Nebria (Sadonebria) hakusana Sasakawa, 2022

Sasakawa, K., 2022, A new species of the East Asian endemic subgenus Sadonebria Ledoux et Roux (Coleoptera: Carabidae: Nebria) ground beetles from Japan, Russian Entomological Journal 31 (1), pp. 10-14 : 11-13

Nebria (Sadonebria) hakusana Sasakawa , sp.n.

Figs 2–7.

TYPE MATERIALS: Holotype, ♂ (KS), Shinmata Pass , Nomuki , Katsuyama , Fukui Prefecture, Japan, 1.vi.2020, S. Inoue leg.; paratypes, 1♂ (KS), Mt. Sanpôkuzure, ca 1,200 m, Shirakawa City, Gifu Prefecture, Japan, 23–24.vi.2005, H.Ikeda leg.; 1♂ 2♀♀ (EUM), “KAGA-Hakusan Nakahanba ~ Bettonozoki (1,500~ 1,750 m) 1 VIII. 1973 M. Miyatake ” [Nakahanba (1,500 m) ~ Bettonozoki (1,500 m), Mt. Hakusan , Shiramine, Hakusan, Ishikawa Prefecture, Japan].

DESCRIPTION. External characters ( Figs 2–3). Body length (including mandibles): ♂, 12.5–13.6 mm; ♀, 12.6– 12.8 mm. PL / PW: 0.73–0.76; PAW/ PW: 0.73–0.76; PPW/ PW: 0.64–0.68. EL/EW: 1.59–1.71. Habitus slender. Hind wings atrophied. Dorsal surface shiny and almost black; head with a dark-brown patch between eyes; pronotal and elytral margins dark-brown; mouth appendages and antennae reddish to dark brown; legs dark brown except for femora, which are blackish brown. Pronotum cordate and convex; lateral margins reflexed throughout; hind angle acute; laterobasal impression large and deep; median line distinct in the middle, absent near the anterior margin, rudimentary near the posterior margin; surface of central part and near the anterior margin almost smooth; surface near the posterior margins very sparsely punctate; surface of the lateral margins very sparsely punctate and/or shallowly, transversely wrinkled; two marginal setae on each lateral side, anterior setae near the widest pronotal point, and posterior setae near hind angles. Elytra oblong, widest behind the middle; 7–10 setigerous pores on interval 3. Abdominal sterna 4–7 usually with a pair of setae, but in the male from Mt. Sanpôkuzure, additional setae on left side of sternum 4 and on both sides of sternum 7.

Male genitalia ( Figs 4–6). Aedeagus slender and strongly bent at apical 2/5; ventral contour of subapical part from lateral view arcuate ventrally; apex simple and widely rounded.Endophallus straight, elongate, directed posterodorsally; laterobasal lobes large, hemispherical; lateroapical lobes absent; dorsobasal lobe bifid from lateral view, with the subapex of basal one smaller than that of apical one; dorsoapical lobe widely swollen, and smaller than the laterobasal and dorsobasal lobes; ventroapical lobe barely swollen. Both right and left parameres spatulate, with the former larger than the latter.

DIAGNOSIS. Distinguished from N. quinquelobata Sasakawa, 2016 , N. kiso , and N. mikawa , which are relatively closely distributed ( Fig. 1 ), by the following characters: from N. quinquelobata by dark brown legs [versus yellowish brown legs in N. quinquelobata ; Sasakawa, 2016], and from N. kiso and N. mikawa by less cordate and less punctate pronotum ( Figs 7–9).

ETYMOLOGY. Named after the Hakusan Mountains, where the type materials were collected.

Figures

Fig. 1. Distribution of Nebria (Sadonebria) spp. in the Japanese Archipelago, compiled from Sasakawa [2016] and Sasakawa and Itô [2019]; N. chinensis Bates, which is distantly related to the remaining taxa, and samples that are not identified by genital morphology are not included. The numbers indicate: 1 — N. sadona Bates; 2 — N. saeviens Bates; 3 — N. asahina Sasakawa; 4 — N. nasuensis Sasakawa; 5 — N. leechi Bates; 6 — N. quinquelobata Sasakawa; 7 — N. chichibuensis Sasakawa; 8 — N. yatsugatakensis Sasakawa, 9 — N. kiso Sasakawa; 10 — N. mikawa Sasakawa; 11 — N. hakusana Sasakawa sp.n.; 12 — N. ohdaiensis Nakane, 13; N — tenuicaulis Sasakawa and Kubota; 14 — N. jakuchisana Sasakawa; 15 — N. shikokuensis Sasakawa; 16 — N. trifida Sasakawa. Red letters denote the type localities of each species. Рис. 1. Распространение видов Nebria (Sadonebria) на Японском архипелаге, по данным иЗ Sasakawa [2016] и Sasakawa, Itô [2019]; находки N. chinensis Bates, который слабо свЯЗан с остальными таксонами, и ЭкЗемплЯры, которые не идентифицируютсЯ по морфологии гениталий, не покаЗаны. Цифры соотвествуют: 1 — N. sadona Bates; 2 — N. saeviens Bates; 3 — N. asahina Sasakawa; 4 — N. nasuensis Sasakawa; 5 — N. leechi Bates; 6 — N. quinquelobata Sasakawa; 7 — N. chichibuensis Sasakawa; 8 — N. yatsugatakensis Sasakawa, 9 — N. kiso Sasakawa; 10 — N. mikawa Sasakawa; 11 — N. hakusana Sasakawa sp.n.; 12 — N. ohdaiensis Nakane, 13; N — tenuicaulis Sasakawa and Kubota; 14 — N. jakuchisana Sasakawa; 15 — N. shikokuensis Sasakawa; 16 — N. trifida Sasakawa. Красные цифры обоЗначают типовые местонахождениЯ длЯ каждого вида.