New record of the genus Typhlocolenis Hoshina, 2008 (Coleoptera, Leiodidae) from South Korea with a key to the species Author Hoshina, Hideto Faculty of Education, University of Fukui, Fukui City 910 - 8507, Japan Author Park, Sun-Jae National Institute of Biological Resources, Incheon City 22689, South Korea https://orcid.org/0000-0003-3759-6517 sun1763@korea.kr text ZooKeys 2020 991 129 136 http://dx.doi.org/10.3897/zookeys.991.55370 journal article http://dx.doi.org/10.3897/zookeys.991.55370 1313-2970-991-129 5C93E895370A4998B47A3B504ABFC84B 5872FEED3928587092730F2F8ED30EBF Typhlocolenis jejudoensis Hoshina & Park sp. nov. Figures 2 , 4 , 9 , 10 , 14 , 15 Type locality. South Korea, Jejudo Is., Jeju-City, Goepyeongioreum Material examined. Holotype , ♂ (NIBR): KOREA, Jejudo Is., Jeju-City, Goepyeongioreum, 13. vi. 2005, S.-I. Lee leg. Paratypes , 3♀ (NIBR): same data as holotype; 1♂ 5♀ (NIBR): Jejudo Is., Jeju-City, Bijarium, 12. vi. 2005, S.-J. Park leg.; 2♂ 2♀ (NIBR): Jejudo Is., Jeju-City, Dongbaekdongsan, 13. vi. 2005, S.-I. Lee leg.; 2 exs. (NBIR): Jejudo Is., Jeju-City, Dongbaekdongsan, 22. v. 2006, S.-I. Lee & Y.-H. Kim leg. Diagnosis. The present species very similar to Typhlocolenis sillaensis Hoshina & Park, sp. nov. Body length approximately 1.3-1.4 mm. Dorsum almost concolorous, brown to blackish brown. Head and pronotum strongly microreticulate, sparsely and very minutely punctate. Elytra almost smooth, sparsely and very minutely punctate, and densely and transversely strigose. The median lobe of aedeagus relatively thick, strongly expanded at about middle of lateral margins, and bearing a small nipple at apex in dorsal view. Description. Measurement of holotype . Body length: 1.30 mm; head length: 0.24 mm, width: 0.35 mm; pronotum length: 0.40 mm, width: 0.71 mm; elytron length: 0.73 mm, width: 0.73 mm. Coloration . Dorsum of body shiny and almost concolorous, brown to blackish brown; mesoventrite brown or dark reddish brown with a black median carina; metaventrite brown or dark reddish brown with a dark brown median carina; abdominal ventrites brown or dark reddish brown; legs brown with light brown tarsi. Body 1.28-1.42 mm in length, approximately 1.7 times as long as wide (Fig. 2 ). Head approximately 1.5 times as wide as long, strongly microreticulate, sparsely and very minutely punctate; head length approximately 0.61 times pronotum length; head width approximately 0.48 times pronotum width; antennomeres 1-4 and 11 longer than wide; antennomere 5-7 almost as long as wide; other antennomeres wider than long; antennomere 11 approximately 1.3 times as long as wide (Fig. 4 ). Pronotum approximately 1.8 times as wide as long, strongly microreticulate, sparsely and very minutely punctate; pronotum length approximately 0.52 times elytron length; pronotum width almost same as or slightly narrower than elytron width. Scutellum weakly microreticulate and almost impunctate or sparsely and very minutely punctate. Elytra almost as long as or slightly longer than wide, widest at approximately basal 1/6, almost smooth, sparsely and very minutely punctate, and densely and transversely strigose (Fig. 6 ). Legs show no sexual dimorphism on protarsi and normal shape for Typhlocolenis . Meso- and metaventrites strongly microreticulate, almost impunctate, and glabrous; abdominal ventrites strongly microreticulate, almost impunctate, and bearing sparse and very fine pubescence. Male. Aedeagus generally thick (Figs 9 , 10 ); median lobe of aedeagus strongly expanded at about middle of lateral margins, and bearing a small nipple at apex in dorsal view (Fig. 9 ), slightly, and weakly curved in lateral view (Fig. 10 ); parameres almost symmetrical and bearing several apical setae (Figs 9 , 10 ). Female. Spermatheca generally C-shaped (Fig. 14 ). Etymology. The specific name is derived from the type locality, Jejudo Island. Distribution. South Korea (Jejudo Island) (Fig. 15 ). Differential diagnosis. Typhlocolenis jejudoensis sp. nov. is similar to T. sillaensis sp. nov. in appearance but can be distinguished by being strongly expanded at about middle of lateral margins in dorsal view (Fig. 9 ). In contrast, T. sillaensis sp. nov. has a very feebly curved median lobe in dorsal view (Fig. 7 ). Moreover, T. jejudoensis sp. nov. resembles T. furunoi Hoshina, 2008 in appearance but can be distinguished by median lobe of aedeagus with a small nipple at the apex in dorsal view (Fig. 9 ). In contrast, T. furunoi has a median lobe broadly rounded at the apex (Fig. 12 ). Natural history. The life history of Typhlocolenis jejudoensis Hoshina & Park, sp. nov. is not known.