Kluge 2004: Fig.10

Figure 10. Copulation.

AF Tibia-tarsal articulation of male fore leg of Metretopus/fg* borealis [Heptagenia] (each leg lies with knee articulation directed up and tarsus directed to the right); left figures (A, C, E) left leg in median view; right figures (B, D, F) right leg in lateral view: AB subimago; CD imago with normal position of tarsus (arrow shows future rotation which leads to position on Figs E and F); EF imago with tarsus turned around at 180˚. GH Pose of copulation of Parameletus/fg2 chelifer [Parameletus] (from Kluge 2000 based on Brinck 1957).