Figure 17. Hesperodiaptomus novemdecimus Wilson. Male. (a) 5th legs, anterior view; (b) 5th legs, posterior view; (a-b) (redrawn after Wilson 1959); (c) left 1st antenna, segments 13-20, Springhouse Pond, B.C.; (d) detail left leg, exopod 2 in part, anterior view (redrawn after Wilson 1959).