Key to species (males) of Amphinemura from Guangdong

1. Epiproct with trifurcate tip (Figs. 3, 11, 16 & 21) ....................................................................................... 2

– Epiproct with tip not trifurcate (Figs. 8 & 25)............................................................................................. 5

2. Lateral arms of epiproct sclerotized and corkscrew-like (Fig. 21) ............................................ nanlingensis

– Lateral arms not corkscrew-like (Figs. 3, 11 & 16)..................................................................................... 3 3. Outer lobe of paraproct with apical spines (Fig. 15). ..................................................................... fleurdelia

– Outer lobe of paraproct without apical spines (Figs. 5 & 20)...................................................................... 4

4. Outer lobe of paraproct terminating into a sharp hook (Fig. 5)....................................... ancistroidea n. sp.

– Outer lobe of paraproct short and finger-like (Fig. 20). ...................................................... guangdongensis

5. Outer lobe of paraproct connecting to median lobe by a blade-shaped sublobe, its apex with triangular notch (Fig. 29) ...................................................................................................................... scalprata n. sp.

– Outer lobe of paraproct with constricted at base, forming an expanded, triangular apex (Fig. 10) .............. ................................................................................................................................................ filarmia n. sp.