Nasimyia rozkosnyi, 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 : 535-537

Nasimyia rozkosnyi sp. nov.

( Figure. 19–27 , 32–33 , 34 )

Diagnosis. This species is very similar to N. eurytarsa and N. elongoverpa . However, this species has in both sexes the lateral margins of tergites 1–3 and sternites 1–3 with yellow lateral marks; apical half of hind femur and tibia and hind basitatarsus expanded, male hind basitarsus black, female hind basitarsus yellowish white.

Description. Male. Body length 6.0– 7.1 mm, wing length 3.8–4.1 mm.

Head ( Figs. 19, 21 , 32 ) slightly broader than thorax, length of head about 0.8 times as width in dorsal view, near equal to height in profile, shining black. Ocellar tubercle small, shining black, distinctly prominent, with sparse grey setae; ocelli brown yellow. Eye reddish brown, upper facets larger than the lower. Upper frons small, sub-triangular, center shining black, lateral margin along eye with white stripe formed by white pubescence. Antenna ( Fig. 24 ) twice as long as head, scape and pedicel yellowish brown, with sparse darker hairs, scape cupshaped, twice as long as pedicel; first flagellomere yellowish brown, following flagellomeres black, with dense black short hairs; the length of each flagellomere longer than its width; relative lengths of antennal scape, pedicel and flagellomeres 1.0:0.5:1.2:1.0:0.8:0.8:1.0:1.0:1.1:1.2, relative widths of antennal scape, pedicel and flagellomeres 0.9:1.2:1.0:1.0:1.0:0.9:1.0:1.1:1.1:1.1. Face shining black, with nose-like medial projection, with black hairs on the median projection, remaining setae denser and lighter; lateral vitta consisting of white tomentum distinct along eye margin. Occiput shiny black with sparse white short pubescence. Proboscis yellow, but base black, with sparse yellowish-brown long hairs. Palpus black.

Thorax ( Figs. 19, 21 ) relatively stout and short, approximately 1.4 times longer than wide; black, except postpronotal callus, postalar callus and hind margin of scutellum light brown; scutum with dense punctation and decumbent golden short hairs. Pleura with light hairs, but anepisternum nearly bare; scutellum black, with yellowish and rounded posterior margin. Wing ( Fig. 23 ) mostly hyaline, but with a median transverse dark spot near discal cell and subapical dark spot extending over entire cell r4; veins and stigma dark brown, wing covered with microtrichia over most of surface. Legs: fore coxa yellow, mid and hind coxae black; fore and mid femora brownish yellow, basal half of hind femur yellowish white, apical half darkened to black; fore and mid tibiae with basal half brownish yellow, apex brown to black, hind tibia black but with yellow base; tarsi yellowish white, but hind basitarsus black; hind femur and tibia thickened at apical half, hind basitarsus expended, legs with short hairs, their colour same as background colour. Halter black with yellow stem.

Abdomen ( Figs. 19, 21 ) slender, twice as long as thorax but distinctly narrower, basal width of tergite 1 only half of thorax, tergite 1 narrowing posteriorly, width of hind margin only half of basal margin, middle of tergite 2 most narrow, following part of abdomen broadened till the tip of tergite 5 being widest part of abdomen; dorsum black except pale brown to yellow lateral part on tergite 1–3; whole dorsum with dense punctation and sparse white hairs, hairs longer and more erect at base of abdomen; sternites from apical half of sternite 1 to sternite 3 yellow, remainder dark brown to black. Male terminalia ( Figs. 25–27 ): epandrium heart-shape, with sparse hairs; proctiger very small and nearly hidden under epandrium, hind margin of genital capsule with a pair of median protuberances; gonostylus leaf-shaped; aedeagal complex tripartite.

Female ( Figs. 20, 22 , 33 ). Body length 7.0 mm, wing length 4.5 mm. Size slightly larger than in male, similar to male but eyes separated, frons at narrowest point 0.25 as broad as head, with lateral margins almost parallel, shining black, symmetrical whitish pubescent spots distinct. Frons slightly protuberant just above antenna, hind basitarsus yellowish white, not expanded and black as in male.

Specimens examined. Holotype: 3, CHINA, Yunnan Province, Ruili, Moli (24°00’N, 97°49’E), 770m, 15.V.2009, Zaihua Yang & Bin Li leg. (GUGC).

Paratypes: CHINA: 93, 1Ƥ, same data as holotype (GUGC). 93, 13ƤƤ, with same locality label as the holotype but dates 5.VI.2011, Zaihua Yang leg.; 33, 14ƤƤ, Yunnan Province, Yingjiang, Nabang (24°45’N, 97°33’E), 300m, 11.V.2009 (13), 1.VI.2011 (23, 14ƤƤ), Zaihua Yang leg. (GAFC); 33, Yunnan Province, Mengla, Bubeng village, (21°35’59”N, 101°35’05”E), 9.V.2009, Tingting Zhang leg (CAUC); 13, 1Ƥ, Yunnan Province, Mengla, Bubeng village, (21°35’59”N, 101°35’05”E), 11.V.2009, Tingting Zhang leg (CAUC); 13, Yunnan Province, Mengla, Bubeng village, (21°35’59”N, 101°35’05”E), 8.V.2009, Guoquan Wang (CAUC) leg; 13, Yunnan Province, Mengla, Longmen, (21°23’45”N, 101°38’24”E), 9.V.2009, Xiaoshuan Bai leg (CAUC); 1Ƥ, Yunnan Province, Mengla, Yaoqu, (21°43’21”N, 101°32’42”E), 9.V.2005, Xiaoshuan Bai leg (CAUC).

THAILAND: 13, Mae Hong Son, Soppong, sweeping near Nam Lang river, 26.V.2011, (19°31'06.01''N; 98°15'23.79''E), 613m, D. Kovac leg. (SMF), (= 19.518N, 98.256E); 23, Mae Hong Son Prov., Pangmapha Distr., near Ban Nam Rin, sweeping in seepages area, 11.V. 2011, 929m, D.Kovac leg. (19°27’19.54”N, 98°17’01.44”E) (FSMU); 13, Mae Hong Son Prov., Pangmapha Distr., near Ban Nam Rin, sweeping vegetation (bamboo), 18.V. 2011, 929m, D. Kovac leg., (19°27’19.54”N, 98°17’01.44”E); 33, 2ƤƤ, Mae Hong Son Prov., Pangmapha Distr., near Ban Nam Rin, sweeping from bamboo leaves, 26.V. 2011, 929m, D. Kovac leg. (19°27’19.54”N, 98°17’01.44”E) (SMF); 1Ƥ, Mae Hong Son Prov., Pangmapha Distr., near Ban Nam Rin, sweeping from bamboo leaves, 21.V. 2011, 929m, D. Kovac leg., (19°27’19.54”N, 98°17’01.44”E) (FSMU); 13, Mae Hong Son Prov., Pangmapha Distr., near Ban Nam Rin, sweeping from bamboo leaves, 21.V.2011, D. Kovac leg. (SMF); 13, Chiang Mai Prov., Mae Rim Rd., 7.6 km N Hwy11, 23.V.2000, D. Yanega leg. (UCR) (18.87N, 98.96E); 13, 17 km NW Loei, 18.III.1967, R. R. Pinger leg. (USNM), (17.47N 101.6E), 1200m.

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

Etymology. The species is named after Prof. Rudolf Rozkošný, an outstanding dipterist and scholar. He recognized this species independently from us, and was so generous to step back and provide us with all his material and notes.

Remarks. The new species is very similar to N. elongoverpa and N. eurytarsa . It can be distinguished from them by the black abdomen being pale brown to yellow laterally on tergite 1–3; male hind basitarsus black and expanded, female hind basitarsus yellowish white, not expanded as in male; hind margin of genital capsule with a pair of median protuberances, gonostylus leaf-shaped, aedeagus short and tripartite distally; in N. elongoverpa and N. eurytarsa the abdominal dorsum completely black without distinctly yellow part on tergites 1–3; hind margin of genital capsule without a pair of median protuberances, aedeagus is well developed and bipartite distally, the aedeagus of N. elongoverpa is elongate and expanded in distal part; moreover, in N. elongoverpa the male and female hind basitarsus is yellow and not expanded; the gonostylus is provided with an aduncate tip and a spine at the basal inner margin; in M. eurytarsa the male and female hind basitarsus is black and expanded; gonostylus with rectangular protuberance at the inner margin of base.

Figures

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

FIGURES 19 – 22. Nasimyia rozkosnyi sp. nov. adult: 19, male, dorsal view; 20, female, dorsal view; 21, male, lateral view; 22, female, lateral view.

FIGURES 23 – 27. Nasimyia rozkosnyi sp. nov. 23, wing; 24, flagellum; 25, proctiger, cerci and epandrium, dorsal view; 26, aedeagal complex, lateral view; 27, 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.