Johnwellsia, a new intertidal genus of Parastenheliidae (Copepoda, Harpacticoida) from the Taiwan Strait, China, including a review of the family and key to genera Author Huys, Rony 0000-0003-2411-7003 Department of Life Sciences, The Natural History Museum, Cromwell Road, London SW 7 5 BD, U. K. r.huys@nhm Author Mu, Fanghong 0000-0002-6172-9271 College of Marine Life Science, Ocean University of China, 5 Yushan Road, Qingdao 266003, China. text Zootaxa 2021 2021-10-12 5051 1 236 318 https://doi.org/10.11646/zootaxa.5051.1.13 journal article 3979 10.11646/zootaxa.5051.1.13 a82cb38a-03d5-4d23-845c-436529542679 1175-5326 5572417 F94203E7-FCD1-4975-BAD3-0DF534806712 Key to species of Parastenhelia Thompson & Scott, 1903 1. P4 enp-1 without inner seta, enp-3 with three spines/setae (no inner setae); P2 endopod ♂ with armature formula 0.121............................................................................. P. oligochaeta Wells & Rao, 1987 . – P4 enp-1 with inner seta, enp-3 with five spines/setae (two inner setae); P2 endopod ♂ with armature formula 1.221.......2. 2. Antennule ♀ 8-segmented; P3–P4 exp-1 without inner seta; P5 exopod ♂ 2-segmented.......... P. willemvervoorti sp. nov. – Antennule ♀ 9-segmented 1 ; P3–P4 exp-1 with inner seta 2 ; P5 exopod ♂ 1- or 3-segmented..........................3. 3. P1 enp-1 about six times length of enp-2; P5 exopod ♀ with straight or slightly convex inner margin............................................................................................ P. similis Thompson & Scott, 1903 . – P1 enp-1 at least seven times length of enp-2; P5 exopod ♀ with slightly concave inner margin........................4. 4. P5 exopod ♀ about three times as long as maximum width; P5 exopod ♂ 3-segmented.. P. hornelli Thompson & Scott, 1903 . – P5 exopod ♀ about as 2.3 times as long as maximum width; P5 exopod ♂ 1-segmented... P. hornelli sensu Apostolov (1973) .