A new species of Fannia (Diptera, Fanniidae) from Yunnan, China

Abstract

A new species of the genus Fannia (Diptera, Fanniidae) is described from Yunnan, China, namely Fanniabaihualingensissp. nov. The male habitus as well as terminalia are documented with focus-stacked photographs. A detailed comparison of new species with related species is provided.

New data on two rare species of Fannia (Diptera, Fanniidae)

“…Let us regard their results. Yan et al (2019) describe the terminalia of their species (Fig. 1) as follows: "cercus of F. baihualingensis is slightly rounded, with the hook-like projection on its lower margin strongly curved outward. "…”

“…76) placed the drawing of the genitalia of Fannia armata Meigen, 1826 (another species with remarkably long surstyli) near that of F. fasciculata, so it is easy to see the difference between these species.) Based on Hennig's drawing Yan et al (2019) implied that the cercal plate of F. fasciculata has no curved process, while that of F. baihualingensis has. However, there is a more detail draw-Figs 5-8.…”

“…At least it is reliably geographically isolated, it may be easy distinguished due to yellow legs and it is accepted as valid species during almost 100 years. Described just this year F. baihualingensis cannot be reliably distinguished and is not isolated, so Fannia fasciculata Loew, 1873 = F. baihualingensis Yan, Xu, Wang & Zhang, 2019 Distribution. F. fasciculata turned to be widely distributed (see Fig.…”

“…Then, I can offer other explanation: F. fasciculata was described from Europe but it is originated from S-E Palaearctic. In the homeland, F. fasciculata was unknown till Yan et al (2019) publication because this region was generally poorly studied, while in Europe the species probably began to spread only recently.…”