Xenorthrius ephippiatus Gorham, 1893

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 : 39-42

Xenorthrius ephippiatus Gorham, 1893

( Figures 4B , 27 and 65C )

Xenorthrius ephippiatus Gorham 1893: 575 .

Xenorthrius bifasciatus Pic 1926a: 22 n. syn. Specimens examined: Holotype: India: 61213; Doherty; Type; Type ; Assam, Patkai ; Fry Coll., 1905. 100.; Xenorthrius ephippiatus G.; Xenorthrius ephippiatus Gorh , Assam Typus (♀, BMNH).

Paratype: India: Doherty; Assam, Patkai M; Type; Fry Coll. 1905. 100.; Type: Paratype, Xenorthrius ephippiatus Gorh. ; Xenorthrius ephippiatus , Paratypus Gorh., det. K.G. Blair (♂, ZMAN).

Holotype ( X. bifasciatus ): Vietnam: Lactho, Tonkin, de Cooman; Clerini; Type; Type; Xenorthrius bifasciatus n sp; Museum Paris, Coll. M. Pic (♂, MNHN); Xenorthrius bifasciatus n.syn.

Paratype ( X. bifasciatus ): Vietnam: Paratype; Hoa Binh; Tonkin; Cotype; Xenorthrius bifasciatus Pic (BMNH) Xenorthrius bifasciatus n. syn.

Others: Vietnam: 013; Hoah Binh ; Museum Paris, Coll. M. Pic ( MNHN) . 6.1907, Tonkin, Pho Vi ; ex Bouquet; Museum Paris, Coll. M. Pic ( MNHN) . Hoah Binh, Tonkin; Museum Paris , Coll. M. Pic (2ex., MNHN) . Hoah Binh, Tonkin; Pic det.; Xenorthrius bifasciatus, Pic, M. Pic rev., 1933; Coll DEI, Müncheberg ( SDEI) . Hoah Binh ; Museum Paris, Coll. M. Pic ( MNHN) . Lactho, Tonkin de Cooman; Museum Paris , Coll. M. Pic ( MNHN) . N-Vietnam, Tonkin, Cuc-Phuang NP 2.- 12.5.1991 leg. E. Jendek (2ex., RGCM) . Tonkin, Backan, Lemée, 1908.; Museum Paris, ex Coll., R. Oberthur ( MNHN) . Tonkin, Lactho ; Xenorthrius bifaciatus Pic; Museum Paris, Coll. M. Pic ( MNHN) . India: Madura Distrikt, Vorderindien, A. Kircheldorff; Pic det.; Xenorthrius bifasciatus Pic ; Coll DEI, Müncheberg ( SDEI) .

Measurements: (16 specimens measured) Average total length: 8.3mm, range: 7.2–9.5mm, average elytral length: 5.4mm, average elytral width: 2.5mm, average pronotal length: 2.4mm, average pronotal width: 2.0mm, average head width: 1.9mm.

Head: Red-brown, cranium densely vested with long and short setae, punctation distinct, interstices about one diameter of punctures; posterior part of clypeus red-brown, with large punctation and a few long setae laterally, smooth centrally; ventral part smooth, except wrinkles behind the eyes; antennae red-brown, antennomeres gradually decreasing in length from A3 towards A8, A9 to A11 forming an indistinct club, antennae 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, vested with yellowish setae, pronotal arch with distinct punctation, interstices about one diameter of punctures, pronotum proper with coarse and dense punctation, punctures large, interstices smaller than diameter of punctures; prosternum yellow, smooth; mesosternum light red-brown to red-brown, vested with yellow setae; metasternum redbrown, vested with fine yellowish setae, with sparse punctation; anterior metasternal process with two strongly sclerotized, ventrally projecting, edges; scutellum oval, colored like surrounding elytra.

Elytra: Average length:width ratio 2.1:1; basal quarter red-brown followed by a yellow fascia, postmedian fascia red-brown, relatively broad, apex yellow, subcutaneous structures visible through yellow areas, vested with short decumbent and longer erect setae, punctation relatively large, striae 1 to 3 obsolete with beginning of yellow fascia, striae 4 to 6 crossing postmedian red-brown fascia, striae 7 and 8 weaker, striae 9 and 10 hardly visible, interstices between striae equal diameter of punctures, interstices in striae smaller than diameter of punctures; punctation not rasp-like, slightly carinated next to striae 4 to 6 in postmedian fascia.

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

Abdomen: Ventrites red-brown, with distinct punctation, interstices larger than diameter of punctures; male pygidium basally very broad, lateral margins strongly converging; male ventrite 6 with distinct U-shaped emargination. Male genitalia ( Fig. 27 ): Tegmen widened apically, sinus in a V-shape; phallic plates extreme narrow, tip broader and strongly sclerotized with horizontal furrow; spicular fork dividing into two branches after one fifth of length.

Distribution: India, Vietnam.

Seasonal occurrence: Collected in May and June.

Figures

FIGURE 4. Pronota: (A) Xenorthrius truncatus, (B) Xenorthrius ephippiatus and (C) Xenorthrius decoratus.

FIGURE 27. Xenorthrius ephippiatus: (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.