Rhinoncomimus robustus Voss, 1958

Huang, Junhao, Yoshitake, Hiraku, Zhang, Runzhi & Ito, Motomi, 2013, Taxonomic Review of the Genus Rhinoncomimus (Coleoptera: Curculionidae: Ceutorhynchinae) with description of a new species from Yunnan, China, Zootaxa 3750 (2), pp. 143-166 : 159-161

Rhinoncomimus robustus Voss, 1958

( Figs. 7–8 , 53 , 81–87 )

Rhinoncomimus robustus Voss, 1958a: 66 (in key; type locality: Fukien, Kuatun).—Korotyaev, 1997: 288 (as a distinct species); 2006: 106.—Colonnelli, 2004: 33 (in catalog)

Rhinoncomimus klapperichi: Colonnelli, 1986: 157

Supplementary description. Male. LB: 2.62–2.95 (mean, 2.82). LR: 0.63–0.79 (mean, 0.73). LP: 0.88–0.94 (mean, 0.90). N = 5 for all measurements. Male genitalia. Heavily sclerotized. Spiculum gastrale (sternite IX; Fig. 85 ) robust, evidently longer than the penis or its apodeme, bent leftward. Tegmen ( Fig. 84 ) with apodeme long and slender, nearly 1.4 times as long as the diameter of the tegminal ring, more or less widened toward the apex. Penis ( Figs. 81–83 ) long and very heavily sclerotized, rather thick in profile, more or less moderately curved downward in the basal 1/5, then slightly bent upward in the apical 1/5; sides slightly broadened from the median 1/3 to the base and to the apex, then gradually convergent apically; apical projection ( Fig. 82 ) truncate at apex. Basal part of the endophallus ( Fig. 81 ) mostly wrapped in penis, with a pair of plate-like sclerites and numerous moderately dense minute spicules in the basal part.

Female. LB: 3.03–3.24 (mean, 3.12). LR: 0.70–0.82 (mean, 0.75). LP: 1.03–1.04 (mean, 1.04). N = 5 for all measurements. Female genitalia. Sternite VIII ( Fig. 86 ) with a pair of patches of several minute setae near the apex; arms relatively broad, nearly 0.8 times as long as apodemes, slightly shorter than the coxite and stylus combined, moderately basally fused, and apically arcuate; apodemes slender, moderately divergent near the apex. Coxites ( Fig. 87 ) long and slender, nearly four times longer than styli; styli apicolaterally inserted, long and slender, nearly six times longer than wide. Spermatheca ( Fig. 88 ) with cornu slender, strongly curved and slightly attenuate; collum weakly convex; ramus indistinct; insertions of the duct and gland relatively close to each other.

Specimens examined. Paratype. 1 male, KUATUN, FUKIEN / China / 20. 6. 46 / (TSCHUNGSEN.) / Rhinoncomimus robustus / det Voss / Paratype. FUJIAN. 1 male and 1 female, Kuiqi, 10-VII-1943, IOZ(E)894785–894786 (IZCAS). 1 female, Jianyang, Huangkeng, 290 m, 20-VI-1960, S. Jiang, IOZ(E)894702 (IZCAS). Jianyang, Huangkeng, Aotou. 3 males, 950 m, 2-V-1960, Y. Zhang, IOZ(E)894698, 894731, 89762 (IZCAS). 1 male, 720–950 m, 5-V-1960, S. Jiang, IOZ(E)894675 (IZCAS); 1 male, 720–950 m, 6-V-1960, C. Ma, IOZ(E)894694 (IZCAS); 1 female, 720–950 m, 20-V-1960, Y. Zhang, IOZ(E)894666 (IZCAS); 1 male, 310 m, 19- VI-1960, S. Jiang, IOZ(E)894706 (IZCAS). 1 female, Jianyang, Huangkeng, Dazhulan, 900–1170 m, S. Jiang, IOZ(E)894768 (IZCAS). 1 female, Jianyang, Huangkeng, Guilin, 270–590 m, Y. Zhang, 20-V-1960, IOZ(E)894630 (IZCAS). Jianyang, Huangkeng, Qiliqiao. 2 males, 840 m, 1-VI-1960, S. Jiang, IOZ(E)894562, 894757 (IZCAS); 1 female, 840 m, 1-VI-1960, Y. Zuo, IOZ(E)894670 (IZCAS); 1 male, 840 m, 25-VI-1960, S. Jiang, IOZ(E)894769 (IZCAS); 1 male, 800 m, 19-VII-1960, S. Jiang, IOZ(E)894728 (IZCAS). 1 female, Wuyishan, Xingcun, Sangang–Jianyang, Aotou, 740–1170, 20-V-1960, C. Ma, IOZ(E)894559 (IZCAS). Wuyishan, Xingcun, Sangang: 1 male, 720–850 m, 27-V-1960, S. Jiang, IOZ(E)894645 (IZCAS); 1 female, 800 m, 8-VII-1960, Y. Zuo, IOZ(E)894738 (IZCAS); 3 males, 787-874 m, 117°40.327′– 117°40.012′N, 27°45.154′– 27°45.238′E, 17-IV-2009, J. Huang (ZAFU). 1 male and 1 female, 824–1225 m, Wuyishan, Xingcun, Qili– Guadun, 117°39.863′– 117°38.207′N, 27°43.949′– 27°44.188′E, 18-IV-2009, J. Huang (ZAFU). 1 male, Shaowu, chengguan, 23–29-V-1944, IOZ(E)894815 (IZCAS). HUNAN. 1 male and 1 female, Yongshun, Shanmuhelinchang, 600 m, 5-VIII-1988, S. Wang, IOZ(E)894553, 894555 (IZCAS).

Distribution. China (Fujian, Hunan).

Biological notes. Plant association remains unknown.

Remarks. This species is the largest in the genus. It can be distinguished by its strongly convex pronotum with longer subapical constriction and the thick penis. It differs from R. klapperichi and R. continuus , in its strongly curved rostrum, deeply depressed frons, and less developed mucro on male meso- and metatibia.

Figures

FIGURE 53. Geographic distributions of Rhinoncomimus klapperichi, Rh. continuus and Rh. robustus.

FIGURES 5 – 8. Habitus of Rhinoncomimus spp., males. (5 – 6) Rh. niger. (7 – 8) Rh. robustus. (5, 7) Dorsal habitus. (6, 8) Lateral habitus. Scale bars: 0.50 mm.

FIGURES 81 – 88. Male and female terminalia of Rhinoncomimus robustus from Fujian, China. (81 – 85) Male. (81) Penis, dorsal view. (82) Apex of the penis, dorsal view. (83) Penis, lateral view. (84) Tegmen. (85) Sternites VIII and IX. (86 – 88) Female. (86) Sternite VIII. (87) Coxite and stylus. (88) Spermatheca. Scale bar: 0.20 mm for 81 – 86, 0.10 mm for 87 – 88.