Fannia serena (Fallen, 1825)

Wang, Ming-Fu, Zhang, Dong & Xue, Wan-Qi, 2006, A review of the F. serena - subgroup of Fannia Robineau-Desvoidy (Diptera: Fanniidae), with the description of two new species from China, Zootaxa 1162, pp. 33-43 : 35

Key to the subgroups of the F. serena ­group

1 Abdomen not becoming narrow towards basal part, the widest part on posterior margin of syntergite 1+2 ........................................................................................................... 2

­ Abdomen becoming distinctly narrow towards basal part, the widest part on posterior margin of tergite 3 .................................................................. F. mollissima ­subgroup

2 Presutural acr biserial; male cerci without paired appendent processes, if presutural acr triserial, then cerci with 1 finger­like protuberance ............................................... 3

­ Presutural acr triserial; male cerci with paired appendent processes.............................. ................................................................................................... F. rondanii ­subgroup

3 Mid femur with 2–3 (rarely 4) spine­like setae on av surface, hind tibia with 2 av or 2 ad ....................................................................................................... F. sociella­ subgroup

­ Mid femur without spine­like setae on av surface, hind tibiae usually with 1 av or 1 ad, if hind tibia with more than 1 seta on av or ad surface, then male cerci cupuliform ..... ....................................................................................................... F. serena­ subgroup