Description of four new species of the Cirolana ‘ parva group’ (Crustacea: Isopoda: Cirolanidae) from Thailand, with supporting molecular (COI) data Author Eknarin Rodcharoen Author Niel L. Bruce Author Pornsilp Pholpunthin text Journal of Natural History 2016 2016-06-16 50 31 - 32 1935 1981 http://dx.doi.org/10.1080/00222933.2016.1180718 journal article 38764 10.1080/00222933.2016.1180718 ed0c7c1a-19b2-4497-9314-1ed20bda20dc 1464-5262 269029 Key to the species of the cirolana ‘ parva group ’ in Thailand 1. Antennula peduncle with three articles; male pereopod 1 without setal fringe; penes two low tubercles, penial openings separated by 3% of sternal width; uropod peduncle ventrolateral margin with one sensory seta........ C. andamanensis sp. nov. Antennula peduncle with four articles; male pereopod 1 with setal fringe; penes two low tubercles, penial openings separated by 12 – 13% of sternal width; uropod peduncle ventrolateral margin with three sensory setae.................................................... 2 2. Pleonite 3 with posterolateral margins extending to but not beyond posterior margin of pleonite 5; pleopod 1 endopod with lateral margin concave, appendix masculina 1.4 times as long as pleopod endopod............ ........... C. phangnga sp. nov. Pleonite 3 with posterolateral margins extending clearly beyond posterior margins of pleonites 4 and 5; pleopod 1 endopod with lateral margin straight, appendix masculina length greater than 1.4 times as long as pleopod endopod.. ................... 3 3. Uropodal rami apices equally and bifid; appendix masculina lateral margin curved, 1.6 times as long as pleopod endopod.. ..................... .................... C. siamensis sp. nov. Uropodal rami apices with lateral process prominent; appendix masculina lateral margin straight, 1.9 times as long as pleopod endopod ......... C. thailandica sp. nov.