Xenorthrius simplex Schenkling, 1903

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 : 85

Xenorthrius simplex Schenkling, 1903

( Figures 3C , 50 and 69C )

Xenorthrius simplex Schenkling 1903b: 16 ; 1912: 326; Corporaal 1949a: 421.

Specimens examined: Lectotype (designated here): China: Honk. Bowr.; type, Schenklg.; Typus.; Mus. Zool. Polonicum, Warszawa , 12/45; simplex, x Schklg (♂, ZMPA).

Paralectotypes: China: Honk. Bowr.; 536; type, Schklg.; Typus ; Mus. Zool. Polonicum, Warszawa, 12/ 45 (♀, ZMPA). Honk. Bowr.; Mus Stettin; Coll. S. Schenkling; Schenkling det. ; Syntypus (♀, SDEI) .

Others: China: China; 536; Xenorthrius simplex Sch. ; Bowring. ; Museum Paris, Coll. M. Pic ( MNHN) . China; Bowring. ; Schenkling det.; Homotype 24, Xenorthrius simplex, Schklg (SDEI) . China; Bowring. ; Schenkling det ( SDEI) . China, E Hubei, 17.–18.VI.2003, Dabie Shan 31.1 N 115.8 E, Wu Jia Shan forest park, Jaroslav Turna leg ( RGCM) . Hist.-Coll. ( Coleoptera ), Nr. 42783, Opilus spec ., Hong Kong. Coll. Schaum, Zool. mus. Berlin (2ex., ZMHB) .

Measurements: (9 specimens measured) Average total length: 8.9mm, range: 7.9–10.1mm, average elytral length: 5.8mm, average elytral width: 2.8mm, average pronotal length: 2.5mm, average pronotal width: 2.2mm, average head width: 2.0mm.

Head: Red-brown, cranium vested with long setae, with sparse and very fine punctation; posterior part of clypeus red-brown, margins darkened, anterior margin concave, posterior margin convex, with large punctation and a few long setae laterally, smooth centrally; ventral part smooth; antennae light red-brown, lighter then head capsule, A9 to A11 forming a distinct club, antennae reaching middle of pronotum when laid back; gular sutures diverging apically, gular process narrow.

Thorax: Average pronotal length:width ratio 1.1:1; pronotum dark red-brown, anterior margin can be somewhat lighter, densely vested with yellow setae, pronotal arch with distinct punctation, interstices among punctation larger than diameter of punctures, diameter of punctures on pronotum proper larger than on pronotal arch, interstices among punctation smaller than diameter of punctures; transverse sulcus on anterior part of mesosternum and mesepisternum more distinct on mesosternum, mesosternum centrally steeply projecting ventrally, prosternum red-brown, smooth; mesosternum red-brown, margins darkened, vested with yellowish setae; metasternum red-brown, vested with fine setae, with sparse and fine punctation; anterior metasternal process with two small, ventrally projecting, edges; scutellum oval, red-brown, lateral margins darkened.

Elytra: Average length:width ratio 2.1:1; coloration uniformly red-brown, sometimes lighter area centrally, circular subcutaneous structures visible in some of the observed specimen, densely vested with short decumbent and longer erect setae, punctation relatively large, striae 1 to 3, 8 and 9 obsolete behind first quarter, striae 8 can be longer, striae 4 to 7 obsolete behind third quarter, striae 10 often only visible as circular subcutaneous structures, interstices between striae larger than diameter of punctures, interstices within striae smaller than diameter of punctures; punctation sometimes slightly rasp-like in humeral region, interstices smooth, carination absent.

Legs: Yellow, tarsi red-brown, 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, ventrite 4 and 5 orange-brown, with relatively large punctation; male pygidium ovate, male ventrite 6 narrow, with a narrow V-shaped slight emargination. Male genitalia ( Fig. 50 ): Tegmen broadened apically; phallic plates extremely narrow, tip broader and stronger sclerotized, with horizontal furrow; spicular fork dividing into two branches after one third of length.

Distribution: China.

Seasonal occurrence: Collected in June.

Figures

FIGURE 3. Antennae: (A) Xenorthrius doliaris, (B) Xenorthrius abruptepunctatus, (C) Xenorthrius simplex and (D) Xenorthrius berndi.

FIGURE 50. Xenorthrius simplex: (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 69. Habitus photographs: Xenorthrius rufotestaceus (A), Xenorthrius scordalus n. sp. (B), Xenorthrius simplex (C), Xenorthrius stefanieae n. sp. (D), Xenorthrius stevensi (E) and Xenorthrius striatulus (F). Scale bars = 4mm.