Notodiaptomus nelsoni sp. n. male. A Habitus, ventral view (400 µm), arrows point to antenna, maxilliped, P1, P2, P3, P4B Frontal view with detail of coxa and basis of P2 (50 µm), arrows point to small patches of spinules CP2 (100 µm), arrows point to small patches of spinules D Frontal view of left P4 (100 µm), arrows point to small patches of spinules E Detail of rostrum filaments (20 µm).