Gymnocypris

Key to the species of genus Gymnocypris

1a. Commencement of ventral fin under the 1–3th branched ray of dorsal fin......................................... 2

1b. Commencement of ventral fin under the 4–6th branched ray of dorsal fin......................................... 6

2a. Outside gill rakers on first gill arch more than 10............................................................. 3

2b. Outside gill rakers on first gill arch fewer than 9..................................................... G. potanini

3a. Mouth terminal or subinferior; lower jaw shorter than upper jaw................................................ 4

3b. Oral fissure oblique, lower jaw equal to or longer than upper jaw..................................... G. scolistomus

4a. Inner side of lower jaw without horny layer................................................................. 5

4b. Inner side of lower jaw with horny layer........................................................ G. chilianensis

5a. Average outside gill rakers on first arch less than 18................................................... G. eckloni

5b. Average outside gill rakers on first arch more than 28............................................... G. przewalskii

6a. Pharyngeal teeth in 2 row............................................................................... 7

6b. Pharyngeal teeth in 1 row...................................................................... G. namensis

7a. Last unbranched dorsal-fin ray strong...................................................................... 8

7b. Last unbranched dorsal-fin ray weak...................................................................... 9

8a. Outside gill rakers on first arch more than 20........................................................... G. chui

8b. Outside gill rakers on first arch fewer than 20................................................... G. scleracanthus

9a. Outside gill rakers on first arch more than 20......................................................... G. dobula

9b. Outside gill rakers on first arch fewer than 20.............................................................. 10

10a. Oral fissure oblique........................................................................... G. waddelliv

10b. Oral fissure almost straight............................................................ G. pengquensis, sp. nov.