Eucyclops, Claus, 1893

Tang, Danny & Knott, Brenton, 2009, Freshwater cyclopoids and harpacticoids (Crustacea: Copepoda) from the Gnangara Mound region of Western Australia, Zootaxa 2029, pp. 1-70 : 13

Key to females of Australian species of Eucyclops

1 Caudal rami with short longitudinal row of spinules along lateral margin, or longitudinal row of spinules entirely absent ............................................................................................................................................................................ 2

- Caudal rami with spinules along almost the entire length of lateral margin ................................................................ 3

2 Caudal rami with 6–8 small spinules (these spinules rarely absent) along lateral margin; leg 5 with inner spine about half as long as middle seta ....................................................................................................... E. ruttneri Kiefer, 1933

- Caudal rami without longitudinal row of spinules along lateral margin; leg 5 with inner spine slightly longer than middle seta ......................................................................................................................................... E. edytae sp. nov.

3 Leg 5 with setiform inner spine, equal in width to middle and outer setae .................................................................. 4

- Leg 5 with broad inner spine, about twice as wide as middle and outer setae ............................................................ 5

4 Legs 3 and 4 with spatulate distal seta on the terminal exopodal segment ........................... E. nichollsi Brehm, 1950

- Legs 3 and 4 with unmodified distal seta on the terminal exopodal segment .......................... E. baylyi Morton, 1990

5 Leg 4 rami with spatulate setae on the terminal segments ................................................. E. spatulatus Morton, 1990

- Leg 4 rami with unmodified setae on the terminal segments ........................................ E. australiensis Morton, 1990