Geranomyia subablusa, Qian & Zhang, 2020

Qian, Xingyang & Zhang, Xiao, 2020, Two new Geranomyia Haliday (Diptera, Limoniidae) crane flies from Mount Jiulong in China, with an updated key to Chinese species, ZooKeys 953, pp. 105-118 : 105

Geranomyia subablusa sp. nov. Figures 3 , 4

Diagnosis.

Prescutum yellow with three broad, brown longitudinal stripes. Pleuron of thorax yellow, with a broad brown stripe. Wing with seven large spots on costal region, with second and third spots combined between C and Sc; Sc1 ending about 2/5 of Rs; basal section of CuA1 more than 2/3 of its own length before fork of M. Lobe of gonostylus large with a large rostral prolongation armed with two long, slender spines, one arising from a large fleshy tubercle, other one directly arising from rostral prolongation.

Description.

Male. Body length 6.2-6.5 mm, wing length 6.0-6.3 mm, mouthparts length 2.4-2.5 mm.

Head (Fig. 3b ). Brownish black. Setae on head black. Antenna length 1.2-1.3 mm, dark brown. Scape cylindrical. Pedicel nearly globose. Flagellomeres oval, terminal flagellomere with tip knob-like. Mouthparts dark brown, with black setae.

Thorax (Fig. 3c ). Pronotum brownish yellow, with a broad, dark-brown, median stripe. Prescutum yellow with three broad, brown, longitudinal stripes; each lateral stripe about 3/4 length of median stripe. Scutum pale yellow; each lobe with a large brown spot. Scutellum yellow, with brown sides; posterior region with a brown spot. Mediotergite dark brown. Pleuron of thorax (Fig. 3a ) yellow, with a broad, brown stripe extending from cervical region to mediotergite. Setae on thorax brownish black. Coxae yellow; trochanters yellow; femora brownish yellow; tibiae brownish yellow; tarsi brownish yellow, with terminal three segments darker. Setae on legs brownish black. Wing (Fig. 3d ) tinged with pale brownish with brownish black pattern: seven large spots on costal region, with second and third spots combined between C and Sc; seams along cord, m-m and basal section of M3; spots at fork of Rs and tip of M1+2, M3, CuA1 and A2; a very light and small spot at tip of A1. Veins brownish yellow, darker in clouded areas. Venation: Sc long, Sc1 ending about 2/3 of Rs, Sc2 at its tip; basal section of CuA1 more than 2/3 of its own length before fork of M. Halter length 1.1-1.2 mm, yellowish white.

Abdomen (Fig. 3a ). Tergites brown. Sternites pale yellow. Setae on tergites brown and on sternites white.

Hypopygium (Fig. 4 ). Posterior margin of ninth tergite emarginate. Gonocoxite stout with a blunt-apexed ventromesal lobe. Clasper of gonostylus arched at 2/3 of length, tip acute. Lobe of gonostylus large, with a large rostral prolongation armed with two long, slender spines, one arising from a large fleshy tubercle at sub-tip of rostral prolongation, other one directly arising from middle of rostral prolongation. Paramere slender, wide at base, distal part triangular. Aedeagus relatively long, with two apical lobes.

Female. Body length 6.0-7.0 mm, wing length 6.0-6.5 mm, mouthparts length 2.3-2.5 mm. Similar to male, but tenth tergite (Fig. 3e ) brown, with tip brownish yellow. Cercus brownish yellow, with basal 1/2 brown, long. Hypogynial valve brownish yellow, slender, and long, with tip near 2/3 way along cercus.

Type material.

Holotype: male (QAU), China: Zhejiang, Suichang, Mount Jiulong, Luohanyuan (28°23'24"N, 118°51'00"E, 517 m), 2019.VII.26, Xingyang Qian. Paratypes: 4 males 10 females (QAU), same data as holotype. 2 males 2 females (QAU), China: Zhejiang, Suichang, Mount Jiulong, Longkoucun (28°18'11"N, 118°56'42"E, 305 m), 2019.VII.24, Xingyang Qian.

Distribution.

China (Zhejiang).

Etymology.

The name of the new species refers to the G. ablusa (Alexander, 1967), as the two species are very similar morphologically.

Remarks.

This species is very similar to G. ablusa from India but can be distinguished from it by the femora being uniformly brownish yellow (Fig. 3a ), the yellowish white halter, and the aedeagus lacking genital openings near the apical lobes (Fig. 4b ). In G. ablusa , the femora have vague, pale brown, subterminal rings, the halter is dark brown, and the aedeagus has the genital openings subterminal and lateral in position to the apical lobes ( Alexander 1967c).

Figures

Figure 3. Geranomyia subablusa sp. nov. a Male habitus, lateral view b head, lateral view c thorax, dorsal view d wing e ovipositor, lateral view. Scale bars: 1.0 mm (a); 0.5 mm (b-d); 0.2 mm (e).

Figure 4. Geranomyia subablusa sp. nov. a male hypopygium, dorsal view b male hypopygium, ventral view. Scale bars: 0.2 mm.