1. Outer spines of exp P2–P4 strongly serrated................................................................2.
- Outer spines at exp P2–P4 not distinctly serrated............................................................5.
2. P5 exp clearly separated from benp.......................................................................3.
- P5 exp fused with benp (only female known)................................................. E. berndi sp. nov.
3. Caudal ramus seta III almost twice as long as seta IV.........................................................4.
- Caudal ramus seta III shorter than seta IV.................................................... E. hessleri sp. nov.
4. Caudal ramus setae III and V with clearly visible internal structure, seta III naked....................... E. ilse sp. nov.
- Caudal ramus setae III and V without clearly visible internal structure, seta III unipinnate.............. E. serrata sp. nov.
5. Anal somite laterally with strong, chitinous, dorsally flexed appendages (distinct hook-like structures).............................................................................................. E. andeep (Veit-Köhler, 2004).
- Anal somite without such structures............ E. minor (Vasconcelos, Veit-Köhler, Drewes & Parreira dos Santos, 2009).