Type locality and larval habitats of Megabranchiella gen. nov. A–C type locality and larval habitats of M. scutulata sp. nov. A Mae Kampong stream, The Royal Project of Teen Tok, Chiang Mai Province B Pong Phra Baht Waterfall, Chiang Rai Province C fast-flowing water with pebble and cobble habitats (D–F) type locality and larval habitats of M. longusa sp. nov. D Siribhum waterfall, Chiang Mai Province E Sapan River, Bor Kluea district, Nan Province F fast-flowing water with boulder, cobble, and pebble habitats.