Nasimyia elongoverpa, Yang, Zai-Hua, Hauser, Martin, Yang, Mao-Fa & Zhang, Ting-Ting, 2013

Yang, Zai-Hua, Hauser, Martin, Yang, Mao-Fa & Zhang, Ting-Ting, 2013, The Oriental genus Nasimyia (Diptera: Stratiomyidae): Geographical distribution, key to species and descriptions of three new species, Zootaxa 3619 (5), pp. 526-540 : 532-534

Nasimyia elongoverpa sp. nov.

( Figs. 10–18 , 30–31 , 34 )

Diagnosis. Male eyes dichoptic; colour of tarsi pale, hind femur yellowish white, darkened only in middle, apical half of hind femur not thickened, female tip of hind femur black and thickened; hind basitarsus yellowish white, not expanded in both sexes; hind margin of genital capsule with a pair distinct protuberances; gonostylus with an inward curved tip and a spine at basal inner margin; aedeagal complex bipartite, distinctly elongated.

Description. Male, body length 6.0 mm, wing length 5.0 mm.

Head ( Figs. 10, 12 , 30 ) distinctly broader than thorax, shining black. Ocellar tubercle small, shining black, distinctly prominent, almost bare. Eyes ( Fig. 30 ) reddish brown, separated, upper facets larger than lower ones. Upper frons narrowing towards apex, the narrowest point, midway between the frontal ocellus and antennal base, frons is about 0.12 times as wide as head, shining black, lateral margin along eyes with white pubescent stripes. Antenna ( Fig. 15 ) twice as long as head, scape and pedicel yellowish brown, with sparse darker hairs, scape cupshaped, about twice as long as pedicel, first and second flagellomeres yellowish brown, remaining flagellomeres black, with black short hairs; the length of each flagellomere longer than wide; relative lengths of antennal scape, pedicel and flagellomeres 2.0:1.0:2.0:1.5:1.5:1.5:1.4:1.0:2.0:2.0, relative widths of antennal scape, pedicel and flagellomeres 0.8:0.6:0.8:0.6:0.5:0.4:0.3:0.3:0.2:0.2. Occiput shining black with sparse, light, short hairs. Proboscis yellow, but the base dark brown, with sparse long yellow hairs. Palpus dark brown.

Thorax ( Figs. 10, 12 ) slender, black, but postpronotal and postalar callus yellow, scutellum with yellowish white hind margin, scutum with dense punctation and decumbent grey short hairs; pleura with light hairs, but anepisternum bare. Wings ( Fig. 14 ) mostly hyaline, but with a median transverse dark spot near discal cell and a subapical dark spot filling entire cell r4; wing with microtrichia over most of surface; veins and stigma dark brown. Legs ( Fig. 12 ) yellowish white, with short light yellow hairs, but hind coxa dark brown to black, apical 2/3 of hind femur light brown to dark brown with dark hairs, hind tibiae yellow but slightly darker at middle, apical half of hind femur thickened. Halter black with yellow stem.

Abdomen ( Figs. 10, 12 ) slender, distinctly narrower than thorax, about 0.4 times as broad as thorax; tergite 1 narrowing posteriorly; middle of tergite 2 narrowest, remaining tergites broadened with tip of tergite 5, the widest part of abdomen; abdominal dorsum shining black, laterally brown, with dense punctation and sparse grey hairs; venter same as dorsum. Male terminalia ( Figs. 16–18 ) exposed; epandrium heart-shape, with light short hairs; proctiger small, hidden under epandrium, only its tip visible; hind margin of genital capsule with a pair of distinct protuberance; gonostylus with an aduncate tip and a spine at basal inner margin; aedeagal complex well developed and elongated, bipartite, with tooth-like protuberances.

Female ( Figs 11, 13 , 31 ). Body length 6.7–7.2 mm, wing length 5.0–6.0 mm. Similar to male except as follows: frons distinctly broader than in male, lateral sides almost parallel, narrowest width of frons 0.25x head width, shining black, with irregular lateral spots formed by white tomentum; width of head 1.1 times as broad as thorax, length of head equal to 0.6 its width in dorsal view, and to 0.7 its height in lateral view; apical 2/3 of hind tibia black and thickened; abdominal venter completely black.

Specimens examined:

Holotype 3, CHINA, Yunnan Province, Baoshan, Mts. Gaoligong (24°58’N, 98°48’E), 1800–2000m, 14.V.2011, Zaihua Yang leg. (GAFC).

Paratypes: 113, 2ƤƤ, same data as in the holotype, (GAFC); 13, 3ƤƤ, with same locality label as in the holotype but dates 29.V.-3.VI.2009, Zaihua Yang & Bin Li leg. (GUGC).

Geographical distribution ( Fig. 34 ), China (Yunnan).

Etymology. The name refers the relatively long aedeagal complex.

Remarks. This new species is very similar to N. eurytarsa , but can be distinguished from it by the separated male eyes; tarsi wholly yellowish-white, hind basitarsus not expanded; aedeagal complex elongate and tripartite distally. The eyes of the other species are contiguous in males and hind tarsi with black hind basitarsus; the hind basitarsus is expanded distinctly; aedeagal complex well developed, bipartite, each lobe expanded distally.

Figures

FIGURE 34. Map showing the known geographical distributions of Nasimyia spp.

FIGURES 10 – 13. Nasimyia elongoverpa sp. nov. adult: 10, male, dorsal view; 11, female, dorsal view; 12, male, lateral view; 13, female, lateral view.

FIGURES 14 – 18. Nasimyia elongoverpa sp. nov. 14, wing; 15, flagellum; 16, proctiger, cerci and epandrium, dorsal view; 17, aedeagal complex, lateral view; 18, genital capsule and aedeagal complex, dorsal view.

FIGURES 28 – 33. Frontal view of Nasimyia heads. 28, head of N. eurytarsa sp. nov., male frontal view; 29, head of N. eurytarsa sp. nov., female frontal view; 30, head of N. elongoverpa sp. nov., male frontal view; 31, head of N. elongoverpa sp. nov., female frontal view; 32, head of N. rozkosnyi sp. nov., male frontal view; 33, head of N. rozkosnyi sp. nov., female frontal view.