Xenorthrius robustus Corporaal, 1939

Gerstmeier, Roland & Eberle, Jonas, 2010, Revision of the Indo-Australian checkered beetle genus Xenorthrius Gorham, 1892 (Coleoptera: Cleridae, Clerinae) 2584, Zootaxa 2584 (1), pp. 1-121 : 75-77

Xenorthrius robustus Corporaal, 1939

( Figures 45 and 68D )

Xenorthrius robustus Corporaal 1939: 25 .

Specimens examined: Holotype: India: ex Acrocarpus fraxinifolius; R.R.D. 592, B.C. R. 99, Cage 794; Samsingh 1800, Kalimpong, Bengal. 7.VI.1934, Balwant Singh.; J.B. Corporaal: Type : Holotype: Xenorthrius robustus, 1939 Corp.; 364 (♀, ZMAN) .

Others: India: Chairy Cow , 26.VII.85 800m ; India, Darjeeling D., Ch. J. Rai ( NHMB) . Gurubathan , 350m, 15–19.V.1986 ; Indien, Darjeeling D., Bhakta B (1ex., NHMB, 1 ex., RGCM). Malli , 22.Vi.1987 ; Indien, Darjeeling D., Bhakta B. ( NHMB) . Sindepung , 23.IV.1987 ; Indien, Darjeeling D., Bhakta B. ( NHMB) . Sukhay Simana , 1600–2000m, 31.IV–11.V.86 ; India, Darjeeling D., Bhakta B. ( NHMB) . N-Indien, 6.7.1989, Uttar Pradash, Rishikesh, 23km Uttarkashi 1400m lg. Riedel ( RGCM) . NW-Indien, Kumaon, Bhiuxtal , 5.VIII.1974 leg. F. Smetacek ( RGCM) . China: China, N Hunan, 4.–7.VII.2003, Wuling Shan, 29.4 N 110.4 E, Zhangjiajie, - 700m, Jaroslav Turna leg ( RGCM) . Nepal: Godavari , 1500–1600m, 6.VII.1986; C- Nepal, Kathmandu V., C. Holzschuh ( NHMB) . Jiri-Shivalaya, ( Khimti Khola ), 2500– 1800m, 11–12.VI.1987; C-Nepal, Janakpur, C.J. Rai ( NHMB) . Nepal Kathmandu NW, Gorkhana, Bagmati River, Ufer 1350m, 15.06.2001 27°43’22”N, 85°22’59”E, leg. A. Kopetz HF/KL ( NMEG) . Sundarijal 1465m, 15–21.VI.83 ; Nepal Kathmandu v., M. Brancucci ( NHMB) . E-Nepal, Arun Valley, Khandbari (950m)- Bhotebas (1850m) 5.6.1992 leg. J. Probst ( RGCM) . Kali-G. Khola, Tatopani-Beni , 1100– 1000m, 29.VI.1986; W . Nepal Dhawalagiri, Myagdi, D. C. Holzschuh (1ex., NHMB, 1ex., RGCM). Landrung , 1400–1800m, 3–6.VI.1984; W-Nepal, Modi Khola, C.H. Rai ( NHMB) . Myagdi Distr., Tatopani , 1100–1400m, 27–28.VI.86; W . Nepal Dhawalagiri, C. Holzschuh (1ex., NHMB, 1ex., RGCM) . Nepal P: Seti /D Bajhang, way Talkot (N29°26’23”, E81°18’04”) to Chainpur (N29°33’04”, E81°11’44”), 1800– 1200m, 29.VI.2009, leg, A. Kopetz #38 ( NMEG) .

Measurements: (21 specimens measured) Average total length: 13.3mm, range: 11.2–17.1mm, average elytral length: 8.7mm, average elytral width: 3.6mm, average pronotal length: 3.5mm, average pronotal width: 2.8mm, average head width: 2.7mm.

Head: Red-brown to black, cranium vested with long setae, with relatively coarse punctation, interstices not exceeding one diameter of punctures; posterior part of clypeus red-brown, margins darkened, anterior margin emarginate centrally, posterior margin convex, with large punctation and a few long setae laterally, smooth centrally; ventral part red-brown, smooth except wrinkles behind the eyes; antennae red-brown, lighter then head capsule, A9 to A11 forming a distinct club, male antennae reaching base of pronotum when laid back, female antennae slightly shorter; gular sutures diverging apically, gular process narrow.

Thorax: Average pronotal length:width ratio 1.3:1; pronotum red-brown to black, anterior margin can be somewhat lighter, densely vested with yellow setae, pronotal arch with distinct punctation, interstices larger than diameter of punctures, lateral punctation denser, pronotum proper with coarse and dense punctation, punctation becoming sparser ventral of dorsolateral fovea; prosternum dark red-brown to black, smooth; mesosternum dark red-brown to black, margins darkened, vested with yellowish setae, elevated circular centrally; metasternum dark red-brown to black, vested with fine setae, with sparse and fine punctation; transverse sulcus on anterior part of mesosternum and mesepisternum more distinct on mesosternum; anterior metasternal process with two strongly sclerotized, ventrally projecting, edges; scutellum oval, grayish-brown.

Elytra: Average length:width ratio 2.4:1; uniformly grayish-brown, often very dark, anterior margin of punctures darkened, vested with shorter erect setae, punctation relatively large, striae 1 obsolete after one third, striae 2 and 3 obsolete behind middle, striae 4, 7, 8 and 9 longer but not reaching apex, striae 5 and 6 merging before apex, striae 10 short, visible as furrow under humeral angle, mostly not reaching middle of elytra, diameter of punctures smaller than interstices, can be equal or larger in humeral region, punctation often rasp-like in humeral region, interstices smooth, carination absent.

Legs: Yellow, tarsi slightly darker, tarsal pulvilli pale; metatibiae more or less straight, tibial carination present on anterior and posterior face of each tibia but only in basal half, carination red-brown.

Abdomen: Ventrites red-brown, with sparse and fine punctation; male pygidium ovate, posterior margin concave, round apically; female ventrite 5 with small but deep U-shaped emargination; male ventrite 6 with broad U-shaped emargination apically. Male genitalia ( Fig. 45 ): Phallobasic apodeme broad, ventral sclerotization folding laterally; phallus only slightly asymmetric, phallic struts broad; spicular fork dividing into two branches after one quarter of length.

Distribution: India, China (Hunan), Nepal.

Seasonal occurrence: Collected from April to August.

Figures

FIGURE 45. Xenorthrius robustus: (A) Tegmen in ventral view, (B) phallus in ventral view, (C) tip of aedeagus in lateral view, (D) spicular fork, (E) male pygidium, (F) male ventrite 6 and distribution map.

FIGURE 68. Habitus photographs: Xenorthrius penangis n. sp. (A), Xenorthrius procerus (B), Xenorthrius prolongatus (C), Xenorthrius robustus (D), Xenorthrius rubicollis n. sp. (E) and Xenorthrius rubris n. sp. (F). Scale bars = 4mm.