Abstract: In this study, we contribute to the knowledge of the psocid fauna of Vietnam by reporting four species for the first time for the territory of the country: Amphipsocus unitoides New et Thornton, 1976, Isophanes capeneri Smithers, 1956, Peripsocus medimacularis Li, 1995, and Sigmatoneura kolbei (Enderlein, 1906). Additionally, we provide four new distribution localities for Caecilius fuscopterus (Latreille, 1799), a species first recorded in Vietnam as a smaller variety by Enderlein (1903). All specimens were collected from various habitats in northern Vietnam during October 2025.
Keywords: biodiversity, equatorial, habitats, insects, SE Asia
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Additional information
Received: 23 February 2026 · Accepted: 4 September 2026
Editor: Stanislav Abadjiev
Conflicts of interest:
No potential conflict of interest has been reported by the authors, reviewers, or subject editor.
Authors’ contributions (using CrediT ↗):
Dilian Georgiev: conceptualisation, data curation, formal analysis, investigation, methodology, resources, visualisation, writing—original draft, writing—review and editing; Ognyan Todorov: funding acquisition, investigation, writing—review and editing.
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Cite as
Georgiev D., Todorov O. 2026 New records of Psocodea (Insecta) from Vietnam. Historia naturalis bulgarica 48: 307–310.