through personal communication with Mr. Charles H. Glasser, who provided the iNaturalist records, we know that the bee inhabits farmland cultivated by the indigenous people of Lisu tribe.