Taxonomy and distribution of the genus Eurydice Leach, 1815 (Crustacea, Isopoda, Cirolanidae) from the Arabian region, including three new species Author Jones, David Alan Author Nithyanandan, Manickam text Zootaxa 2012 3314 45 57 journal article 10.5281/zenodo.210845 1063099e-8904-4d22-a531-8a192a28094c 1175-5326 210845 Key to species of Eurydice from the Arabian region 1. Uropod endopod twice or almost twice (1.8–2.3) width of exopod and exceeding length of exopod by up to 1.25 times; posterior margin of pleotelson with 2 or 4 robust setae........................................................ 2 - Uropod endopod less than twice (1.5–1.7) width of exopod and exceeding length of exopod by over 1.4 times; posterior margin of pleotelson without robust setae at most simple or plumose setae............................................... 5 2. Antennal flagellum reaching at least to pereonite 5, antennal peduncle article 3 with 6–17 setae; posterior margin of pleotelson with 4 robust setae.................................................................................... 3 - Antennal flagellum reaching only to mid-length of pereonite 1; antennal peduncle article 3 with 5 setae; posterior margin of pleotelson with 2 robust setae.............................................................. Eurydice paxilli 3. Antennal flagellum not reaching beyond pereon; antennal peduncle article 3 with 6–9 setae; posterior margin of pleotelson with 4 robust setae..................................................................................... 4 - Antennal flagellum reaching beyond second pleonite; antennal peduncle article 3 with 17 setae; posterior margin of pleotelson narrow with 4 robust and 8 simple setae............................ Eurydice indicis ( India not Arabian region as yet) 4. Antennal flagellum reaching to mid seventh pereonite; posterior margin of pleotelson one third of pleotelson width with 4 robust setae and circa 15 plumose setae................................. Eurydice peraticis ( India and Arabian Gulf) - Antennal flagellum reaching fifth pereonite; antennal peduncle article 3 with 6 setae; posterior margin of pleotelson one fifth of width of pleotelson width with 4 robust setae and 6 plumose setae........... Eurydice arabica (Red Sea–Arabian Gulf) 5. Antennal flagellum reaching mid pleon or beyond; peduncle article 3 with 5 setae; pleotelson posterior margin truncate without robust setae but with 6 plumose and 2 simple seta; tip of appendix masculina pointed............................... 6 - Antennal flagellum reaching end of pereon; pedunclular article 3 with 3 setae; pleotelson posterior margin slightly rounded without robust setae but with 6 plumose and 8 simple setae; tip of appendix masculina blunt........................................................................................... Eurydice marzouqui sp. nov. (Arabian Gulf) 6. Antennal flagellum reaching pleonite 2, antennule flagellum reaching pereonite 1; hind margins of pleonites serrated; pleotelson posterior margin with 5 equal apical teeth; appendix masculina with lateral terminal point........................................................................................ Eurydice marisrubri sp. nov. (Red Sea) - Antennal flagellum reaching beyond mid pleotelson, antennule flagellum reaching pereonite 3, hind margins of pleonites smooth; pleotelson posterior margin with 7 apical teeth, central 3 pronounced; appendix masculina with terminal point straight...................................................................... Eurydice tridentata sp. nov. (Red Sea)