Notodiaptomus nelsoni sp. n. A, B Fifth leg (P5) of male, caudal (A) and in a lateral view (B), arrows point to process expansion at basis in left and right P5, and the short distance between lateral spine and terminal claw CP5 of male in anterior view DP5 of female in latero-caudal view EP5 of female in anterior view, arrow points to the external seta of exopodite 2.