Key to species of Liparura based on male characters

1. Male forceps simple, without any tooth or dorsal edge (Steinmann 1993: fig. 275; Fig. 6A)........ L. simplex Brindle, 1975

- Male forceps with inner tooth or teeth or dorsal edge basally.................................................. 2

2. Male forceps with dorsal edge basally..................................................................... 3

- Male forceps without dorsal edge basally.................................................................. 4

3. Male forceps straight and without internal teeth (Steinmann 1993: fig. 276; Fig. 6B).............. L. punctata Burr, 1910

- Male forceps slightly curved with 1-2 small teeth at base (Matzke, 2012: Table VII, fig. 6; Fig. 6C)................................................................................................... L. charlottea Matzke, 2012

4. Male ultimate tergite with smaller, but well-marked lateral spine (Steinmann 1983: fig. 9; Fig. 6D)................................................................................................ L. cornuta (Bey-Bienko, 1959)

- Male ultimate tergite without lateral spine.................................................................. 5

5. Male ultimate tergite with four black longitudinal stripes...................................................... 6

- Male ultimate tergite without longitudinal stripes............................................................ 7

6. Abdomen deeply punctuate; inner margin of forceps crenate and with a large tooth at middle (Srivastava 1977: fig. 4e; Fig. 6E)........................................................................... L. serrata Srivastava, 1977

- Abdomen shallowly punctate; inner margin of forceps smooth, except for a small tooth at middle (Srivastava 1977: fig. 4a; Fig. 6F)....................................................................... L. kamengensis Srivastava, 1977

7. Base of male forceps each with two teeth (Figs 2, 6H).................................... L. chongqingensis sp. nov.

- Male forceps armed with one or two teeth but not at base...................................................... 8

8. Pronotum almost quadrate; abdominal tergites shallowly punctate; forceps armed with a strong or weak tooth medially (Kapoor et al. 1971: fig. 89; Fig. 6I)............................. … L. debrepaniensis (Kapoor, Bharadwaj & Banerjee, 1971)

- Pronotum longer than broad; abdominal tergites deeply punctate; forceps armed with one or two teeth (Fig. 6G)........................................................................................ L. dentata Srivastava, 1977