Key to males of Cladotanytarsus from China

1 Frontal tubercles present ............................................................................................... 2

– Frontal tubercles absent ............................................................................................... 7

2 Anal point short and tapering; spinules absent (Fig. 3; Langton & Garcia 2000: Figs. 1–6; Wang & Zheng 1993: Figs. 12, 13) ................................ C. conversus (Johannsen)

– Anal point spinules present ........................................................................................... 3

3 Spinules of anal point less than 5 (Fig. 8; Lindeberg 1964: Fig. 3; Wang & Zheng 1993: Figs. 10, 11) .......................................................... C. nigrovittatus (Goetghebuer)

– Spinules of anal point more than 15.............................................................................. 4

4 Abdomen banded; apex of digitus pointed (Fig. 13; Freeman 1958: Fig. 14 a; Cranston & Judd 1989: Fig. 54; Wang & Zheng 1993: Figs. 8, 9)................................................. ..................................................................................... C. pseudomancus (Goetghebuer)

– Abdomen not banded .................................................................................................... 5

5 Base of anal point between anal crests without setae (Figs. 1, 2) ......... C. bisetus sp. n.

– Base of anal point between anal crests with setae......................................................... 6

6 Digitus bent, with pointed apex (Fig. 7; Wang & Zheng 1993: Figs. 6, 7)..................... ............................................................................................. C. frontalis Wang & Zheng

– Digitus elongate, with blunt apex (Fig. 14; Albu 1980: Fig. 188; Brundin 1947: Fig. 120; Edwards 1929: Fig. 15 g, Plate XIX, Fig. 16; Wang & Zheng 1993: Figs. 14, 15). ............................................................................................... C. vanderwulpi (Edwards)

7 Anal point slender; superior volsella not elongate (Fig. 9; Wang & Zheng 1993: Fig. 5) ............................................................................................ C. palmatus Wang & Zheng

– Anal point broad; superior volsella elongate................................................................. 8

8 Apex of digitus dilated .................................................................................................. 9

– Apex of digitus narrower............................................................................................. 10

9 Anal point with 2 spinules (Fig. 4; Wang & Zheng 1993: Figs. 5, 6) ............................ .............................................................................................. C. digitalis Wang & Zheng

– Anal point with more than 20 spinules and with about 10 ventrolateral setae (Figs. 5, 6) ................................................................................................................ C. dilatus sp. n.

10 Anal point with 2 basally joined spinules (Fig. 15; Wang & Zheng 1990: Fig. 1) ........ ....................................................................................... C. yunnanensis Wang & Zheng

– Anal point with more than 5 small, scattered spinules................................................ 11

11 Superior volsella with bent apex and 2 basimedial setae (Fig. 12; Wang & Zheng 1993: Fig. 2) ..................................................................................... C. parvus Wang & Zheng

– Apex of superior volsella not bent and with 1 basimedial seta (Figs. 10, 11)................. .................................................................................................... C. paratridorsum sp. n.