Xenorthrius furcalis Gerstmeier & Eberle 2010, n. sp.
Creators: name: Gerstmeier, Roland
name: Eberle, Jonas
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cleridae
Xenorthrius
Xenorthrius furcalis

description: Xenorthrius furcalis Gerstmeier & Eberle, 2010 n. sp.   
(Figures 10A, 28 and 65D)  
 Specimens examined: Holotype: Taiwan: Nanshanchi, Nantou Hsien, Taiwan, 14. Apr. 1985, Y. Kusakabe leg. (♂, RGCM).   
 Paratypes: Taiwan: [Mt. Kuantao], Nantou Hsien, Taiwan, 24. Apr. 1984, Y. Kusakabe leg. (KSCT). Nanshanchi, Formosa, 26.VI.1971, Y. Maeda; Xenorthrius sp. (1ex., 1ex. 27.6.1971, EUMJ).   
 Measurements: (4 specimens measured) Average total length: 14.0mm, range: 13.2–14.7mm, average elytral length: 9.6mm, average elytral width: 3.4mm, average pronotal length: 3.0mm, average pronotal width: 2.5mm, average head width: 2.5mm.   
 Head: Red-brown, cranium vested with shorter setae, punctation distinct, interstices not exceeding one diameter of punctures; posterior part of clypeus red-brown, anterior margin concave, with large punctation and a few long setae laterally, smooth centrally; ventral wrinkled, smooth centrally; antennae red-brown, A4 longer than A3, antennomeres gradually decreasing in length from A4 towards A8, A9 to A11 forming an indistinct club, male A11 reaching slightly beyond pronotal base when laid back; gular sutures diverging apically, gular process broad.   
 Thorax: Average pronotal length:width ratio 1.2:1; pronotum red-brown, vested with short yellowish setae, pronotal arch with distinct punctation, interstices about one diameter of punctures, pronotum proper with denser punctation; prosternum red-brown, smooth, mesosternum red-brown; metasternum red-brown, punctation fine, interstices about three diameters of punctures; two strongly sclerotized edges projecting ventrally on anterior metasternal process; scutellum oval, colored like elytra.   
 Elytra: Average length:width ratio 2.9:1; suture apically strongly dehiscent, apical curve concave, uniformly red-brown, slightly lighter dorsally and near lateral margins, subcutaneous structures only slightly visible, vested with short decumbent and few longer erect setae, punctation relatively small, striae 1 and 2 obsolete behind basal quarter of elytra, striae 3 to 5 becoming constantly longer until striae 5 is entirely present, striae 6 and 7 as long as striae 5, striae 8 slightly shorter, striae 9 and 10 with weak punctation, interstices between striae about two diameters of punctures, interstices within striae about one diameter of punctures; punctation not rasp-like, carination absent.   
 Legs: Yellow, tarsal pulvilli pale; metatibiae slightly bent centrally, anterior and posterior face of each tibia carinate, carination red-brown, distinct, especially on metatibia.   
 Abdomen: Ventrites red-brown, interstices about two diameters of punctures; male pygidium suboblong, apical margin concave; female ventrite 5 with distinctive double-emargination (Fig. 10A); male ventrite 6 with distinct U-shaped emargination. Male genitalia (Fig. 28): Tegmen apically narrower, sinus deeply Vshaped; phallic plates broad; spicular fork dividing into two branches after quarter of length.   
 Distribution: Taiwan.   
 Seasonal occurrence: Collected from April to June.   
 Etymology: The specific epithet, furca, a Latin noun meaning fork, refers to the characteristic emargination of the female ventrite 5.
description: Published as part of Gerstmeier, Roland & Eberle, Jonas, 2010, Revision of the Indo-Australian checkered beetle genus Xenorthrius Gorham, 1892 (Coleoptera: Cleridae, Clerinae) 2584, pp. 1-121 in Zootaxa 2584 (1) on page 43, DOI: 10.11646/zootaxa.2584.1.1, http://zenodo.org/record/10094247