Geranomyia longispina, Zhang, Xiao, Zhang, Zehua & Yang, Ding, 2016

Zhang, Xiao, Zhang, Zehua & Yang, Ding, 2016, Five new species of Geranomyia Haliday, 1833 (Diptera, Limoniidae) from China, Zootaxa 4154 (2), pp. 139-154 : 147-148

Geranomyia longispina sp. nov.

Figs. 31 –37

Diagnosis. Prescutum yellow with three broad dark brown longitudinal stripes. Pleuron yellow with an ill-defined brown longitudinal stripe. Wing with seven large spots on costal region; Sc1 ending about opposite 3/4 of Rs, basal section of CuA1 a short distance before fork of M. Lobe of gonostylus with rostral prolongation small, base with a very long and slender spine arising from a tubercle.

Description. Male. Body length 6.0– 6.5 mm, wing length 6.0– 6.3 mm, mouthparts length 1.6 mm.

Head ( Fig. 32 ). Dark brown. Setae on head brownish black. Antenna length 1.1 mm, dark brown. Scape cylindrical. Pedicel nearly globose. Flagellomeres oval, terminal flagellomere with tip cuspate. Mouthparts dark brown with dark brown setae.

Thorax. Pronotum brownish yellow with a narrow dark brown median stripe. Prescutum yellow with three broad dark brown longitudinal stripes. Scutum yellow with middle area paler, each lobe with a large brown spot. Scutellum pale yellow with borders dark brown. Mediotergite brown ( Fig. 33 ). Pleuron ( Fig. 31 ) yellow with an illdefined brown longitudinal stripe extending from cervical region to mediotergite. Setae on thorax brownish black. Coxae and trochanters pale yellow; femora yellow with bases paler; tibiae and tarsi yellow. Setae on legs brown. Wing ( Fig. 35 ) tinged pale brownish yellow with brown pattern: seven large spots on costal region; seams along cord, m-m and basal section of M3; a spot at fork of Rs. Veins brownish yellow, darker in clouded areas. Venation: Sc long, Sc1 ending about opposite 3/4 of Rs, Sc2 at its tip; basal section of CuA1 a short distance before fork of M. Haltere length 0.8 mm, yellow with knob slightly darker.

Abdomen ( Fig. 31 ). Tergites brownish yellow. Sternites pale yellow. Setae on tergites brown and on sternites white.

Hypopygium (Figs. 36–37). Posterior margin of tergite nine emarginate. Gonocoxite with a simple ventromesal lobe. Clasper of gonostylus arched at 2/3 length, abruptly narrowed to apical spine. Lobe of gonostylus large; rostral prolongation small, base with a very long and slender spine arising from a tubercle. Paramere with mesal-apical lobe slender, tip slightly acute and curved inwards.

Female. Body length 6.5–7.0 mm, wing length 6.0– 6.5 mm, mouthparts length 1.7–1.8 mm. Similar to male, except basal section of CuA1 nearly its own length before fork of M. Cercus brownish yellow. Hypogynial valve pale brownish yellow to brown with borders darker. Tip of hypogynial valve near 1/3 of cercus ( Fig. 34 ).

Type material. Holotype male ( CAU), China: Fujian, Dehua, Guiyang, Chenxi (25°42'36"N, 118°14'24"E, 1000 m), 2010. VII.11, Xiaoyan Liu . Paratypes: 1 male 3 females ( CAU), same data as holotype .

Distribution. China (Fujian).

Etymology. The specific name (from Latin longispina = longi- (adj., meaning"long”) + spina (n., meaning spine)) refers to the long and slender spine on the lobe of gonostylus.

Remarks. This new species is somewhat similar to G. bifurcula ( Alexander, 1933) in having the similar body color, and clouds and venation of wing. It can be easily distinguished from the latter by the male hypopygium with the posterior margin of tergite nine emarginate, and the lobe of gonostylus with a small rostral prolongation and a very long and slender spine arising from a tubercle (Figs. 36–37). In G. bifurcula , the posterior margin of tergite nine is deeply and narrowly notched, and the lobe of gonostylus has a long and slender rostral prolongation and a long and dominant spine arising from rostral prolongation directly ( Alexander 1933). This new species is also somewhat similar to G. multipuncta Alexander, 1922 in having the similar structure of male hypopygium, but can be easily distinguished from the latter by the wing with Sc1 ending about opposite 3/4 of Rs and basal section of CuA1 a short distance before fork of M ( Fig. 35 ). In G. multipuncta , the Sc1 of wing ends about opposite midlength of Rs and the basal section of CuA1 beyond fork of M ( Alexander 1922).

Figures

FIGURES 31 – 35. Geranomyia longispina sp. nov. 31: Male habitus, lateral view; 32: Head, lateral view; 33: Thorax, dorsal view; 34: Female ovipositor, lateral view; 35: Wing. Scale bar: 31 = 1.0 mm; 32 – 33 = 0.5 mm; 34 = 0.1 mm; 35 = 1.0 mm.