Engel Michael S, Nguyen Lien Thi Phuong, Tran Ngat Thi, Truong Tuan Anh, Motta Andrés F Herrera
Division of Entomology, Natural History Museum, University of Kansas, 1501 Crestline Drive - Suite 140, Lawrence, Kansas 66045, USA.
Department of Ecology & Evolutionary Biology, University of Kansas, Lawrence, Kansas 66045, USA.
Zookeys. 2022 Mar 16;1089:53-72. doi: 10.3897/zookeys.1089.78000. eCollection 2022.
A new genus of minute stingless bees (Meliponini: Hypotrigonina) is described from Southeast Asia. Engel & Nguyen, , is based on the type species Engel, recorded from Vietnam, Thailand, Laos, Cambodia, and southern China. The species was previously considered an enigmatic member of Moure, but is removed to a new genus based on its unique male terminalia that differs considerably from that of and instead shares resemblances with Moure, and the presence of yellow maculation (also similar to that of ). It is possible that is the extant sister group of , but this requires confirmation by future phylogenetic analyses. Based on available biological observations, could not be confirmed as lachryphagous as is well documented from the tear-drinking species of and Moure.
东南亚地区描述了一种新的小型无刺蜂属（Meliponini: Hypotrigonina）。Engel & Nguyen, ，该属以模式种Engel为基础，记录于越南、泰国、老挝、柬埔寨和中国南部。该物种以前被认为是Moure的一个神秘成员，但基于其独特的雄性外生殖器而被归入一个新属，该雄性外生殖器与 的有很大不同，反而与Moure的相似，并且存在黄色斑纹（也与 的相似）。有可能 是 的现存姐妹群，但这需要未来的系统发育分析来证实。根据现有的生物学观察，无法像 和Moure的吸泪物种那样确凿地证实 为吸泪性。
