Published November 6, 2025
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New species of Labiobaetis Novikova & Kluge from Thailand (Ephemeroptera, Baetidae)
Authors/Creators
- 1. University of Lausanne (UNIL), Lausanne, Switzerland|Naturéum, Muséum cantonal des Sciences Naturelles, Lausanne, Switzerland
- 2. Biodiversity Center Kasetsart University (BDCKU), Bangkok, Thailand|Kasetsart University, Bangkok, Thailand
- 3. Chiang Mai University, Chiang Mai, Thailand
Description
Investigations of material collected by one of us (CS) between May 2017 and November 2023 from 70 localities in Thailand further increases our knowledge of the diversity of the genus Labiobaetis Novikova & Kluge, 1987 in Thailand and Southeast Asia in general. Eleven species have been identified using a combination of morphological and molecular analysis (COI). Nine are new to science, they are described and illustrated based on their larvae, and in one case, complemented by the male imago. Two of the new species belong to the L. batakorum species group, L. mon sp. nov., L. lahu sp. nov.; three to the L. numeratus species group, L. tenasserimensis sp. nov., L. angularis sp. nov., L. tonsator sp. nov.; one to the L. operosus species group, L. nisaratae sp. nov., and three to the L. sumigarensis species group, L. karen sp. nov., L. septem sp. nov., L. ranongensis sp. nov. A key to all species of Labiobaetis from continental Southeast Asia is provided. Additionally, the genetic distances (COI; Kimura-2 parameter) including all species treated in this study are discussed. The total number of Labiobaetis species worldwide is augmented to approximately 170.
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