Xenorthrius lanatus 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 : 51-54

Xenorthrius lanatus Gerstmeier & Eberle, 2010 n. sp.

( Figures 33 and 66C )

Specimen examined: Holotype: Java: F.C. Drescher, G. Raoeng, Java, „Bajoekidoel“, 450–700 Mr., 12.IX.1931; ex. Coll. Zoologisch Museum, Amsterdam; Xenorthrius ephippiatus, J.J.Menier det. 1983 (♂, MNHN).

Measurements: (1 specimen measured) Total length: 8.1mm, elytral length: 5.3mm, elytral width: 2.4mm, pronotal length: 2.4mm, pronotal width: 1.9mm, head width: 1.8mm.

Head: Red-brown, cranium densely vested with relatively long yellowish setae, with distinct punctation, 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 wrinkled, smooth centrally; antennae red-brown, antennomeres slightly lighter apically, antennomeres gradually decreasing in length from A3 towards A8, A9 to A11 forming a distinct club, male antenne reaching middle of pronotum when laid back; gular sutures diverging apically, deep sulci next to gular sutures, gular process extremely narrow.

Thorax: Average pronotal length:width ratio 1.3:1; pronotum red-brown, darkened laterally, vested with yellowish setae, setae slightly longer on pronotum proper, pronotal arch broad, punctation dense, interstices smaller than one diameter of punctures, pronotum proper with coarse and dense punctation, punctation merging to longitudinal wrinkles; prosternum red-brown, smooth; mesosternum red-brown, circularly lowered centrally, there very densely vested with fine woolly setae; metasternum black, punctation fine and sparse; abdominal metaintercoxal process basally with little black coarse sclerotization; anterior metasternal process with two strongly sclerotized, ventrally projecting, edges; scutellum oval, light red-brown.

Elytra: Average length:width ratio 2.2:1; base red-brown especially laterally, one red-brown central spot in basal half of each elytron, one red-brown postmedian fascia, remainder yellow but slightly darkened at extreme apex, subcutaneous structures visible through yellow areas, vested with longer erect setae, punctation relatively large, striae 1, 2 and 9 obsolete behind basal third of elytra, striae 3 to 8 crossing postmedian fascia, becoming distinctly weaker behind it, striae 10 with weak punctation, interstices between striae about one and a half diameter of punctures, interstices within striae about one diameter of punctures, first punctures on striae 2 and 3 rasp-like in humeral region, strongly carinated along striae 3 to 7, especially in postmedian fascia.

Legs: Red-brown, coxa, trochanter and proximal part of femora yellow, tarsal pulvilli brownish; metatibiae more or less straight, anterior and posterior face of each tibia carinate, carination slightly darker than tibiae.

Abdomen: Ventrites red-brown, becoming lighter to the apex, punctation distinct, interstices one to two diameters of punctures; lateral margins of male pygidium converging; male ventrite 6 with distinct U-shaped emargination. Male genitalia ( Fig. 33 ): Tegminal sinus V-shaped; phallic plates broad, becoming constantly narrower towards base, phallic plates emarginate on the left side right before the tip in ventral view; spicular fork dividing into two branches after one fifth to one quarter of length.

Distribution: Java.

Seasonal occurrence: Collected in September.

Etymology: The specific epithet, lanatus , a Latin adjective meaning woolly, refers to the woolly pilosity of the mesosternum.

Figures

FIGURE 33. Xenorthrius lanatus: (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.