Orthotrichia choengthongi, sp. nov. Male genitalia A tergum IX and tergum X, dorsal B terga IX and X and inferior appendages, left lateral C terga IX and X and inferior appendages, right lateral D inferior appendages and paramere, ventral E phallus, left lateral. Abbreviations: Te IX = tergum IX, Pos = Posterolateral process (paired), Do = Doral spine, Te X = tergum X, Inf = united inferior appendages, Tu = Tubular processes, Par = Paramere.

 
 
  Part of: Thamsenanupap P, Malicky H, Vongsombath C, Laudee P (2021) Three new species of caddisflies (Trichoptera, Hydroptilidae, Polycentropodidae, Leptoceridae) from Khon Phapheng Waterfall, the Mekong River, Laos. ZooKeys 1055: 149-159. https://doi.org/10.3897/zookeys.1055.66536