Xenysmoderodes flos, Yang, Ni, Zhang, Runzhi & Ren, Li, 2013

Yang, Ni, Zhang, Runzhi & Ren, Li, 2013, Two new species of Xenysmoderodes from China (Coleoptera: Curculionidae: Ceutorhynchinae), Zootaxa 3620 (4), pp. 533-543 : 537-542

Xenysmoderodes flos sp. nov.

( Figs. 11–28 )

Diagnosis. This species can be distinguished from its congeners by the following characters: black in general appearance ( Fig. 11 ); rostrum with median carina from vertex to apex of rostrum ( Fig. 28 ); apical margin of pronotum, inner and distal margins of elytra dark-red and slightly raised; pronotum acute in middle of anterior margin, lateral and dorsal surfaces rather strongly convex, each side of pronotal carina with one longitudinal carina, curved from 1/3 of apical margin to baso-lateral area ( Figs 13, 14 ); odd intervals more convex than even ones, especially interval; ventrite densely covered with dense golden patch of setae on disc ( Fig. 15 ); diameter of tegminal ring 4× as long as stout apodeme ( Fig. 22 ); aedeagal body densely covered with minute spicules and moderately convex near apex ( Fig. 19 ); endophallus with two pairs of triangular sclerites near apex, one pair of slightly sinuate sclerites in middle, conjunct at basal 1/3, then curved in opposite directions ( Fig. 19 ).

Description. Male. Measurements (in mm): BL=2.00–2.10, RL=0.64–0.73, RW=0.20–0.21, PL=0.45–0.54, PW=0.77–0.85, EL=1.42–1.60, EW=1.33–1.44; SL=0.39–0.45, FL =0.11–0.12, =0.10–0.11, = =0.03–0.05, = =0.04, CL=0.17–0.20. Habitus as shown in Figs. 11, 12 .

Integument. Black in general appearance, irregularly covered with dirty-yellow scales or lacking scales. Eyes dark grey. Antennae, tibiae, and tarsi yellowish-brown. Apical margin of pronotum and inner and distal margins of elytra dark-red.

Vestiture. Mid-dorsal 1/3 of pronotum bare; frons, basal half of intervals, striae to, and humeri moderately covered with golden, linear scales; odd intervals with denser scales than even intervals. Gena and procoxae moderately covered, apical margin of metapisterna densely covered with white, oval scales. Basal 1/6 of dorsal rostrum moderately covered with golden, hair-like scales, becoming minute and sparser towards apex. Antennal funicle with apical 1/2 of articles, to, and club covered with golden, linear setae, becoming minute towards apex. Elytra with a dense, dark-grey patch at basal 1/3 of interval ( Fig. 11 ), with white, oval scales in apical area of patch; interval with a small patch of white, oval scales at middle ( Fig. 11 ). Around mesocoxae and inner surface of metacoxae densely covered with white, irregularly-shaped scales. Legs moderately covered with hair-like, golden scales on lateral surface; inner surface densely covered with white, oval scales, erect in apical 1/3. Tibiae sparsely furnished with golden setae, becoming denser towards apex and pointed obliquely to outer side. Dorsal surfaces of tarsi, distal margin of metasterna, and disc of ventrite sparsely covered, and ventral surface of tarsi densely covered with light golden setae. Sternal channel shiny and black. Mesepisterna, pro-, meso- and metasterna, middle of ventrites and, and lateral surfaces of ventrites to moderately covered with yellowish-white, oval scales. Mesepimera densely covered with white, oval scales. Metapisterna sparsely covered with golden, linear scales and moderately covered with yellow, oval scales near distal margin. Meso- and metasterna, ventrites ( Fig. 15 ) and without scales near lateral margins. Ventrite densely covered with a dense, golden patch of setae on disc. Pygidium ( Fig. 16 ) densely covered with golden setae at distal margin, becoming sparser towards center.

Rostrum ( Fig. 27 ) 1.35–1.42× as long as prothorax, basal part slightly narrower than frons; rostrum in dorsal view almost parallel-sided at basal 2/3, then abruptly curved and moderately widening towards apex; dorsum moderately punctured, with median carina from vertex to apex of rostrum. Antennae inserted at apical 1/3, insertion visible in dorsal view, scrobe deep and straight, expanding to ventral surface of rostrum near basal part, not merging; scape shiny, clavate at apex, without apical projection; funicle with article swollen and nearly as long as; rod-like; much shorter than; to oval and nearly equal in length; club spindle-like and 2× as long as wide. Eyes relatively large and prominent dorsally, not approximate anteriorly; frons moderately concave and punctured, with reticulate carina; vertex moderately convex.

Pronotum ( Figs 13, 14 ) 1.57–1.71× as wide as long, widest at base, its base 1.28–1.52× as wide as apex, constricted subapically, subparallel-sided in apical 1/5; moderately punctured on subapical, subbasal, and lateral surfaces; reticulate carinae on dorsal and lateral surfaces, lacking scales; acute at middle of anterior margin; pronotal carina complete; pronotal spine slender, acutely projected into basal 1/3 of elytra; apical margin of pronotum slightly raised; lateral and dorsal surfaces rather strongly convex, each side of pronotal carina with one longitudinal carina curved from 1/3 of apical margin to baso-lateral margin.

Elytra ( Fig. 11 ) 1.07–1.11× as long as wide, 2.96–3.15× as long as pronotum, widest at humeri, 1.69–1.73× as wide as pronotum; inner and distal margins slightly raised, lateral margin bisinuate, distal margin W-like; intervals slightly wider than striae; intervals 1 to 9 visible in dorsal view; intervals with longitudinally, regularly connected tubercules, with arcuminate apices; odd intervals slightly wider and more convex than even ones, interval 5 evidently more convex; intervals 2 and 5, 3 and 9, 4 and 7 conjoined at apex; striae deep and straight, regularly punctured, each puncture circular and separated by a distance nearly as long as its diameter.

Legs. Femora clavate, without prominent tooth; metafemora slightly stouter than pro- and mesofemora. Tibiae rod-like, pro- and metatibiae simple at apex, mesotibiae mucronate at inner apex. Procoxae separated by a distance as long as its diameter, length of profemora to protibiae=1.3:1; length of mesofemora to mesotibiae=1.5:1; length of metafemora to metatibiae=1.3:1. Tarsi with tarsomere I frustum-like, II oval, III bifid, V twice as long as III; claws obviously appendiculate.

Ventral area. Prosternum U-shaped at middle of apical margin. Sternal channel evident on prosternum and distal margin between procoxae. Venter moderately punctured. Mesepisterna 2/3 as wide as mesepimera. Metepimera spindle-like. Metepisterna subparallel except along apical 1/6, becoming slightly broader. Ventrites I and ( Fig. 15 ) united, 5× as long as, ventrite and nearly at the same length, 3–4× as long as. Ventrite I with pentagonal concavity at middle, acute at middle of apical margin,, smooth at middle. Pygidium ( Fig. 16 ) pentagonal, slightly swollen and moderately punctured.

Male genitalia. Sternite IX ( Fig. 21 ) long, dark-brown, 1.75× as long as aedeagal body. Tegmen ( Fig. 22 ) ringed, faint yellow, lacking parameroid lobes; diameter of tegminal ring 4× as long as stout apodemes; aedeagal body ( Figs. 19, 20 ) wide, dark-brown at margin, subparallel in basal 3/4, gradually constricted, projecting towards apex, densely covered with minute spicules, and moderately convex near apex; apodemes slightly longer than body. Endophallus ( Fig. 19 ) faint yellow, shorter than aedeagal body, with two pairs of triangular sclerites near apex, one pair of slightly sinuate sclerites in middle, confluent at basal 1/3, then curving in opposite directions and projected.

Female. Measurements (in mm). BL=2.07, RL=0.77, RW = 0.20, PL=0.57, PW=0.56, EL=1.50, EW=1.45; SL=0.38, FL =0.10, =0.08, = = =0.05, =0.04, CL=0.17.

Apical and distal 1/3, lateral surface of pronotum, intervals, mesepisterna, metapisterna except subapex, and outer surface of femora coarsely covered with irregularly-shaped, dirty-white scales, which become thicker posteriorly at sternal channel. Pro-, meso-, and metasterna, ventrites,, moderately covered with white, oval scales. Ventrite lacking golden setae. Rostrum and pronotum longer than in male, rostrum 1.35× as long as pronotum. Pronotum 1.58× as wide as long, its base 1.6× as wide as apex; dorsal carina on pronotum more developed, sides less convex. Elytra 2.63× as long as pronotum, 1.61× as wide as pronotum. Mesotibiae without mucro at apex; length of profemora to protibiae=1.1:1; length of mesoemora to mesotibiae=1.1:1; length of metafemora to metatibiae=1.2:1. Ventrite I ( Fig. 17 ) not concave at middle, ventrite lacking dense patch of setae and densely covered with white, oval scales. Pygidium oval, flat, lacking scales and punctures ( Fig. 18 ).

Terminalia as in Figs. 23–26 . Tergite VIII ( Fig. 23 ) widely setiferous in apical part; Sternite VIII ( Fig. 24 ) with two apical patches of slender setae, arms stout, nearly as long as apodemes; apodemes separate from each other, but fused basally, and weakly divergent near apex, coxite and stylus taken together, nearly as long as arms of sternite VIII; ovipositor with slender coxites ( Fig. 26 ), nearly 4× as long as styli; subconical, short, nearly 2× as long as wide. Spermatheca ( Fig. 25 ) with cornu attenuate; collum moderately convex; ramus weakly convex; insertion of duct and gland close to each other.

Other characters in the female are the same as in the male.

Type material. Holotype male, China, Guizhou, Zunyi, Lvyang, nature preservation zone of Kuankuoshui, Xiangguangshan country, 28°14'N, 107°12'E, 4. VI. 2010, Wang Zhiliang [IOZ(E)1803087]. Paratypes. 1 male, China, Zhejiang, Mountain Tianmu, 1050 m, 30°20'N, 119°27'E, 31. VII. 1998, Yu Zhiyong [IOZ(E)896962]; 1 female, [IOZ(E)1803082], other data as same as the holotype.

Distribution. Southern China (Zhejiang, Guizhou province).

Etymology. The species is named from the Latin “ flos ” after its distinct, dense patch of setae in the middle of ventrite V in males; it looks like a flower in full bloom.

Figures

FIGURES 11 – 14. Xenysmoderodes flos sp. nov. male holotype. 11, dorsal habitus; 12, lateral habitus; 13, dorsal view of prothorax; 14, lateral view of prothorax. Scales are 0.5 mm.

FIGURES 15 – 18. Xenysmoderodes flos sp. nov. 15 – 16, male holotype; 15, ventrites to; 16, pygidium; 17 – 18, female paratype; 17, ventrites to; 18, pygidium. Scales are 0.5 mm.

FIGURES 19 – 26. Xenysmoderodes flos sp. nov. 19 – 22, male holotype; 19, aedeagus, dorsal view; 20, aedeagus, lateral view; 21, sternite IX; 22, tegmen; 23 – 26, female paratype; 23, tergite VIII; 24, sternite VIII; 25, spermatheca; 26, coxite and stylus. Scales are 0.5 mm.

FIGURES 27 – 28. Xenysmoderodes concavus sp. nov., 27, male holotype, dorsal view of rostrum, frons without carina; Xenysmoderodes flos sp. nov., 28, male holotype, dorsal view of rostrum, frons with carina. Scales are 0.5 mm.