Xenorthrius hoerrmanni Gerstmeier & Eberle, 2010

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 : 47-50

Xenorthrius hoerrmanni Gerstmeier & Eberle, 2010 n. sp.

( Figures 31 and 66A )

Specimens examined: Holotype: Laos: Ban Saleuy , alt 1337m, N20°13.327; E103°59.355, Houa Phan, Laos, 30 IV 2003, leg. Maruyama, K. (♂, RGCM).

Paratypes: Myanmar, Kachin Prov., Sikaw , 2.– 14.6.2009, local collectors (4ex., RGCM, 1ex., KSCT) . China, S-Yunnan, vic. Bangzhang , 45km SW Jinghong, N21°44'37 / E100°27'02, 1600 –1700m, 4.5.2009, leg. A. Weigel ( RGCM) .

Measurements: (7 specimens measured) Total length: 9.6mm, elytral length: 6.6mm, elytral width: 2.7mm, pronotal length: 2.3mm, pronotal width: 2.0mm, head width: 1.9mm.

Head: Black; cranium vested with long setae, punctation weak but distinct, interstices minimal one diameter of punctures; posterior part of clypeus black, anterior margin concave, posterior margin convex, few long setae, punctation large but sparse; ventral part red-brown to black, smooth, except wrinkles behind the eyes; antennae red-brown, antennomeres gradually decreasing in length from A3 towards A8, A9 to A11 forming a distinct club, antennae not reaching base of pronotum when laid back; gular sutures diverging apically, gular process narrow, dilated terminally.

Thorax: Average pronotal length:width ratio 1.1:1; pronotum black, densely vested with yellow setae, pronotal arch broad, punctation fine, interstices larger than diameter of punctures, pronotum proper with coarse and dense punctation, punctation large, interstices smaller than diameter of punctures, punctation sometimes merging to longitudinal wrinkles; transverse sulcus on anterior part of mesosternum and mesepisternum distinct on mesosternum; prosternum red-brown, smooth; mesosternum red-brown, margins darkened, vested with yellowish setae; metasternum red-brown, vested with fine setae, punctation sparse and fine; anterior metasternal process with two strongly sclerotized, ventrally projecting, edges; scutellum oval, dark red-brown.

Elytra: Average length:width ratio 2.4:1; basal third red, followed by a yellow fascia, postmedian fascia broad, black, near apex another yellow fascia, but elytral suture here black, extreme apex black, subcutaneous structures visible through yellow areas, vested with relatively short decumbent setae, punctation relatively small, striae 1 to 3 obsolete with beginning of yellow fascia, striae 4 reaches black postmedian fascia, striae 5 to 7 crossing postmedian fascia, striae 8 shorter but also reaching postmedian fascia, striae 9 with weak punctation, striae 10 hardly visible, interstices between striae about one half diameter of punctures, interstices within striae smaller; punctation only slightly rasp-like in humeral region, slightly carinated next to striae 4 to 6 in postmedian fascia.

Legs: Red-brown, coxa, trochanter and proximal part of femora yellow, tarsal pulvilli pale; metatibiae slightly bent distally, anterior and posterior face of each tibia carinate, carination dark red-brown, distinct, especially on metatibia.

Abdomen: Ventrites dark red-brown to black, punctation sparse and fine; male pygidium broadest basally, lateral margins converging apically, apical margin is flattened; male ventrite 6 with distinct U-shaped emargination. Male genitalia ( Fig. 31 ): Lateral margins of tegmen parallel, sinus broadly V-shaped; phallic plates broad; spicular fork dividing into two branches after quarter of length.

Distribution: Laos.

Seasonal occurrence: Collected at the end of April.

Etymology: This species is dedicated to Gertrud Hörrmann, Christine Hörrmann-Roggenstein and Kathrin Hörrmann-Eberle, the female members of the junior author’s family, who financed the university education of Jonas Eberle.

Figures

FIGURE 31. Xenorthrius hoerrmanni: (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 66. Habitus photographs: Xenorthrius hoerrmanni n. sp. (A), Xenorthrius incarinipes (B), Xenorthrius lanatus n. sp. (C), Xenorthrius lineatipes (D), Xenorthrius loricus n. sp. (E) and Xenorthrius lugubris n. sp. (F). Scale bars = 4mm.