Chuntiania scutiseta Xue, 2022

Yang, Kuiwen, Xue, Wanqi & Tong, Yanfeng, 2022, A new genus and two new species of Azeliinae from China (Diptera: Muscidae), Zootaxa 5154 (3), pp. 393-400 : 395-397

Chuntiania scutiseta Xue , sp. nov.

( Figures 2–6 , figures 12–14)

Description. Male. Body length 4.2–4.5 mm. Head. Eye bare, the upper inner facets distinctly bigger than lower outer facets; fronto plate contiguous in the middle; frontal vitta black, without interfrontal setae and ocellar triangle; triangle on 2/5 of upper part of frons; frontal seta with 5–6 pairs; proclinate orbital seta absent; fronto plate and parafacial covered with sparse grey pruinosity; parafacial narrow towards lower part, the middle part about 1/2 of postpedicel in width; facial ridge without setulae; lunule dark brown, covered with grayish pruinosity; antenna black; arista dark brown and long ciliate, the longest cilia about 2/3 of postpedicel width; without distinctly facial carina; epistoma not projecting; vibrissal angle situated behind frontal angle; gena about 1/9 of eye in height; genal and postgenal hairs entirely black; prementum shining and 2x as long as high; labellum about 1/2 of prementum in length; without developed prestomal teeth; palpus blackish-brown, about 1.2x as long as prementum.

Thorax. Black in ground color, covered with sparse grey pruinosity, slightly shining; scutum with 4 indistinct black vittae; acr 0+1, anterior acr 4 rows; dc 2+3; ial 0+2; pra absent; notopleural setae 2; postpronotal setae 2; without outer posthumeral seta; scutellum same color as thorax, lateral and lower surfaces bare, basal scutellar seta strong, about 2.5x as long as small and short apical scutellar seta; notopleuron, basisternum of prosternum, anepimeron, katepimeron and meron bare; anterior anepisternal seta 1; no seta between the first and the second posterior anepisternal setae; katepisternal setae 1+2; katatergite covered with hairs; subalar sclerite bare; anterior and posterior spiracle brown, posterior spiracle small.

Wings. Black and light; tegula dark-brown; basicosta brown; subcostal sclerite without setula; costal spine short; ventral surface of C with hairs; Sc not bent as a bow; dorsal and ventral surface of radial node bare; crossveins r-m and dm-cu straight and not clouded; R 4+5 and M 1 slightly straight, distal part parallel each other; A 1 +CuA 2 short, A 2 straight and absolutely not around end of A 1 +CuA 2; calypter brown, lower calypter glossiform; halter brownish; halter knob wide and big, and triangle in profile.

Legs. Femora and tibiae yellow, fore femur and tarsi light brown, coxae and trochanter dark-brown. Fore femur without distinct av, no dentation on distal part; fore tibia without median p, 1 pre-apical dorsal seta; mid femur without distinct av, 2 pre-apical pd, 3-4 pv on basal 1/4; mid tibia with 2 p, 1 apical dorsal seta, without av and ad; hind femur with 4 av on basal 1/3, without pv, hind tibia with 2 av, without pd and pv, 1 pre-median ad, 1 apical dorsal seta, 1 apical av; hind coxa without pd; tarsi longer than tibiae. Fore leg claws shorter than pulvillus, claws about 4/5 of tarsomere 5 in length; mid and hind legs claws longer than pulvillus, claws about 2/3 of tarsomere 5 in length.

Abdomen. Dark-brown in ground color, short-subulate in dorsal view, covered with sparse grey pruinosity, slightly shining, without dark median vitta on tergites, posterior margin of tergite 3 without median marginal seta, tergites 4 and 5 with complete row of posterior marginal setae; tergite 4 with 2 strong discal setae, tergite 5 with 3 strong discal setae; sternite 1 bare; long triangle on lateral lobe of sternite 5 in ventral view; cerci heart-shaped; surstylus narrow and apical part slightly slant towards posterior part in profile, basal part wide; pregonite strongly sclerotized and plate-like, its distal half distinctly bent outwards; postgonite absent; basiphallus strong, distiphallus short and small, and without spinule on surface; epiphallua strongly sclerotized; phallapodeme slender; acrophallus with sclerotized area.

Female. Unknown.

Type material. Holotype ♂, CHINA: Baima Snow Mountains , 4100m, 98°58'E, 28°18'N, Deqen, Yunnan Province, 17.vii.2017, by Chuntian Zhang ( SYNU). Paratypes, 2♂, CHINA: Mt. Moirigkawagarbo , 3300 m, 98°88’E, 28°44’N, Deqen, Yunnan Province, 18.vii.2017, by Xinyi Li ( SYNU).

Etymology. The specific name “scutiseta” is derived from two Latin words and refers to the extremely strong basal scutellar setae.

Distribution. China (Yunnan).

Figures

FIGURES 2–6. Chuntiania scutiseta Xue, sp. nov. (male): 2. Abdomen in dorsal view, scale bar = 1.0 mm; 3. Sternite 5 in ventral view, scale bar = 0.2 mm; 4. Cerci in posterior view, scale bar = 0.1 mm; 5. Terminalia in profile, scale bar = 0.1 mm; 6. Genitalia in profile, scale bar = 0.1 mm.