Fannia fani Wang & Wu, 2017

Вихрев, Е., 2019, Новые Ąанные По Ąвум Реąким Виąам (Diptera, Fanniidae), Amurian Zoological Journal XI (3), pp. 247-253 : 250-253

Fannia xiaoi Fan, 2000

Fannia fani Wang & Wu, 2017 , syn. nov.

Figs 9–20

Taxonomic notes. Fannia xiaoi was described from China, Inner Mongolia, Hulunbuir [env.], Chuoer [= Chuo’er, 48.5 ° N 121.5 ° E, 1000 m asl], 28.05.1960, G-R. Xiao (Fan 2000). It has body and legs black; postpedicel short and wide; parafacials widened, 1.5x as wide as postpedicel; t1 without submedian setae; f2 with long and strong ventral setae (Fig. 10); t2 with 1 ad and 2 pd, widened in apical 3/5, widened parts covered with ventral hairs (Fig. 10); t3 with 1 av and 1 ad; coxa bare at inner posterior margin; lower calypter projecting .

F. xiaoi has several unusual diagnostic characters. Eyes with sparse but rather long whitish hairs. t2 with a set of 8 elongated preapical setae (Fig. 10) resembling those in Fannia spathiophora Malloch, 1918 . tar2-1 curved and with a row of 8–9 a setulae 3–4x as long as tarsus width ( Fig. 12 ). f3 arcuate, in apical 1/3 with a large tubercle bearing 6–7 av and 5 pv very long (3/4 as long as length of t3) setae (Fig. 11). Apex of abdomen bears a dense tuft of long, waved, posteriorly directed setae, which is well seen on intact specimens (Fig. 9) (similar to that in Fannia barbata Stein, 1892 but even longer).

F. xiaoi has intricate terminalia ( Figs 13– 14 ). Cercal plate large and consists of two parts. Basal part bare medially while on lateral borders and especially posteriorly densely covered with long setae. Apical part of cercal plate long and stout, at apex bifurcated in two leaf-like processes ( Fig. 15 ). Surstyli stout, deeply bifurcated in two processes: on ventral view inner process longer and more slender, outer one shorter and more stout ( Figs 17–18 ); on lateral view outer process strongly downcurved and rounded at apex, inner process less rounded and slightly upcurved at apex ( Fig. 16 ).

In Figs 16–18 several illustrations of the surstylus of F. xiaoi are shown. Note that Figs 17–18 demonstrate that minor changes of the angle of ventral view lead to serious differences in a visible shape of the same sclerite (as recently discussed in Vikhrev, Yanbulat 2019). Synonymy. Recently Fannia fani Wang & Wu, 2017 was described from China, Heilongjiang, Wuying [48.1 ° N 129.2 ° E], 12.05.1979, J. Shen. It looks like a simplified F. xiaoi : parafacials less widened; tar2-1 not modified, without elongated a setae; t2 without set of elongated preapical setae; f3 less arcuate, with a ventral tubercle less developed, this tubercle with only 4 shorter av setae; cercal plate with only short setulae on the same places ( Figs 19–20 ). The statement by Wang et al. (2017) of 1+1 katepisternal setae instead of 0+ 1 in F. xiaoi is not correct, the latter also has 1+ 1 in both specimens examined by me. Beside the absence of long setae, the genitalia of F. fani is the same as those of F. xiaoi (see Fig. 20 taken from the original description Wang et al. 2017, 98, fig. 1c). Based on examination of my specimen I came to the same conclusion. Thus, there are only negative differences, such situation is typical for intersexual specimens frequently reported in Fanniidae ( Gregor 1994) . I regard the specimens described as F. fani as intersex males of F. xiaoi , so Fannia xiaoi Fan, 2000 = F.fani Wang & Wu, 2017 , syn. nov.

Relationships. Chillcott (1961) divided the large genus Fannia into several species groups. His division was later generally accepted for the Palaearctic Fannia ( Rozkosny et al. 1997) . Of course, these hypotheses should be sooner or later checked by mole-cular phylogeny. Wang et al. (2009 and 2017) placed F. xiaoi and F. fani in the F. carbonaria species group. In my opinion the authors reasoning is groundless. To begin with the fact that there is no characteristic of F. carbonaria group neither in ( Wang et al. 2009) nor in ( Wang et al. 2017). I believe that F. xiaoi is related to F. barbata . These species share the following uncommon characters: a short and wide postpedicel; remarkably wide parafacials; hairy eyes; the apex of abdomen with a tuft of long setae. Both species are restricted to a spring time ( F. barbata — early May, F. xiaoi — late May).

New records. Russia: Buryatia reg.: Ust- Zaza [53.2 ° N 111.7 ° E, 970 m asl], 31.05.1969, A. Rasnitsin & V. Zherikhin, 1 ♂ ; Baisa [53.98 ° N 113.59 ° E, 830 m asl], 28.05.1969, V. Zherikhin, 1 ♂ ; Krasnoyarsk reg., Tanzybei env., 53.07 ° N 93.13 ° E, 450 m asl, 28– 29.05.2018, N. Vikhrev, 1 intersex ♂ (all Zoological Museum of Moscow University, Russia) .

Distribution. China: Inner Mongolia and Heilongjiang; Russia: Buryatia and Krasnoyarsk regions.

Figures

Figs 12–18. Fannia xiaoi: 12 — tar2-1 covered with a setulae, dorsal view; 13 — male terminalia, ventral view (from Fan 2000, 346, fig. 4); 14 — male terminalia, ventral view; 15 — cercal plate, ventral view; 16 — surstylus, lateral view; 17 — surstylus, ventral view; 18 — the same surstylus viewed from slightly different angle, ventral view Рис. 12–18. Fannia xiaoi: 12 — tar2-1 с переΔними воΛосками, виΔ сверху; 13 — генитаΛии самца, вентраΛьно (из Fan 2000, 346, fig. 4); 14 — генитаΛии самца, вентраΛьно; 15 — церки, вентраΛьно; 16 — сурстиΛь, ΛатераΛьно; 17 — сурстиΛь, вентраΛьно; 18 — тот же сурстиΛь, вентраΛьно, но поΔ немного Δругим угΛом зрения

Figs 19–20. Fannia xiaoi, intersex: 19 — general view; 20 — male terminalia, ventral view (from Wang et al. 2017, 98, fig. 1c) Рис. 19–20. Fannia xiaoi, интерсекс: 19 — общий виΔ; 20 — генитаΛии самца, вентраΛьно (из Wang et al. 2017, 98, fig. 1c)