Dolichopeza (Nesopeza) setilobatoides Men, 2018

Men, Qiu-Lei, Dong, Yan, Yue, Chao, Cao, Yong & Xu, Zi-Kun, 2018, Six new species of Dolichopeza (Nesopeza) from China (Diptera: Tipulidae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 58 (2), pp. 589-608 : 598-599

Dolichopeza (Nesopeza) setilobatoides Men sp. nov.

( Figs 3, 6 , 17 , 41–46 )

Type locality. Taohuajian, Wuyishan National Nature Reserve, Fujian Province, China, 27°44′N, 117°38′E.

Type material. HOLOTYPE: J, CHINA: FUJIAN PROVINCE: Taohuajian, Wuyishan National Nature Reserve , 19.v.2017, coll. Qiulei Men. PARA- TYPES: 2 JJ, same data as holotype.

Diagnosis. Generally brown. Prescutum brown with four dark brown stripes. Wing strongly suffused with grayish-brown, stigma light brown. Leg with coxa and trochanter yellowish-brown, femur dark brown, tibia yellowish-brown, tarsus yellowish-brown except the white tip. Tergite nine conspicuously trilobed, the median one cone-shaped. Outer gonostylus broadened in basal half, narrowed in apical half, rounded apically, inner gonostylus with two beaks, conspicuously concaved at hind margin.

Description. Male. Length: body 10.0–10.2 mm, wing 10.2–10.4 mm, antenna 2.2–2.4mm.

Head. Rostrum short, brown. Nasus lacking. Antenna dark brown, scape elongated and cylindrical, pedicel very short, flagellomeres gradually shorter in length. Palpus dark brown. Head dark brown, occiput with median region darker in coloration.

Thorax. Pronotum brown ( Figs 3, 6 ). Prescutum brown with four dark brown stripes ( Fig. 3 ). Scutum dark brown, scutellum and postnotum yellowish-brown with brighter median region ( Fig. 3 ). Pleuron entirely brown ( Fig. 6 ). Halter with stem yellowish-brown, knob dark brown. Leg with coxa and trochanter yellowish-brown, femur dark brown, tibia yellowish-brown, tarsus yellowish-brown except white tip. Wing suffused with grayish-brown, cells c and sc not darker than ground color, stigma light brown with very small bright spots on both ends; veins brown, Sc ending about opposite half length of Rs, the latter relatively short, R 3 slightly curved, about twice as long as R 2+3, cell m 1 1.6 times longer than its petiolate, r-m distinctly longer than basal section of R

4+5

( Fig. 17 ).

Abdomen including hypopygium dark brown. Tergite nine conspicuously trilobed, median one cone-shaped, the other two biforked apically ( Figs 41, 43 ). Outer gonostylus broadened in basal half, narrowed in apical half, rounded apically ( Figs 41, 42, 44 ). Inner gonostylus with two beaks, conspicuously concaved at hind margin ( Figs 41, 42, 44 ). Sternite eight very expanded, with deep U-shaped notch in ventral view, and densely covered with long setae ( Fig. 43 ).

Semen pump with anterior immovable apodeme broadened, obtuse in lateral view ( Figs 45, 46 ). Compressor apodeme spindle-shaped, relatively elongated, two times longer than anterior immovable apodeme ( Figs 45, 46 ). Posterior immovable apodeme subequal in length to compressor apodeme, rod-shaped in dorsal view ( Figs 45, 46 ).Aedeagal guide very developed, forming thin panel extending from semen pump posteriorly, expanded apically in lateral view, with horse-head-shaped lobe directed dorsally in lateral view ( Figs 45, 46 ).Aedeagus relatively thick, gradually narrowed to apex ( Figs 45, 46 ).

Differential diagnosis. The configuration of male hypopygium of D. (N.) setilobatoides sp. nov. is very similar to that of the Indian species D. (N.) setilobata Alexander, 1968 ( ALEXANDER 1968), but differs from the latter in broader outer gonostylus, Sc ending about opposite half the length of Rs (opposite 3/4 of length of Rs in related species), cell m 1 1.6 times longer than its petiolate (cell m 1 about twice as long as its petiole). There is also a noticeable difference in the shape of sternite eight, which is narrowed posteriorly in D. (N.) setilobata , but relatively broad in the new species. The long setae on sternite eight is distinctively decussate crossing the mid-line in D. (N.) setilobata , while the midline is uncrossed in the new species.

Etymology. The specific epithet is based on the name of the related species, D. (N.) setilobata , with the Latin suffix ‘- oides ’, referring to the morphological similarity of the new species to its related species.

Distribution. China (Fujian Province).

Figures

Figs 1–6. thorax, dorsal and lateral views. 1, 4 – Dolichopeza (Nesopeza) incisuralis Alexander, 1940; 2, 5 – D. (N.) incisuraloides sp. nov.; 3, 6 – D. (N.) setilobatoides sp. nov.

Figs 13–21. Thorax, dorsal and lateral views, and wing. 13, 14 – Dolichopeza (Nesopeza) lipingensis sp. nov.; 15 – D. (N.) incisuralis Alexander, 1940; 16 – D. (N.) incisuraloides sp. nov.; 17 – D. (N.) setilobatoides sp. nov.; 18 – D. (N.) multidentata sp. nov.; 19 – D. (N.) medionodosa sp. nov.; 20 – D. (N.) jiangjinensis sp. nov.; 21 – D. (N.) lipingensis sp. nov.

Figs 41–46. Dolichopeza (Nesopeza) setilobatoides sp. nov. 41 – hypopygium, lateral view; 42 – hypopygium, dorsal view; 43 – sternite eight, ventral view; 44 – outer gonostylus and inner gonostylus; 45 – semen pump, lateral view; 46 – semen pump, dorsal view. Gray region indicates the structure and position of semen pump.