A new genus of minute stingless bees from Southeast Asia (Hymenoptera, Apidae).

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.