Trigona (Dichrotrigona), Engel, 2021

Subgenus Dichrotrigona Engel, 2021

Diagnosis (Adapted from Engel 2021): Integument predominantly black; mandible with five teeth; labrum simple; metatibia enlarged and flattened, with the outer surface close to the concave apical third; metatibia with developed corbicula; forewing membrane dichroic, proximally infuscate, apically whitish; and metasoma elongated.

Comments: The character “metasoma elongated” is added here in the diagnosis of the subgenus for the first time. As reported by Engel (2021), this subgenus is similar to T. ( Aphaneuropsis) in pattern of wing coloration. Still according to this author, T. ( Dichrotrigona) easily differs from T. ( Aphaneuropsis) in the five mandibular teeth, among other characters. However, we believe that the metasoma elongated can be very useful for identifying this subgenus, especially to differ from T. ( Trigona s. str.) (metasoma subtriangular, except T. ( Trigona s. str.) dallatorreana ).