A new species, Agapetus kaengkrungensis (Trichoptera: Glossosomatidae) from Kaeng Krung National Park, southern Thailand with the distribution map of the genus in Thailand Author Vadon, Solomon Boga 0000-0003-4831-8854 Faculty of Science and Industrial Technology, Prince of Songkla University, Surat Thani Campus, Muang District, Surat Thani Province, Thailand 84100. & 5940330301 @ psu. ac. th; https: // orcid. org / 0000 - 4831 - 8854 5940330301@psu.ac.th Author Pongtipati, Pattira 0000-0002-1370-9313 Faculty of Innovative Agriculture and Fishery Establishment Project, Prince of Songkla University, Surat Thani Campus, Muang District, Surat Thani Province, Thailand 84100. & pattirataweepreda @ yahoo. com; https: // orcid. org / 0000 - 0002 - 1370 - 9313 pattirataweepreda@yahoo.com Author Laudee, Pongsak 0000-0003-3819-7980 Faculty of Innovative Agriculture and Fishery Establishment Project, Prince of Songkla University, Surat Thani Campus, Muang District, Surat Thani Province, Thailand 84100. pongsak.l@psu.ac.th text Zootaxa 2021 2021-04-28 4965 2 396 400 journal article 7014 10.11646/zootaxa.4965.2.12 e9b9784d-8155-4745-a795-069fc0120390 1175-5326 4750338 828F1BE6-282F-4CAA-A063-6C9294B90EC5 Agapetus kaengkrungensis n. sp. Figs 1A–1D Diagnosis. The male genitalia of the new species are similar to those of A . abbreviatus Ulmer 1931 found in Java , Indonesia , but can be distinguished from them by characters of segment IX and the inferior appendages. In A . abbreviatus , the posterodorsal end of segment IX is truncate in lateral view, but it is slightly downcurved and acute apically in the new species. The inferior appendages of A . abbreviatus are oval in lateral view, but those of the new species are long and rectangular, each with a short, apically rounded process apicoventrally. In ventral view, each inferior appendage of the new species has a pointed spine ventromedially and two stout spines apically, but has no spine ventromedially and is pointed apically in A . abbreviatus . Description. Length of each male forewing 3.0 mm. Specimens in alcohol with head, thorax, abdomen, legs, and forewings dark brown. FIGURE 1. Male genitalia of Agapetus kaengkrungensis n. sp. 1A, left lateral. 1B, dorsal. 1C, ventral. 1D, phallus, left lateral. FIGURE 2. Distribution map of Agapetus spp. in Thailand. (Data on the map are from the references and the collections of Dr. Pongsak Laudee and Prof. Dr. Hans Malicky) Male genitalia ( Figs. 1A–1D ). Segment IX in lateral view subrectangular with very long process anteroventrally and long process posterodorsally ( Fig. 1A ); in dorsal view, quadrate with broad and shallow concavity anteriorly ( Fig. 1B ); nearly square in ventral view ( Fig. 1C ). Preanal appendages long, finger-like, rounded apically in lateral view ( Fig. 1A ); in dorsal view, finger-like with tuft of setae dorsolaterally, rounded apically ( Fig. 1B ). Segment X in lateral view, subrectangular basally, large and bulbous subapically ( Fig. 1A ); in dorsal view, long, subtriangular with narrow mesal incision 3/4 of its length ( Fig. 1B ). Inferior appendages in lateral view, long, subrectangular, entirely setose, each with short, apically rounded process apicoventrally ( Fig. 1A ); in ventral view, claw-like with pointed projection ventromesally and two stout and acute projections apically ( Fig. 1C ). Phallus long, regular, blunt apically with seven sclerotized spines on the retracted subphallic membranes. ( Fig. 1D ). Type material. Holotype male (PSUNHM). Thailand : Surat Thani Province , Kaeng Krung National Park , Khlong Yan River , 9°19’13”N , 103°49’54”E , ca. 59 m a.s.l. , 28.ix.2019 , leg. Solomon Boga Valdon. Etymology. The species is named for the type locality, Kaeng Krung National Park.