Fannia dorsovittata Wang

Wang, Ming-Fu, Zhang, Dong, Zheng, Shuang & Zhang, Chun-Tian, 2009, A review of the carbonaria - subgroup of Fannia Robineau-Desvoidy (Diptera: Fanniidae), with descriptions of two new species from China, Zootaxa 2204, pp. 37-47 : 40-41

Fannia dorsovittata Wang sp. nov.

Figs. 1–3 .

Description: Male: Body length 5.5 mm. Eye bare; postocular setae in one row; without occipital setae; fronto-orbital plate and parafacial with greyish-white pruinosity; the median part of frons about as wide as the distance between two posterior ocelli, about equal to antennal first flagellomere width, frontal vitta black, about as wide as fronto-orbital plate, frontal setae 7–9, nearly reaching ocellar triangle, the gaps filled with numerous fine setae, upper orbital setae absent; parafacial bare, about as wide as 2/3 of first flagellomere width in median part; antenna black, except scape brown, first flagellomere 2.0X longer than wide, arista ciliated, the longest hair equal to width of arista at base; epistoma not projecting beyond vibrissal angle, vibrissal angle behind frontal angle in profile; gena and genal dilation with black hairs, upper margin of gena without upcurved setae; proboscis stout, labella large, prementum with grayish-brown pruinosity, its length 1.7X longer than its width, palpus black, claviform, as long as prementum. Thorax black in ground colour, shining, notum with light brown pruinosity; presutural acr triserial, hair-like, prosutural acr in four uneven rows, only prescutellar pairs slightly stout, the distance between acr rows as wide as the distance between acr row and dc row, dc 2+3, ia 0+2, pra 1, about 3/5 of the length of posterior notopleural seta, notopleuron without seta; proepisternal setae 2, proepimeral seta 1 or 2; basisternum, anepimeron, meron and katepimeron bare; katepisternal setae 1:1, katepisternum without ventral spines; anterior spiracles yellowish, posterior ones brown; calypters yellow, the lower one distinctly projecting beyond the upper one. Wing brownish; veins brown, wing-base yellow, tegula black, basicosta brown, costal spine slightly longer than adjacent setae; vein Sc not curved bow-like; node of Rs bare on ventral and dorsal surfaces; veins R4+5 and M parallel to each other distally; vein R4+5 straight; crossveins without obvious cloud; haltere brownish yellow. Legs black, except trochanters, knees and fore tibia base yellow; fore tibia without ad and median p, fore first tarsomere with numerous longish setae on ventral surface; mid coxa without any hooked spines or spine-like setae on lower and outer margins, mid femur with long and sparse av and pv rows in basal half, becoming gradually denser and shorter towards apex, av row comb-like in distal part, p row long and fine, mid tibia slightly swollen in distal half, with 3 ad, 2 or 3 pd and numerous slender hairs on ventral surface, the longest one slightly shorter than mid tibia width, mid first tarsomere without basal tooth-like spines on ventral surface; hind coxa bare on posterior surface, hind femur with short av row, only 4 or 5 long av in distal half, hind tibia with 2 av, 3 ad and 1 median d. Abdomen oval, depressed and flattened, black in ground colour, shining, with light grayish brown pruinosity; syntergite 1+2 to tergite 5 each with 1 median vitta; sternite 1 with 5 or 6 hairs.

Type specimen: Holotype male, China: Liaoning: Jianchang: Mt. Dahei (40°48'N 119°42'E), 500–1142m, 2.vi.2007, Coll. C.T. Zhang.

Etymology: This specific name is derived from Latin dors (= dorsal) and vittata (= vitta), reflecting the marks of the male abdomen.

Remarks: This new species resembles F. carbonaria but differs from it in having parafacial about as wide as 2/3 of first flagellomere width in median part; the distance between acr rows as wide as the distance between acr row and dc row; the lower calypter distinctly projecting beyond the upper one; mid tibia with 3 ad and 2 or 3 pd; hind tibia with 3 ad; abdominal syntergite 1+2 to tergite 5 each with 1 median vitta. The new species is also similar to F. urbana but differs from it in having presutural acr triserial; the length of prementum 1.7X longer than its width; antennal scape brown; trochanters, knees and fore tibia base yellow.

Distribution: China (Liaoning).

Figures

FIGURES 1 – 3. Fannia dorsovittata Wang sp. nov. (male holotype). 1. Terminalia, ventral view. 2. Terminalia, lateral view. 3. Sternite 5. Scale bars = 0.25 mm.