Fannia fani Wang & Wu

Wang, Ming-fu, Li, Wei, Zhao, Yu-wan, Wu, Jie & Zhang, Dong, 2017, Descriptions of three new carbonaria-group species of Fannia Robineau-Desvoidy from China, with a key to the carbonaria-group species (Diptera, Fanniidae), ZooKeys 657, pp. 93-107 : 96-97

Fannia fani Wang & Wu sp. n. Fig. 1

Diagnosis.

This species is characterized as follows: presutural acr biserial; katepisternal setae 1+1; calypters yellowish; haltere yellow; mid coxa without ad; mid femur without ventral spine; mid tibia with only one d and one v at apex; hind femur with only two or three stout av on swollen part in distal half, the longest one not longer than 1/2 of hind tibial length, all other short hair-like; cercal plate without long setae cluster in upper part.

Description.

MALE. Body length 4.5−5.0 mm. Eye with sparse and short light brown hairs; upper inner facets larger than the rest; postocular setae in one row, long and fine, curved anteriorly in the upper part of head, occipital setae behind the postocular setae on vertex; fronto-orbital plate and parafacial with grayish silver pollinosity; at narrowest point frons slightly wider than the distance between outer margins of two posterior ocelli, as wide as the width of postpedicel; frontal stripe black, with thin gray pollinosity, at narrowest point slightly narrower than the width of fronto-orbital plate; frontal setae 12-15, stout, nearly reaching ocellar triangle; without orbital seta; parafacial bare, at middle as wide as the width of postpedicel; antenna black, postpedicel 1.6 times longer than wide, arista black; epistoma not projecting beyond vibrissal angle, vibrissal angle behind frontal angle in profile; subvibrissal setulae in one row, lateral of subvibrissal setulae with some fine setae; gena and genal dilation with black setulae, upper margin of gena with upcurved setae; prementum with thin grayish yellow pollinosity, 2.5 times longer than wide; palpus black, claviform, as long as prementum. Thorax black in ground color, notum with brownish gray pollinosity, and with four slightly wide but indistinct stripes; presutural acr biserial, only prescutellar pairs slightly stout, the distance between acr rows 1/2 of the distance between acr row and dc row, dc 2+3, ia 0+2, pra 1, 3/5 to 2/3 of the length of posterior notopleural seta, notopleuron without setula; proepisternal setae 2, proepimeral setae 2, around proepimeral setae with ten to 13 slender setulae; basisternum, proepisternum, anepimeron, meron and katepimeron bare; katepisternal setae 1+1, katepisternum without ventral spine; anterior spiracle yellowish, small, posterior one yellow; calypters yellowish, the lower one slightly projecting beyond the upper one. Wing brownish; veins brown; tegula dark brown; basicosta yellowish brown; costal spine inconspicuous; node of Rs bare on ventral and dorsal surfaces; vein R4+5 straight, vein M1+2 slightly close to vein R4+5 distally; crossveins without obvious cloud; halter yellow but brown in distal part. Legs entirely black; fore coxa without anterior spine on ventral surface, fore femur with complete pv row, fore tibia without ad and p; mid coxa without a hook-like spine or spine-like seta, mid femur with long and sparse av in basal part, becoming gradually denser and shorter towards apex, biserial and short spine-like in preapical part, then with a gap towards apex and with four or five comb-like setae in distal part, ad row complete but short, pv row complete and stout, biserial in preapical part, behind pv row with a complete and stout row of setae, mid tibia slightly slender in basal 2/5 and slightly swollen in distal 3/5, with one ad and one or two pd in distal half, with one d and one v at apex, and with numerous slender setulae on ventral surface, the longest one slightly shorter than mid tibial width in distal part, mid first tarsomere without basal tooth-like spine on ventral surface; hind coxa bare on posterior surface, hind femur slightly curved and swollen in distal half, with av only on swollen part, 2-3 of them stout, other trichia all short hair-like, ad row stout (Fig. 1A), posterior to posteroventral surface bare in basal 2/3, with five pv in distal 1/3, only two slightly stout, with three or four slender pv in distal part (Fig. 1B), hind tibia with one median av, without ad, with one stout median d, with one d in distal half (Fig. 1A, B). Abdomen long and flattened, black in ground color, with gray pollinosity; syntergite 1+2 to tergite 4 each with a median triangular stripe, stripe on tergite 2 slightly broader in basal half, 1/2 as wide as the width of tergite, tergite 5 with a dark median stripe; sternite 1 with setulae, sternites 2 and 3 long and narrow, sternite 4 broad, sternite 5 strongly concave on posterior margin and straight on anterior margin, with four strong setulae above (Fig. 1E); cercal plate longish, broad in ventral view, slender in lateral view (Fig. 1C, D); surstylus broad at basal part, separated into two branches at middle, in lateral view the anterior one short and curved hook-like while the posterior one long and straight (Fig. 1C, D).

FEMALE. Unknown.

Remarks.

This new species appears to be most similar to Fannia xiaoi Fan, 2000 but differs by having acr in two rows; katepisternal setae 1+1; calypters yellowish; haltere yellow; mid femur without ventral spine; mid tibia with only one d and one v at apex; mid first tarsomere without any special structure; hind femur with only two or three stout av on swollen part in distal half, the longest one not longer than 1/2 of hind tibial length, all other short hair-like (Fig. 1A); cercal plate without long setae cluster in upper part (Fig. 1C, D).

Etymology.

The new species is named after Prof. Zi-de Fan in honor of his outstanding work on Calyptratae.

Type series.

Holotype male: China, Heilongjiang, Wuying, 12.V.1979, Coll. J. Shen (SHEM). Paratype: 1 male, the same data as holotype.

Distribution.

Known only from the type locality in Heilongjiang, China.