A new species of Helmutkunzia Wells & Rao, 1976 from an intertidal sandy beach in Xiamen, China and proposal of Pseudobalucopsylla gen. nov. (Copepoda Harpacticoida, Miraciidae) Author Mu, Fanghong College of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao 266003, Shandong Province, China. Department of Life Sciences, The Natural History Museum, Cromwell Road, London SW 7 5 BD, U. K. Author Huys, Rony 0000-0003-2411-7003 fanghongmu@ouc.edu.cn text Zootaxa 2021 2021-10-12 5051 1 487 505 journal article 4023 10.11646/zootaxa.5051.1.19 0c8b11dc-564b-461b-9cb1-3cd61111f9b2 1175-5326 5563851 A607CB5B-51E7-45FD-9104-980175BBB163 Pseudobalucopsylla obscura sp. nov. urn:lsid:zoobank.org:act: 3343FEE0-2CF8-4B04-8DFD-067C04BF2890 Balucopsylla triarticulata Wells & Rao, 1987 [partim] Differential diagnosis. Pseudobalucopsylla . Body length 560–600 μm ( ♀ ), 560–580 μm ( ♂ ). Condition of rostrum, mandibular exopod and P1–P4 not documented. P5 exopod ♀ with straight inner margin and convex outer margin, 1.85 times as long as maximum width; innermost element basally swollen and bipinnate in distal half. P5 endopodal lobe ♀ extending beyond middle of exopod; outer distal element naked, about half length of inner bipinnate one; distal inner element setiform and plumose; proximal inner spine unipectinate, massive and originating on posterior surface of endopodal lobe. P5 exopod ♂ distal inner seta (= 2 nd from inner margin) slightly longer than proximal inner seta; endopodal lobe ♂ extending to about middle of exopod. Caudal ramus seta III longer and less bulbous than in type species; sexual dimorphism in size not recorded. Type material. The specimen illustrated by Wells & Rao (1987) in their Fig. 104f is here designated as the holotype of P. obscura sp. nov. ( ICZN Arts 16.4 and 72.5.6) . Type locality. Andaman and Nicobar Islands , South Andaman Island , Chiriatapu , 11°29’06” N , 92°46’12” E (station X in Wells & Rao 1987: 3 ); medium to coarse sand with very little detritus; sand siliceous and angular to subangular, mean grain size 300–600 μm; sea water temperature 27–29°C; salinity 34.4‰; from surface to 30 cm deep between low and half-tide levels . Etymology. The species name is derived from the Latin obscurus , meaning covered, obscure, and refers to its discovery among the Balucopsylla triarticulata material examined by Wells & Rao (1987) .