The treatment revisits Pristaulacus vietnamensis, whose holotype is from Viet Nam, and documents female specimens from Loei, Lampang and Chaiyaphum in Thailand. Diagnostic traits include a 9-10 mm mostly black body, a dark forewing spot, a very long petiole, an ovipositor 1.3 times forewing length and a four-toothed tarsal claw. The material broadens its cross-border distribution, while the host remains unknown.
Key findings
- Thai specimens come from several protected areas in three provinces. • The record supports a Thailand-Viet Nam distribution. • The parasitoid host remains unknown.
Why this matters globally
Multi-locality specimens improve cross-border biodiversity mapping and guide future surveys in Southeast Asian forests.
Thai researcher contribution
A team including a Chulalongkorn University researcher interprets specimens from several Thai national parks.
Limitations to consider
The evidence consists of female museum specimens with no host data; current range, abundance and genetic variation remain unknown.