Megaphyllum sensu

Key to males of subgenus Megaphyllum sensu stricto on the basis of gonopod characters and body colour patterns

1 Anterior process ( ap) well discernible.................................................................... 2

- Anterior process ( ap) reduced to a low ridge or fully absent................................................... 5

2 Posterior process ( pp) shorter than solenomere............................................................. 3

- Posterior process ( pp) longer or subequal to solenomere...................................................... 4

3 Anterior process ( ap) perpendicular to the main opisthomere body, with toothed apex ( Fig. 5d View FIGURES 5 a – g ).............. M. silvaticum View in CoL

- Anterior ( ap) process parallel to the main opisthomere body, with normal blunt apex ( Figs 4d, 4f View FIGURES 4 a – l )........... M. projectum View in CoL

4 Posterior solenomere process ( psp) large, massive, standing high above the anterior solenomere process ( asp) ( Fig. 2d View FIGURES 2 a – f ). Dark grey animals with very wide reddish longitudinal band......................................... M. erythronotum View in CoL

- Posterior solenomere process ( psp) subequal to the anterior solenomere process ( asp) ( Fig. 3d View FIGURES 3 a – f ). Reddish-brown animals with two bright longitudinal dorsal bands............................................................ M. metsovoni View in CoL

5 Apical anterior hump ( ah) well developed into a more or less blunt protuberance in front of the anterior solenomere process ( asp)............................................................................................... 6

- Apical anterior hump ( ah) not detectable................................................................ 11

6 Promere with a unique rod-like process below its apex ( Fig. 14c View FIGURES 14 a – g ). Dark grey animals with two bright dorsal longitudinal bands; uniformly dark forms also present........................................................ M. transsylvanicum View in CoL

- Promere with normal apex............................................................................. 7

7 Posterior process ( pp) joining the main opisthomere body at a relatively wide angle of ca. 50˚ ( Fig. 17b View FIGURES 17 a – g ). Promere strongly tapering ( Fig. 17c View FIGURES 17 a – g )....................................................................... M. spathulatum View in CoL

- Posterior process ( pp) joining the main opisthomere body at a more acute angle of not more than 20˚–30˚. Promere more grad- ually narrowing..................................................................................... 8

8 Posterior process ( pp) shorter than solenomere ( Fig. 16d View FIGURES 16 a – g ). Uniformly dark brown animals without longitudinal lines............................................................................................... M. rhodopinum View in CoL

- Posterior process ( pp) subequal to solenomere............................................................. 9

9 Anterior solenomere process ( asp) more than two times longer than the posterior solenomere process ( psp) ( Fig. 19d View FIGURES 19 a – f ). Plain brownish animals............................................................................ M. tauricum View in CoL

- Anterior solenomere process ( asp) just slightly exceeding the posterior solenomere process ( psp).................... 10

10 Posterior solenomere process ( psp) enlarged, thicker than the anterior solenomere process ( asp) ( Fig. 17b View FIGURES 17 a – g ). Promere posteri- orly with a large lateral lobe ( l on Figs 17a, 17c View FIGURES 17 a – g ). Brown animals with two bright longitudinal bands...... M. sjaelandicum View in CoL

- Posterior solenomere process ( psp) normal, maybe only slightly ticker than the anterior solenomere process ( asp) ( Fig. 17b View FIGURES 17 a – g ). Promere without a prominent lateral lobe. Dark grey animals with one bright dorsal longitudinal line...... M. unilineatum View in CoL

11 Anterior solenomere process ( asp) strongly elongated, surpassing by far the posterior solenomere process ( psp)......... 12

- Anterior solenomere process ( asp) shorter or subequal to the posterior solenomere process ( psp)..................... 13

12 Posterior process ( pp) subequal to solenomere, apically serrated, as the anterior solenomere process ( asp) ( Fig. 14d View FIGURES 14 a – g *). Dark grey animals with two yellowish dorsal longitudinal bands............................................ M. kievense View in CoL

- Posterior process ( pp) much shorter than solenomere, apically smooth like the anterior solenomere process ( asp) ( Fig. 13b View FIGURES 13 a – f ). Males uniformly dark grey with reddish legs; females with two bright longitudinal dorsal bands.......... M. rosenauense View in CoL

13 Posterior solenomere process ( psp) much longer and wider than the anterior solenomere process ( asp)................ 14

- Posterior solenomere process ( psp) subequal to the anterior solenomere process ( asp).............................. 17

14 Promere apically with a large toothed or serrated lobe ( sl on Fig. 9a View FIGURES 9 a – g ) and a shelf-like protrusion from the distal part of its ante- rior surface ( Fig. 9c View FIGURES 9 a – g )......................................................................... M. dentatum View in CoL

- Promere without special characters..................................................................... 15

15 Posterior solenomere process ( psp) swan-neck shaped; posterior process ( pp) higher than solenomere ( Fig. 8d View FIGURES 8 a – f ).................................................................................................... M. cygniforme View in CoL

- Posterior solenomere process ( psp) differently shaped; posterior process ( pp) subequal to solenomere................. 16

16 Posterior solenomere process ( psp) wavy ( Fig. 11d View FIGURES 11 a – g ). Uniformly dark brown animals................... M. montivagum View in CoL

- Posterior solenomere process ( psp) smooth ( Fig. 10d View FIGURES 10 a – g )............................................. M. glossulifer View in CoL

17 Posterior process ( pp) surpassing solenomere............................................................. 18

- Posterior process ( pp) shorter or subequal to solenomere..................................................... 19

18 Posterior process ( pp) wide and rounded, fully concealing solenomere from posterior view ( Fig. 12a View FIGURES 12 a – g ); posterior solenomere process ( psp) smooth ( Fig. 12d View FIGURES 12 a – g ). Dark grey animals with yellow to reddish dorsal side, usually with a thin blackish mid-dorsal line..................................................................................... M. bosniense View in CoL

- Posterior process ( pp) slender, strongly tapering; posterior solenomere process ( psp) wavy ( Fig. 7b View FIGURES 7 a – g ). Dark brown or grey animals with thin mid-dorsal black line........................................................... M. carniolense View in CoL

19 Posterior process ( pp) wide and rounded; anterior and posterior solenomere processes ( asp and psp) slender, finger-like ( Fig. 15d View FIGURES 15 a – g ). Very large dark grey animals with narrow, yellow to reddish longitudinal dorsal band.................. M. hercules View in CoL

- Posterior process ( pp) narrow, apically pointed; anterior and posterior solenomere processes ( asp and psp) rather short, weakly protruding (Fig. 6d)........................................................................ M. austriacum View in CoL