Xenorthrius guerlachi Pic, 1951

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 : 46-47

Xenorthrius guerlachi Pic, 1951

( Figures 30 and 65F )

Xenorthrius guerlachi Pic 1951: 11 .

Specimens examined: Holotype: Vietnam: Cochinch. Or., Reu-Hai, R.P. Guerlach, 1900; 32; Guerlachi n sp; Xenorthrius guerlachi n sp; Museum Paris, Coll. M. Pic (♀, MNHN).

Wrongly determined syntype of X. mouhoti: Bhamò , Birmania, Fea, IV 1886; Typus; Xenorthrius mouhoti . Gorh., ♀! - Type; Xenorthrius mouhoti, Gorham, 1892 ; Museo Civico di Genova (♀, MSNG).

Others: Vietnam: Museum Paris, Cochinchine, Mont. de Chaudoc , Harmand , 1877; 423; 508; Xenorthrius mouhoti, Gorh. ; Schenkling Vid., 1901 ( MNHN) . Museum Paris, Tonkin, Env. d’Hanoi , (Demange), A. Grouvelle, 1909 ( MNHN) . Vietnam, Lai Chau Prov., A Pa Chai 16.- 25.4.2007, leg. Li Jingke ( RGCM) . Cochinchine, Cap St. Jaques; Museum Paris, E. le Moult 1916 ( MNHN) . China, Yunnan : China, S- Yunnan, Xishuangbanna, 23km NW Jinghong, Na Ban Village , NNNR, 22° 10.04N, 100° 39.52E, leg, A. Weigel, 680m, 20.V.2008, LF ( MNHE) . India: Bengalen; Schenkling det.; coll. DEI, Müncheberg ( SDEI) . Indes; Museum Paris , Coll. M. Pic ( MNHN) . K.M. Brüssel, Bengale ; Schenkling det.; coll. DEI, Müncheberg ( SDEI) . Samanahally, près Bangalore , R P Tabourel, IV.–V.1899; Museum Paris, ex Coll., R. Oberthur (2ex., MNHN) . Barway , Inde, R.P. Cardon ; J.B. Corporaal det., (Dahleng 1922), Xenorthrius mouhoti Gorh. ; Museum Paris, Coll. M. Pic ( MNHN) . Barway, P. Cardon ; coll. DEI, Müncheberg ( SDEI) . Barway, P. Cardon ; Determin. S. Schenkling (2ex., ISNB) . Barway, P. Cardon ; Determin. S. Schenkling, Xenorthrius Mouhoti Gorh. ; ( ISNB) . Barway, P. Cardon ; Schenkling det.; coll. DEI, Müncheberg ( SDEI) . Museum Paris, Bengale, Mandar, S. Schenkling – 1902; Mantar, Bengal; Xenorthrius mouhoti Gorh. ; Schenkling Vid:, 1901 ( MNHN) . Mandhar ( Beng. ), P. Cardon 7/91, Det. 92; Xenorthrius mouhoti, Gorh. (ZMHB) . Nepal: E-Nepal, Arun Valley, Bhotebas (1850m) - Cichila (2050m) 6.6.1992 leg. J. Probst ( RGCM) . E-Nepal, Arun Valley, Hongmaya – Surtibari , 400m 1.6.1992, leg. J. Probst ( RGCM) . Phalicot , 13. VI. 83 550m; E-Nepal, Arun V., M. Brancucci ( NHMB) . Thailand: Phu Chong-Na Yoi N.P., Ubon Ratchathani-Prov. , CE-Thailand, 10. V 2008, Shigeo Tsuyuki leg ( KSCT) . NE Thailand, 19.– 22.4.1991, Chiang Mai prov., Doi Suthep, S. Bily leg ( NMPC) . NW Thailand, 1–15.1991, Mae Hong Son, Ban Huai Po , 1600m S. Bily leg (1ex., 3ex. 17.5.1992, 1ex. 9.-16-5-1992, 5ex. 8.– 17.5.1992, NMPC) . NW Thailand 8–18.V.1992, Mae Hong Son, Ban Huai Po, 1600–2000m, J.Horák leg (1ex., 1ex. 30.4.– 4.5.1991, NMPC) . NW Thailand 9.– 16.V.1991, Mae Hong Son, Ban Huai Po 1600m, leg. P. Pacholatko ( RGCM) . Thailand, Chiangmai , Doi Pui, 14.5.85 ( RGCM) . Thailand, Mae Hong Son, 26.– 27.4.2003, R. Grimm ( RGCM) . Thailand, N. Mae Hong Son prov., Soppong envir., 600m, 28.5.– 2.6.1999, leg. M. Riha ( RGCM) . Thailand, Nan-Pha Khab , 11.– 15.5.1993 Pacholatko & Dembicky (4ex., RGCM) . Thailand, Soppong Pai 1.– 8.5.1993 Pacholatko & Dembicky leg (3ex., RGCM) . Coll. I.R.Sc.N.B., Thailande (Loei), Na haeo (bio station), 05–12.V.2001, Secondary forest, Leg. Constant & Grootaert ( ISNB) . Thailand, 19.5.1993, Lom Sak - Dan Sai, leg. Pacholatko &, Dembicky (2ex., RGCM) . Thailand, Namuang 21.– 26.5.1993 Pacholatko &, Dembicky leg ( RGCM) . Siam; Ex Musaeo, H.W. Bates , 1892; Museum Paris, ex Coll., R. Oberthur ( MNHN) . Laos: Laos, Umgeb. Vientiane; III–IV. 1963 ( RGCM) . Laos 1963, Umgeb. Paksé (2ex., ZSM) .

Measurements: (56 specimens measured) Average total length: 9.5mm, range: 8.4–11.0mm, average elytral length: 6.3mm, average elytral width: 3.1mm, average pronotal length: 2.9mm, average pronotal width: 2.5mm, average head width: 2.3mm.

Head: Red-brown, cranium densely vested with yellowish setae, with strong punctation, interstices often smaller than diameter of punctures; posterior part of clypeus dark red-brown, margins darkened, with large punctation and a few long setae laterally, smooth centrally; ventral part smooth, except wrinkles behind the eyes; antennae red-brown, A9 to A11 forming a distinct club, antenne reaching middle of pronotum when laid back; gular sutures diverging apically, gular process narrow.

Thorax: Average pronotal length:width ratio 1.2:1; pronotum red-brown, anterior margin darkened, vested with yellowish setae, pronotal arch with distinct and sparse punctation, pronotum proper with coarse and dense punctation, interstices smaller than diameter of punctures; prosternum red-brown, smooth; mesosternum red-brown, margins darkened, vested with yellowish setae; metasternum dark-brown to black, vested with fine setae, punctation sparse; anterior metasternal process with two strongly sclerotized, ventrally projecting, edges; scutellum circular but flattened anteriorly, red-brown.

Elytra: Average length:width ratio 2.0:1; basal quarter dark-brown with a color gradient to black to the apex, humeral region and humeral angle sometimes yellowish, yellow central fascia, extending from lateral to sutural margins, 5 to 8 punctures in length, expanded in middle, anterior along the suture, posterior with two to three extensions, remainder red-brown, darker next to central fascia, two yellowish spots near apex, rectangular subcutaneous structures visible through yellow areas, densely vested with short decumbent and longer erect setae, punctation relatively large, with additional punctures between striae 1 and 2 in humeral region, striae 1 obsolete after dark basal part, other striae covering entire surface but weaker after postmedian fascia, diameter of punctures larger than interstices between and within striae; punctation rasp-like in humeral region, especially carinated laterally next to striae.

Legs: Yellow, tarsi brown, tarsal pulvilli pale; tibia basally slightly darkened, metatibiae more or less straight, anterior and posterior face of each tibia carinate, carination red-brown, distinct, especially on metatibia.

Abdomen: Ventrites red-brown, lighter towards apex, with distinct punctation, interstices larger than diameter of punctures; anterior margin of male pygidium flattened, with a darker brown spot centrally, arms short; male ventrite 6 narrow, with distinct U-shaped emargination. Male genitalia ( Fig. 30 ): Lateral margins of tegmen converging; phallic plates relatively narrow, tip strongly sclerotized with horizontal furrow; spicular fork dividing into two branches after one quarter of length.

Distribution: Vietnam, China (Yunnan), India, Nepal, Thailand, Laos.

Seasonal occurrence: Collected from March to June.

Figures

FIGURE 30. Xenorthrius guerlachi: (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 65. Habitus photographs: Xenorthrius dorsalis (A), Xenorthrius elongatus (B), Xenorthrius ephippiatus (C), Xenorthrius furcalis n. sp. (D), Xenorthrius geniculatus (E) and Xenorthrius guerlachi (F). Scale bars = 4mm.