Quedius

Zhao, Zong-Yi & Zhou, Hong-Zhang, 2015, Phylogeny and taxonomic revision of the subgenus Velleius Leach (Coleoptera: Staphylinidae: Staphylininae), Zootaxa 3957 (3), pp. 251-276 : 270-271

7. Quedius (Ve l le iu s) japonicus ( Watanabe 1990)

( Figs. 4 B & 11).

Watanabe 1990: 67 (originally in Velleius ; Type locality: Japan: Honshu: Tokyo Pref.: Higashimurayama).

Redescription. Body length about 12.5 mm, body width 3.1 mm (EW), HW/PW/EW/AW = 1.0:1.3:1.5:1.3, HL/ PL/EL = 1.0:1.5:1.9.

Head black, other parts dark brown including antennae and legs, hypomera of elytra from humeri to apices yellowish.

Head nearly quadrate, wider than long, HW/HL = 1.0:0.8, eyes large, in dorsal view longer than tempora, HEL/HTL = 1.0:0.5; posterior frontal setiferous puncture positioned before posterior edge of eye and with fovea adjacent to eye, two basal setiferous puncture on each side with the outer one much smaller than the inner one and both very close to nuchal constriction, temporal setiferous puncture about equally distant to posterior side of eye and to nuchal constriction; no oblique fovea behind insertion of each antenna, dorsal surface covered with sparse fine punctures and dense microsculpture, meshes of microsculpture isodiametric on anterior portion but gradually becoming transverse on posterior portion of head.

Antennae with apex of segment III obviously wider than apex of segment I, segment IV and X each moderately, segments V–IX each deeply bifurcated, segment III longer than segment II, last segment about as long as 2 preceding segments combined.

Left mandible ( Fig. 11 D) with anterior tooth not divided into subtooth, edge before anterior tooth smoothly curved, posterior tooth present with notch before it very deep, right mandible ( Fig. 11 E) with only one teeth.

Maxillary palpus with last segment lacking seta and nearly fusiform, outer surface of basal half covered with many longitudinal foveae and surface of apical half covered with many fine pores, ratio of segments II–IV 1.0:0.7:1.0.

Labial palpus with last segment lacking seta and strongly dilated to globose, apical portion covered with many pores, apex with sensory organ well developed, segment II with apex much wider than base, ratio of segments I–III 1.0:0.8:1.7.

Neck surface covered with microsculpture consisting of transverse meshes.

Pronotum wider than long, PW/PL=1.0:0.8; one setiferous punctures in each dorsal row and far from anterior side, two large setiferous punctures in each sublateral row with the anterior one before and posterior one after level of puncture in dorsal row, large lateral setiferous puncture at about same level of puncture in dorsal row; surface covered with very vague and hardly appreciable but dense transverse microsculpture.

Scutellum densely setose, surface between setae covered with dense transverse microsculpture, anterior basal ridge with middle portion angled backward and broken, posterior basal ridge slightly curved forward ( Fig. 4 B).

Elytra slightly wider than long, EW/EL = 1.0:0.9, EL/ESL = 1.0:0.6, surface evenly and densely setose, surface between setae smooth and without micropuncture.

Abdomen with each tergite densely setose and only slightly sparser at each apical margin, tergites III–IV lacking and tergites V–VII bearing large middle lateral setae, tergite VII bearing whitish apical fringe, tergite VIII bearing many large black setae on apical half.

Apices of meso- and metatarsomere V not dilated.

Male. Aedeagus in lateral view ( Fig. 11 A) with apex of paramere not protruding beyond apical hook of median lobe, the former bent towards median lobe, paramere not suddenly widened below apex, median lobe with apex hooked towards paramere and concaved below the hook, in dorsal view ( Fig. 11 B) paramere narrower than median lobe through whole length, paramere from apex to base first widened and then narrowed, median lobe from apex to base nearly parallel-sided, apical portion of paramere ( Fig. 11 C) not divided into two branches but just with a small emargination at apical margin, 2 apical and 2 lateral setae on each side, sensory peg setae on underside of paramere forming one irregular apical group consisting of 17 setae and extending from apex downwards slightly basal to insertions of lateral setae.

Female. Unknown at present.

Type material. Holotype, male, Japan, Honshu, Tokyo Prefecture, 23.VI.1965, collected by N. Minagawa, deposited in LETUA.

Comparison. The differences between Quedius (Velleius) japonicus and the two new species were mentioned above.

Distribution. Quedius (Vell eius) japonicus is at present known only from its type locality in Japan.

Figures

FIGURE 4. Some structures of Velleius. A – B, antenna. (A) Q. (V.) dilatatus, (B) Q. (V.) rectilatus. C – D, head in dorsal view. (C) Q. (V.) dilatatus, (D) Q. (V.) rectilatus, AFSP = anterior frontal setiferous puncture, PFSP = posterior frontal setiferous puncture, (E) pronotum of Q. (V.) dilatatus, DR = dorsal row, SLR = sublateral row (Q. (V.) dilatatus without the posterior puncture), LLSP = large lateral setiferous puncture, (F) elytra of Q. (V.) rectilatus. G – I, scutellum. (G) Q. (V.) dilatatus, (H) Q. (V.) japonicus, (I) Q. (V.) sagittalis, abr = anterior basal ridge, pbr = posterior basal ridge, (J) abdominal tergite V of Q. (V.) dilatatus, LMLS = large middle lateral seta, (K) male abdominal tergite VIII of Q. (V.) elongatus, showing all large setae but not small ordinary ones, (L) male abdominal sternite VIII of Q. (V.) elongatus, showing all large setae and the glabrous area in front of apical emargination. Scales = 0.5 mm.

FIGURE 11. Q. (V.) japonicus. A – C, aedeagus, (A) lateral view, (B) dorsal view, (C) underside of paramere, showing sensory peg setae; D – E, mandibles, dorsal view. Scales = 0.5 mm.