Fannia xuei, Wang, Ming-Fu & Wang, Rong-Rong, 2006

Wang, Ming-Fu & Wang, Rong-Rong, 2006, A review of the hirticeps ­ group of Fannia Robineau­Desvoidy (Diptera: Fanniidae), with the description of one new species from China, Zootaxa 1295, pp. 61-68 : 64-65

Fannia xuei sp. nov.

Figs 1–3 .

Type material: Holotype male, China: Guizhou Province: Mt. Fanjing, 1700m, 13.vii.1994, Coll. M.F. Wang. Paratypes: 2 males, same data as holotype.

Description: Male: Body length 6.0 mm. Eye with sparse and short hairs, facets slightly enlarged on anterior margin in upper part; the median part of frons as wide as the distance between two posterior ocelli, about 4/5 of first antennal flagellomere, frontoorbital plate and parafacial with greyish­white pruinosity, frontal setae 9–10, reaching ocellar triangle; parafacial bare, the median part 1/2 of the width of first antennal flagellomere; antenna black, first flagellomere 2.5X longer than wide, arista almost bare, the longest individual hairs as long as aristal base; epistoma slightly projecting to vibrissal angle, vibrissal angle behind frontal angle in profile; proboscis short, prementum shining, 2.0–2.5X longer than wide; palpus dark brown, claviform, slightly longer than prementum; gena and postcranium with black hairs. Thorax ground­colour black, notum with densely brownish­grey pruinosity, without longitudinal stripes; presutural acr biserial, ia 0+2, dc 2+3, pra 2, the anterior one stout, about 2/3 of the length of posterior notopleural seta; notopleuron, ventral surface and lateral margin of scutellum bare; basisternum, proepisternum, anepimeron, meron and katepimeron bare; katepisternal bristles 1:1, katepisternum without ventral spines; anterior spiracle yellowish­brown, posterior one brown; calypters yellow, the lower one projecting beyond upper one. Wing brownish; tegula blackish­brown, basicosta yellow, costal spine inconspicuous; vein Sc not curving bow­like; node of Rs bare on ventral and dorsal surfaces; veins R4+5 and M straight and parallel; crossveins without obvious cloud; haltere brownish­yellow. Legs black, only knees yellowish; fore femur with stout pv row; fore tibia with 1–2 shortish ad in distal half, 1 submedian p; fore first tarsomere with 1 stout basal seta on ventral surface; mid coxa without any hooked spines or spine­like setae on lower and outer margins; mid femur with complete av row, long and sparse in basal part, towards apex gradually becoming shorter and denser, pectinate in basal 1/3, ad row complete, pv row stout, becoming shorter from base to apex, becoming slightly biserial in distal half; mid tibia slightly swollen in distal half, with 2–3 ad, 3 p and numerous erect hairs on ventral surface in distal half, the longest one about equal to the width of mid tibia; mid first tarsomere without basal tooth­like spines; hind coxa bare on posterior surface; hind femur with 1 stout av in subapical part, complete ad row, sparse and long, 2–3 subapical setae stout, conspicuous pv row, setulose basad, from basal 1/4 to preapical part with two rows of fine, long and curled setae, becoming setulose in apical 1/4, between submedian and preapical part with numerous dense and long rows of setae on the ventral surface of swollen part, the longest ones about equal to or slightly longer than the width of hind femur; hind tibia with 1 av, 1 median ad, 1 median d, and 12–13 erect setae in distal 3/5. Abdomen long, depressed and flattened, ground­colour black, with grey pollinosity, tergites 2 to 4 each with black triangular marks, tergite 5 only with narrow median stripe in basal half; sternite 1 with hairs.

Female: Unknown.

Remarks: This new species resembles Fannia atra (Stein) but differs from it in having hind femur with dense clumped setae; frons broad; antennal first flagellomere 2.5 X longer than wide; fore tibia with 1–2 ad and 1 submedian p; mid tibia with 3 p; hind tibia with 1 av, without pd.

Etymology: The new species is named after Prof. Wan­Qi Xue from Shenyang Normal University, in honor of his outstanding work on Chinese flies.

The type specimens of this species are deposited in the Institute of Entomology, Shenyang Normal University, Shenyang, Liaoning Province, China.

Discussion: The structures of the proboscis and the chaetotaxy of the hind coxa furnish stable species­group characters ( Chillcott 1961). There is no doubt that this new species belongs to the F. hirticeps­ group, based on the morphological characters of having proboscis short, prementum 2.0–2.5 X longer than wide, hind coxa posteroventrally bare and eye with hairs.

Distribution: China: Guizhou.

Figures

FIGURES 1 – 3. Fannia xuei sp. nov. (male holotype). 1. Terminalia, posterior view, scale bar = 0.5 mm. 2. Terminalia, lateral view, scale bar = 0.5 mm. 3. Sternite 5, scale bar = 0.25 mm.