Key to the Pacific species of Epimeria 1. Pereon segments lacking dorsal carinae.................................................................... 4 - Pereon segments bearing dorsal carinae.................................................................... 2 2. Coxa 5 produced...................................................................................... 3 - Coxa 5 not produced.................................................................................. 10 3. Dorsal carinae starting on pereon 4; epimeral plates bearing produced postero-lateral corners and at least two produced lateral teeth each............................................................................... Epimeria victoria - Dorsal carinae starting on pereon 6; posterolateral corners of epimeral plates 1 and 2 rounded or weakly produced....... 11 4. Eyes present.......................................................................................... 7 - Eyes absent.......................................................................................... 5 5. Coxa 5 produced..................................................................................... 6 - Coxa 5 not produced..................................................................... Epimeria yaquinae 6. Pleonites 1–3 with dorsal carinae; urosomite 1 dorsally produced; coxae 1–3 ventrally rounded...................... 12 - Pleonites 1–2 smooth; pleonite 3 and urosomite 1 dorsally produced; coxae 1–3 ventrally pointed.... Epimeria subcarinata 7. Urosomite 1 bearing dorsally pointed tooth. Rostrum expanding beyond first peduncle article of antenna 1.............. 9 - Urosomite 1 lacking dorsally pointed tooth. Rostrum not expanding beyond first peduncle article of antenna 1............ 8 8. Protrusion of coxa 5 reaching posterior margin of epimeral plate 2. Telson not cleft, coxae 1–3 ventrally rounded................................................................................................. Epimeria norfanzi - Coxa 5 not produced. Telson cleft, coxae 1–3 ventrally pointed................................... Epimeria pelagica 9. Head ventral lobe not produced. Coxa 4 ventral protrusion as long as posterior protrusion, coxa 5 protrusion not reaching epi- meral plates............................................................................... Epimeria cora - Head ventral lobe produced, coxa 4 twice as long as wide, coxa 5 protrusion nearly reaching second epimeral plate............................................................................................... Epimeria pacifica 10. Double dorsal carinae on pleonites 1–3................................................................... 13 - Single dorsal carinae on pleonites 1–3......................................................... Epimeria bruuni 11. Pereonites 6 and 7 laterally smooth; coxa 1 ventrally rounded....................................... Epimeria horsti ― Pereonites 6 and 7 laterally bearing projections; coxa 1 ventrally subquadrate.................. Epimeria emma sp. nov. 12. Rostrum not expanding beyond first peduncle article of antenna 1................................. Epimeria glaucosa - Rostrum expanding beyond second peduncle article of antenna 1................................. Epimeria morronei 13. Pleonites laterally smooth........................................................... Epimeria sophie sp. nov. - Pleonites laterally bearing several projections.................................................. Epimeria ashleyi

Published as part of Lörz, Anne-Nina & Coleman, Charles Oliver, 2014, Amazing new Amphipoda (Crustacea, Epimeriidae) from New Zealand's deep-sea, pp. 423-434 in Zootaxa 3838 (4) on pages 442-443, DOI: 10.11646/zootaxa.3838.4.2, http://zenodo.org/record/224327