Micranops orientasiaticus, sp. nov.

(Figs 95–97, 161, 162)

Type specimens: Holotype ♂, China, Hebei: Yongnian (36°47'N, 114°30'E), 6.XI.1995, leg. Shuiqiang Li (MSCB). Paratypes (19 specimens): 6 ♂, 6 ♀, same data as holotype (MFNB, MSCB); 1 ♀, Shaanxi, 57 km W Xian (riverbank at Autoroute 100) (34°09'N, 108°20'E), 16.VIII.1995, leg. Schülke (MSCB); 2 ♀, Shaanxi, 57 km W Xian (riverbank at Autoroute 100) (34°09'N, 108°20'E), 16.VIII.1995, leg. Pütz (APCE); 1 ♀, Shaanxi, 7 km E Zouzhi (riverbank at Autoroute 100) (34°09'N, 108°17'E), 400 m, 24.VIII.1995, leg. Pütz (APCE); 1 ♀, Shaanxi, 100 km SW Xian at Autoroute km 63, S Zhouzhi (33°53'N, 108°00'E), 1.IX.1995, leg. Schülke (MSCB); 1 ♂, Shaanxi, 31 km E Xian, Lingtong: Li Shan (34°20'N, 109°16'E), 1000– 1200 m, 25.VIII.1995, leg. Schülke (MSCB); 1 ♂, Japan, Kyoto, 7./8.VIII.1980, leg. Besuchet (MHNG).

Description: Macrophthalmous, pterodimorphous species with palisade fringe of abdominal tergite VII; most type specimens micropterous with reduced elytra along suture about 0.8 times as long as pronotum and with non-functional metathoracic wings. Body color light brown to medium brown; appendages light brown. Body surface subnitid with very fine, dense, setose punctation. Head about 1.1–1.2 times longer than wide, with moderately convex temples and straight to feebly concave posterior margin. Eyes 0.41–0.47 times as long as temples. Nuchal groove 0.28–0.31 times as wide as greatest head width. Trichobothrial cavity guttiform, with tapered anterior end connected to dorsoposterior margin of eye. Antenna from slightly elongate antennomeres 2–3 or 2–4 gradually widened toward moderately transverse antennomere 10 about 0.8–0.9 times as long as wide; antennomere 11 about 1.3–1.4 times as long as wide. Total body length 2.1–2.6 mm; forebody length 1.1–1.3 mm.

Male: Protarsomeres 1–4 dilated, almost twice as wide as long.

Abdominal sternite VII in about median 0.25 of somewhat convex posterior margin with barely perceptible emargination and two submedial, adjacent groups of three short, thick macrosetae directed medioposteriorly and pointing toward each other (Fig. 161).

Abdominal sternite VIII with subbasal ridge evenly curved posteriorly and posterior margin triangularly incised to approximately 0.2 of sternite length; lateral setae long, up to 0.3 times as long as sternite length (Fig. 162).

Aedeagus with lobe-bearing apical portion occupying about 0.25 of aedeagal length (Fig. 95), in dorsal view long-oval, about 3.5 times as long as wide (Fig. 97); phallobase extended beyond base of ventral process, there slightly convex ventrally (Fig. 95) and straight laterally (Fig. 97). Apical lobes with few median, subapical setules (Figs 95, 97); each apical lobe from widely convex apex ventrally extended into hook-shaped lobe with proximad pointing tip (Fig. 95). Dorsal lobe in lateral view straight dorsally with thin, pointed tip (Fig. 95), in dorsal view subtriangular with truncate tip (Fig. 97). Ventral lobe absent. Ventromedial endophallic lobe long, weakly sclerotized, strongly curved distad and tapered toward subacute end, running between and considerably protruding beyond hooked, ventral extensions of apical lobes (Fig. 95). Endophallic sclerites large (Figs 95, 97). Ventral process aligned longitudinally, almost reaching tip of dorsal lobe, in lateral view straight, in basal half about 0.5 times as wide as aedeagus at same level, after that evenly tapered toward thin apical fifth (Fig. 95); ventral process in ventral view narrow lanceolate with subacute end, at narrow base about 0.3 times as wide as aedeagus at same level, at widest point 0.7 times as wide as aedeagus at same level (Fig. 96); proximal ends of ventral process lengthened to frame large, oval, ventral window almost reaching postforamen (Fig. 96). Dorsodistal opening of phallobase gradually narrowed toward dorsomidlongitudinal split occupying most of length of phallobase (Fig. 95, 97); latter therefore collapsed in dry specimens (Fig. 95). Postforamen moderately projecting distoventrad (Fig. 95). Circoforamen about twice as long as median foramen (Fig. 96). Length of aedeagus 0.31– 0.33 mm.

Female: Protarsomeres 1–4 dilated, almost twice as wide as long.

Distribution: Micranops orientasiaticus is distributed in the East Palearctic and recorded from China (Qin Mountains) and Japan (Honshu).

Bionomics: Micranops orientasiaticus is a riparian species, as it has been repeatedly sifted from phytodebris on riverbanks.

Remark: Micranops orientasiaticus is the only known species of the genus whose protarsomeres 1–4 are equally strongly dilated in both sexes.

Etymology: The epithet orientasiaticus [adjective, Latin (“the East Asian”), composed of the Latin adjective orientalis (eastern) and the Latin noun Asia (Asia)] refers to the East Asian distribution of this new species.