Abstract
A new species of Teleopsis (Diptera, Diopsidae) from Chiang Mai, Thailand is described and illustrated. Teleopsis thaii Földvári & Carr is shown to be a member of a species group, termed the dalmanni species group, along with three previously described species. Presented here are a morphological description of T. thaii and an allometric comparison of the species with other members of the Teleopsis genus. We also present multi-gene phylogenetic analyses to highlight the possible position of T. thaii within the dalmanni species group.References
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