Rhinoncomimus rhytidosomoides (Wagner, 1944)

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 : 165-166

Rhinoncomimus rhytidosomoides (Wagner, 1944)

( Figs. 11–12 , 97–104 , 105 )

Homorosoma rhytidosomoides Wagner, 1944c: 100 (type locality: Fukien, Shaowu; Kwangtseh).? Rhinoncomimus rhytidosomoides : Voss, 1958: 67.

Rhinoncomimus rhytidosomoides: Korotyaev, 1997: 287 —Hong, Egorov and Kwon, 1999: 59—Hong, Egorov and Korotyaev, 2000: 115.—Korotyaev and Hong, 2004: 145.—Colonnelli, 2004: 33 (in catalog)—Korotyaev, 2006: 109 (Fujian, Taiwan).

Supplementary description. Male. LB: 1.96–2.17 (mean, 2.21). LR: 0.5.–0.71 (mean, 0.61). LP: 0.58–0.75 (mean, 0.69). N = 5 for all measurements. Male genitalia. Spiculum gastrale (sternite IX; Fig. 101 ) slender, evidently longer than the penis or its apodeme, bent leftward. Tegmen ( Fig. 100 ) with apodeme slender, nearly 1.3 times as long as the diameter of the tegminal ring, more or less widened toward the apex. Penis ( Figs. 97–99 ) long and slender, relatively thin in profile, slightly bent upward in the apical 1/3; sides subparallel in basal half, then gradually convergent apically; apical projection ( Fig. 98 ) truncate at apex. Basal part of the endophallus ( Fig. 97 ) with a pair of plate-like sclerites, numerous moderately dense minute spicules, and numbers of smaller plate-like sclerites.

Female. LB: 2.30–2.89 (mean, 2.60). LR: 0.70–0.82 (mean, 0.76). LP: 0.88–0.95 (mean, 0.90). N = 5 for all measurements. Female genitalia. Sternite VIII ( Fig. 102 ) 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 subparallel; apodemes slender, moderately divergent near the apex. Coxites ( Fig. 103 ) robust, nearly three times longer than styli; styli apicolaterally inserted, long and slender, nearly five times longer than wide. Spermatheca ( Fig. 104 ) with cornu short, strongly curved and slightly attenuate; collum strongly convex; ramus distinct; insertions of the duct and gland relatively close to each other.

Specimens examined. CHINA. FUJIAN. 1 male and 2 females, 1-X-1945 (IZCAS). JIANGXI. 7 males and 9 females, Yingtan, Mt. Longhushan, VIII. 2003, Li et al. (NIAES). HUANAN. 1 female, Tongdao, Mujiao, J. Wang, 26-VII-2004, IOZ(E)1803617(IZCAS). TAIWAN. 5 males and 1 females, Taitung, Chihpen-Wanchuan, 27–29-III- 1995, H. Kojima (NIAES). 1 female, Chi Pon Spa, 2-VI-1988, K. Baba (NIAES). KOREA. 1 female, Kwangnung, Pocheongun, 14-VI-1983, K. Morimoto (NIAES). 1 male, Gyongsangnamdo, Mt. Jirisan, Bycjum valley, 9-VIII- 1989, Lee lab (NIAES). 1 male, Gyongsangnamdo, Hadonggun, Kaehwameon, Whangjangri, 17-VII-1991, K. Morimoto (NIAES). 1 male and 1 female, Chunchongun, Dongsanmyon, Bougmyungri, 21-VII-1992, J.D. Bae (NIAES).

Distribution. China (Fujian, Jiangxi, Hunan, Taiwan), Korea.

Biological notes. This species is found on Polygonum thunbergii Sieb. et Zucc. (Polygonaceae) (Korotyaev, 2006).

Remarks. The species is closely related to R. latipes but can be distinguished by having slender tarsi with segment III less than twice as wide as segment II, and protibia minutely mucronate. Moreover, the apex of the penis is truncate, different from the rounded apex in R. latipes .

Figures

FIGURE 105. Geographic distributions of Rhinoncomimus latipes and Rh. rhytidosomoides.

FIGURES 9 – 12. Habitus of Rhinoncomimus spp. (9 – 10) Rh. latipes, female. (11 – 12) Rh. rhytidosomoides, male. (9, 11) Dorsal habitus. (10, 12) Lateral habitus. Scale bars: 0.50 mm.

FIGURES 97 – 104. Male and female terminalia of Rhinoncomimus rhytidosomoides from Jiangxi, China. (97 – 101) Male. (97) Penis, dorsal view. (98) Apex of the penis, dorsal view. (99) Penis, lateral view. (100) Tegmen. (101) Sternites VIII and IX. (102 – 104) Female. (102) Sternite VIII. (103) Coxite and stylus. (104) Spermatheca. Scale bar: 0.20 mm for 97 – 102, 0.10 mm for 103 – 104.