Rhipidia (Rhipidia) longa, Zhang, Xiao, Li, Yan & Yang, Ding, 2014

Zhang, Xiao, Li, Yan & Yang, Ding, 2014, A review of the genus Rhipidia Meigen from China, with descriptions of seven new species (Diptera, Limoniidae), Zootaxa 3764 (3), pp. 201-239 : 218-220

Rhipidia (Rhipidia) longa sp. nov.

( Figs. 40–45 )

Diagnosis. Male antenna with eight bipectinate flagellomeres. Pleuron brown with a conspicuous black longitudinal stripe. Wing grayish white with numerous small pale gray spots and some large and dark spots; Sc1 ending near midlength of Rs; basal section of CuA1 proximad of fork of M. Lobe of gonostylus with four rostral spines.

Description. Male. Body length 5.0– 6.5 mm, wing length 6.0– 6.5 mm.

Head (fig. 41). Black, dusted with grayish white. Hairs on head brown. Antenna 1.6 mm long. Scape and pedicel brownish yellow, flagellomeres one to nine pale yellow with basal enlargements and branches brownish yellow, remaining flagellomeres brownish yellow. First flagellomere stout basally; each of flagellomeres two to nine inclusive with two branches which are the longest at fifth flagellomere and one-half longer than corresponding flagellomere; flagellomeres ten and eleven enlarged but not pectinate; terminal flagellomere longated, exceeding penultimate. Labellum and palpus brownish black with brown hairs.

Thorax (fig. 40). Generally brown, dusted with grayish white. Mesonotum brownish yellow. Pleuron brown with a conspicuous brownish black longitudinal stripe extending from cervical region to base of abdomen. Hairs on thorax white. Coxae brown; trochanters pale yellow; femora brownish yellow with bases pale yellow and tips darker; tibiae yellow with tips darker; tarsi yellow to brownish yellow. Hairs on legs brown. Wing (fig. 42) grayish white; all cells with numerous small pale gray spots; large and dark spots at base of cell Sc, middle area of cell Sc, origin of Rs, fork of Sc, fork of Rs and tip of R1; veins brownish yellow, darker in clouded areas. Venation: Sc1 ending near midlength of Rs, Sc2 near its tip; basal section of CuA1 proximad of fork of M. Halter 0.7 mm long, white with knob darker.

Abdomen (fig. 40). Tergites brownish black. Sternites pale brown. Hairs on abdomen white.

Hypopygium (figs. 43–45). Posterior margin of tergite nine emarginate. Gonocoxite with a single simple ventromesal lobe. Clasper of gonostylus arched at 2/3 length, suddenly narrowed to apical spine. Lobe of gonostylus moderate-sized; rostral prolongation long with four long spines immediately beyond midlength. Paramere with mesoapical lobe blackened, tip acute.

Female. Body length 6.5–7.8 mm, wing length 7.2 mm. Similar to male, but flagellomeres peach-shaped. Cercus and hypogynial valve pale brownish yellow.

Type material. Holotype male ( CAU), China: Zhejiang, Qinling, Wuyanling, 2007. VIII.3, Yajun Zhu. Paratypes: 1 male ( CAU), same data as holotype. 5 males ( CAU), China: Zhejiang, Tianmu, 2011. VIII.1, Tingting Zhang. 20 males 15 females ( CAU), China: Zhejiang, Mt.Tianmu, 2012. VII–IX. 1 male ( CAU), China: Fujian, Mt. Wuyi, Guadun, 2006. VIII.14, Xian Zhou. 35 males 20 females ( CAU), China: Sichuan, Mt. Omei, Linggongli, 2012. VI. 12, Xiao Zhang and Tao Li (light trap). 1 male ( CAU), China: Sichuan, Pingwu, Laohegou, 2012. V. 30, Sipei Liu. 4 males 3 females ( CAU), China: Chongqing, Jinyunshan, 2012. VIII. 4, Liu Liang and Li Zhifei. 1 male ( CAU), China: Yunnan, Zhenyuan, Mt. Ailao (1200 m), 2010. VII. 31, Liang Liang. 5 males 3 females ( CAU), Taiwan: Yilan, Yuanshan, Fushan Plant Park (635 m), 2010. XI. 12, Ding Yang. 2 males ( CAU), China: Taiwan, Yilan, Yuanshan, Fushan Plant Park (24°35'25"N 121°35'42"E, 670 m), 2011. VI. 11, Xiaoyan Liu (light trap). 2 males ( CAU), China: Taiwan, Hualian, Bilv (1800 m), 2011. VI. 19, Xiaoyan Liu (light trap). 3 males 7 females ( CAU), China: Taiwan, Taibei, Beitou, Mt. Yangming (25°9'13" N 121°32'52"E, 900 m), 2012. VI.17, Hui Dong and Lihua Wang (light trap). 1 male ( CAU), China: Taiwan, Jiayi, Mt. Ali, Peizaitong Street (1100 m), 2012. VI.7, Lihua Wang (light trap). 1 male 2 females ( CAU), China: Taiwan, Nantou, Renai, Ruiyan Stream (2200 m), 2012. VI.28, Lihua Wang.

Distribution. China (Sichuan, Chongqing, Yunnan, Fujian, Zhejiang, Taiwan).

Etymology. The specific epithet is an adjective and refers to the long rostral prolongation (Latin longa means “long”).

Remarks. This new species is somewhat similar to R. (R.) triarmata ( Alexander, 1930) from China in having similar male antenna and hypopygium except the number of rostral spine, but it can be easily distinguished from the latter by the pleuron being brown with a conspicuous black longitudinal stripe (fig. 40), the wing with numerous small pale gray spots and some large and dark spots (fig. 42), and the rostral prolongation with four spines (figs. 43–45). In R. (R.) triarmata , the pleuron is brownish yellow without conspicuous stripe (fig. 86), the wing is grayish white with mostly combined brown spots, and the rostral prolongation has three spines (fig. 89). In addition, it is somewhat similar to R. (R.) reductispina Savchenko, 1983 from Russia in having similar clouds and venation of wing, but it can be easily distinguished from the latter by the male antenna with eight bipectinate flagellomeres (fig. 41). In R. (R.) reductispina , the male antenna has ten bipectinate flagellomeres (fig. 57).

Figures

FIGURES 40 – 42. Rhipidia (Rhipidia) longa sp. nov. 40: Habitus of male, lateral view; 41: Head of male, lateral view; 42: Wing. Scale bar: 40 = 2.0 mm; 41 = 0.5 mm; 42 = 1.0 mm.

FIGURES 43 – 45. Rhipidia (Rhipidia) longa sp. nov. 43: Hypopygium, lateral view; 44: Hypopygium, dorsal view; 45: Hypopygium, ventral view. Scale bar: 43 – 45 = 0.2 mm.