Review of the intertidal rove beetle tribe Liparocephalini Fenyes (Coleoptera, Staphylinidae, Aleocharinae) from Japan Author Tasaku, Yuto Department of Biology, School of Biological Sciences, Tokai University, Hokkaido, 005 - 8601, Japan. & Corresponding author Author Ono, Hiroki Sounan, Minami-ku, Sagamihara-shi, Kanagawa, 252 - 0312, Japan. Author Maruyama, Munetoshi The Kyushu University Museum, Hakozaki 6 - 10 - 1, Higashi-ku, Fukuoka, 812 - 8581, Japan. text Zootaxa 2023 2023-12-12 5383 3 251 296 https://www.mapress.com/zt/article/download/zootaxa.5383.3.1/52454 journal article 10.11646/zootaxa.5383.3.1 1175-5326 10361564 20988E42-C14D-4878-A716-8CEAB5E5EF92 Paramblopusa sumikawai Tasaku, Ono & Maruyama , sp. n. [Japanese name: Menashi-nise-nokoba-umi-hanekakushi] ( Figs. 21E–H ) Type material. Holotype . Male , “ Japan : Hokkaidô / Samani-tyô, Horoman / 2. V. 2023 , D. Sumikawa ” (abdominal segments VIII-X and aedeagus are dissected) ( Fig. 21E ) ( KUM ) . Paratype . 1 female , same data as holotype (head, abdominal segments VIII–X, and aedeagus are dissected) ( KUM ) . Diagnosis. This new species is similar to other species of Paramblopusa but can be distinguished by the following characteristics: eyes absent, body color yellowish brown. Description. Body slender, and flattened. Body color yellowish brown. Head almost circular; eyes absent; antennae longer than head and pronotum combined; segment I longest, as long as segment II and III combined; segment II shorter than I; segments III–VIII as long as wide; segments IX and X slightly wider than long; segment XI about 1.5 times longer than wide. Labrum rectangular and transverse, with about 20 setae. Mandibles symmetric, with 3 or 4 small teeth between apex and median tooth. Maxillary palpi 4 segmented; segment I very short; segment II and III ovular; segment IV thin, as long as II. Labium: prementum without medial seta; ligula unilobed, short; labial palpi 3 articled, segment II thinner than I. Mentum almost triangular, incised at apex. Pronotum flattened and subquadrate. Elytra longer than wide, and almost adherent. Abdomen almost parallel-sided. Legs: tarsi very short; tarsal formula 4-4-5. FIGURE 21 Habitus & genitalia of Paramblopusa spp. A –D, P . borealis ; E–H, P . sumikawai sp. n. A & E, Habitus; B & F, median lobe of aedeagus; C & G, spermatheca; D & H, apical lobe of paramere. Scale bars: 1.0 mm for A & E; 0.1 mm for B–D, F–H. FIGURE 22 Mouth parts of Paramblopusa borealis . A, labrum (right side, dorsal view; left side, ventral view (epipharynx)); B, mentum; C, labium; D, maxilla; E, right mandible. Scale bar: 0.1 mm. FIGURE 23 Distribution and habitat of Diaulota aokii , D . decipiens sp. n. , and D . hokkaidona . A, known localities in Japan (red ring, type locarity of D . aokii ; red circle, D . aokii ; blue square, D . hokkaidona ; yellow triangle, D . decipiens sp. n. ); B, habitat of D . aokii (Izu-ôshima); C, habitat of D . hokkaidona ; white arrow, adults of eating barnacle (Nemuro-shi, Hokkaidô, Photographed by Tomoki Kikuchi). Male: tergite VIII, apical margin truncate; sternite VIII, apical margin slightly prolonged posteriorly; median lobe short and thick, apical lobe short, slightly pointed ( Fig. 21F ); apical lobe of paramere slender ( Fig. 21H ). Female: tergite VIII, apical margin truncate; sternite VIII, apical margin rounded; spermatheca small, apical part circular, coiled twice at base ( Fig. 21G ) Measurements. ( Holotype , male): FBL, 0.84 mm ; HW, 0.36 mm ; PL, 0.34 mm ; PW, 0.36 mm ; EW, 0.33 mm . Etymology. The specific name is named after Mr. Daisuke Sumikawa, the collector of the type series of the new species. Remarks. Measurements were taken after the holotype other than BL because the paratype was dissected. Habitat. This new species was collected from a beach gravel ( 1.5–20 mm in diameter) together with Amblopusa brevipes and Paramblopusa borealis (personal comments from D. Sumikawa). Distribution. Japan : Hokkaidô .