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 : 271-273

8. Quedius (Ve l le iu s) pectinatus ( Sharp 1874)

( Fig. 12 ).

Sharp 1874: 24 (originally in Velleius ; Type locality: Japan: Hiogo; Nagasaki); Gridelli 1932: 18; Nakane 1963: 94; Naomi 1986: 244; Smetana 1995: 110; Watanabe 1990: 63; Cho 1996: 114; Herman 2001: 3307 (complete list of references). Synonymy: Velleius simillimus Fairmaire 1891 : cxci; Herman 2001: 3307 (complete list of references). syn. nov..

Redescription. Body length about 20.0 mm, body width 5.0 mm (EW), HW/PW/EW/AW = 1.0:1.5: 1.6:1.4, HL/ PL/EL = 1.0:1.5:1.9.

Head dark brown, pronotum and elytra reddish-brown, abdomen dark brown, antennae and all legs dark brown, maxillary and labial palpi with all segments reddish-brown and apices paler.

Head nearly round, wider than long, HW/HL = 1.0:0.8, eyes large and longer than tempora in dorsal view, HEL/HTL = 1.0:0.5; posterior frontal setiferous puncture positioned at the same level of posterior edge of eye and less than one diameter separated from posteromedial edge of eye, one basal setiferous puncture on each side and smaller than posterior frontal setiferous puncture, temporal setiferous puncture slightly closer to eye than to nuchal constriction; no oblique fovea behind insertion of antenna, dorsal surface covered with sparse fine punctures and very dense microsculpture consisting of isodiametric meshes.

Antennae with apex of segment III wider than that of segment I, segment IV–XI each deeply bifurcated, segment III longer than segment II, last segment longer than 3 preceding segments combined.

Left mandible ( Fig. 12 D) with anterior tooth divided into two subteeth with posterior one larger, edge before anterior tooth smoothly curved, posterior tooth absent, right mandible ( Fig. 12 E) with two teeth.

Maxillary palpus with last segment lacking setae and nearly parallel-sided, surface covered with longitudinal narrow foveae on basal portion and many pores on apical portion, ratio of length of segments II–IV 1.0:0.9:1.0.

Labial palpus with last segment lacking setae and fusiform, surface covered with many pores, ratio of length of segments I–III 1.0:1.2:1.2.

Neck surface covered with dense microsculpture consisting of meshes more transverse than those on head.

Pronotum wider than long, PW/PL = 1.0:0.8; two setiferous punctures in each dorsal row with anterior puncture much smaller than posterior one, sometimes a small puncture accompanying the posterior puncture, one setiferous puncture in each sublateral row, large lateral setiferous puncture behind sublateral row but before posterior puncture in dorsal row; dorsal surface covered with dense and vague transverse microsculpture.

Scutellum setose on apical half, surface covered with dense but shallow transverse microsculpture, anterior basal ridge with middle portion nearly straight, posterior basal ridge slightly arced backward.

Elytra. EW/EL = 1.0:0.9, EL/ESL = 1.0:0.5, evenly and more densely setose than scutellum, lateral face and posterior margin bearing many large black setae.

Abdomen with each tergite evenly and densely setose, tergite III–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 dilated.

Male. Sternite VIII with a middle emargination on apical margin, a small hairless area before it; sternite IX ( Fig. 12 F) with basal portion very narrow and long, apical portion with a small middle emargination on apical margin, surface from widest portion to apex covered with dense setae gradually becoming longer backwards; tergite X ( Fig. 12 G) with basal edge smoothly and broadly arcuated backwards, apical portion triangle-shaped but with apex truncated, surface of about apical 1/3 covered with many long setae; aedeagus in lateral view ( Fig. 12 A) with apex of paramere protruding slightly beyond apex of median lobe, paramere gradually becoming wider from apex to base, not suddenly widened below apex, median lobe concaved below apex on side facing paramere, in dorsal view ( Fig. 12 B) paramere gradually becoming wider from apex to base and narrower than median lobe for most length, apex of median lobe obtuse, apex of paramere ( Fig. 12 C) split in to two branches by a middle suture but the two branches still adjacent to each other, 2 long apical and 2 smaller lateral setae on each side, underside of paramere covered with many sensory peg setae forming two longitudinal groups extending from apex towards base beyond insertions of lateral setae.

Female. Tergite X ( Fig. 12 H) with basal side broadly and smoothly arcuated backwards, apical portion trilobed with two lateral lobes smaller than the middle lobe, apical portion of middle lobe triangle-shaped but with apex truncated, apical margin bearing a row of long setae, several smaller setae before them.

Type materials. Holotype, male, Japan, collected by G. Lewis, deposited in NHM. Syntypes, 2 males, with labels “Kiukiang, May 1887, A. E. Pratt” / “ Syntype ” / “Coll. et det. A. Fauvel, Velleius simillimus, Fairm., R. I. Sc. N. B. 17.479” / “Coll. et. det A. Fauvel, Velleius pectinatus, Sharp., R. I. Sc. N. B. 17.479”; 1 male, with label “Kiukiang, May 1887, A. E. Pratt” / “ simllimus Fairm. typus ” / “ Corée, v. Heyden”/ “ Syntype ” / “Coll. et. det A. Fauvel, Velleius pectinatus, Sharp., R. I. Sc. N. B. 17.479”.

Additional specimens examined. 1 male, China, Shanghai, 1.VI.1930, collected by A. Savio; 5 male, 1 female, China, Shanghai, 15–18.VI.1934, collected by O. Piel; 1 female, China, Haiyen, 17.VI.1935; 1 female, China, Emei Mountain, 29.VI.1955, collected by Huangjin; 1 male, 2 female, China, Mokan Shan, 9–11.VI.1937, collected by O. Piel; 1 female, China, Henan Province, Shangcheng, Suxianhe, Donghe village (31.74098°N / 115.55499°E), 504m, 25.VI.2006, collected by Liu Ye & Liang Hongbin, all specimens deposited in IZ-CAS.

Comparison. Quedius (Vel leius) pectinatus is similar to other large-sized Velleius species, but it can be easily recognized by deeply bifurcated antennal segments IV–X and the elongate last segment which is longer than preceding three segments combined.

Distribution. Quedius (Velleius) pectinatus is distributed in East Asia including China (Shanghai, Jiangxi, Zhejiang, Henan, Sichuan), Korea and Japan.

Figures

FIGURE 12. Q. (V.) pectinatus. A – C, aedeagus, (A) lateral view, (B) dorsal view, (C) underside of paramere, showing sensory peg setae; D – E, mandibles, dorsal view; F, male abdominal sternite IX; G, male abdominal tergite X; H, female abdominal tergite X. Scales = 0.5 mm.