The nomiine bee genus Gnathonomia in Vietnam (Hymenoptera: Halictidae: Nomiinae)
Tran Ngat Thi, Nguyen Lien Thi Phuong, Engel Michael S.
Acta Entomologica Musei Nationalis Pragae 66(1): 129-147, 2026
Published online: 19th August 2026
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Abstract: Three species of the genus Gnathonomia Pauly, 2005 (Hymenoptera: Halictidae:
Nomiinae) are reported from Vietnam. Two species, Gnathonomia aurata (Bingham,
1897) and G. pieli (Cockerell, 1931) are recorded from Vietnam for the first
time, while G. thoracica (Smith, 1875) is the most common species in the
country. One species, G. fusciventris Zhang & Niu, 2020, syn. nov., is
treated as a junior synonym of G. pieli. An illustrated key to the Vietnamese
species of Gnathonomia is presented along with a summary of their distributions.
Key words: Hymenoptera, Halictidae, Nomiinae, halictid bees, morphology, new record, new synonym, taxonomy, Vietnam, Oriental Region
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