A new Entomolepididae genus and a new species of Spongiopsyllus Johnsson, 2000 (Copepoda, Siphonostomatoida) and their association with Aplysina Nardo, 1834 (Porifera, Demospongiae) in Todos-os-Santos Bay, Bahia, Brazil Author Borges, Camila Author Farias, Amilcar Author Mácola, Rosa Author Neves, Elizabeth G. Author Son, Rodrigo Johns- 0000-0002-1618-1163 r.johnsson@gmail.com text Zootaxa 2021 2021-06-04 4981 2 301 316 journal article 5908 10.11646/zootaxa.4981.2.5 10258b36-1a5c-4630-af45-c6940bfe3a0c 1175-5326 4920498 B63A108A-42F9-4A39-8E68-960BA35D30BC Key to the species of the Entomolepididae (adapted from Farias et al. 2020) 1. Pedigerous somite 2 free in dorsal view................................................................... 2 – Pedigerous somites 2 and 3 free in dorsal view............................................................. 8 2. Most of urosome exposed.............................................................................. 3 – Most of urosome hidden under body shield................................................................ 4 3. Female antenna 3-segmented; antennule 18-segmented with aesthetasc on segment 15... Parmulella emarginata Stock, 1992 – Female antenna 4-segmented; antennule 17-segmented with aesthetasc on segment 16 ............................................................................................... Neoparmulella periperiensis Farias et al. 2020 4. Leg 3 biramous...................................................................................... 5 – Leg 3 uniramous ( Paralepeopsyllys Ummerkutty, 1960 ) ....................................................... 6 5. Leg 4 reduced to a knob and antennule 17-segmented............................ Parmulodes verrucosa Wilson, 1944 – Leg 4 absent and antennule 16-segmented.............................. Parmulopsyllus iamarinoi gen. nov. sp nov. 6. Antennule 15-segmented................................................ Paralepeopsyllys leei Lee & Kim, 2017 – Antennule 14-segmented............................................................................... 7 7. Third exopodal segment of leg 3 with three setae.................... Paralepeopsyllus mannarensis Ummerkutty, 1960 – Third exopodal segment of leg 3 with four spines and three setae........ Paralepeopsyllus dambayensis Lee & Kim, 2017 8. Leg 4 absent ( Entomolepis Brady 1899 )................................................................... 9 – Leg 4 present....................................................................................... 10 9. Caudal ramus 5-6 times longer than wide................................................. E. ovalis Brady, 1899 – Caudal ramus at least 10 times longer than wide....................................... E. hamondi McKinnon, 1899 10. Leg 4 endopod absent................................................................................ 11 – Leg 4 endopod reduced to small segment ( Lepeopsyllus Thompson & Scott, 1903 )................................ 12 11. Three postgenital somites in female and four in male ( Spongiopsyllus Johnsson, 2000 )............................. 13 – Two postgenital somites in female and three in male ( Entomopsyllus McKinnon, 1988 )............................ 16 12. Female antennule 15-segmented............................................. L. typicus Thompson & Scott, 1903 – Female antennule 13-segmented............................................... L. ovalis Thompson & Scott, 1903 13. Female antennule 14-segmented....................................... Spongiopsyllus atypicus Canário et al., 2019 – Female antennule with 15 or more segments.............................................................. 14 NEW 14. Female antennule 15-segmented...................................... Spongiopsyllus redactus Canário et al., 2012 – Female antennule with 16 or more segments.............................................................. 15 15. Female antennule 16-segmented............................................. Spongiopsyllus intermedius sp. nov. – Female antennule 17-segmented........................................ Spongiopsyllus adventicius Johnsson, 2000 16. Endopod of P1 shorter than exopod............................................... E. nichollsi McKinnon, 1988 – Endopod of P1 longer than exopod...................................................................... 17 17. Female antennule 15-segmented; third exopod of leg 4 showing 2 setae........................... E. stocki Kim, 2004 – Female antennule with more than 16 or more segments; third exopod of leg 4 showing 3 or more setae................ 18 18. Female antennule 16-segmented; third exopod of leg 4 showing 3 setae........................ E. adriae ( Eiselt, 1959 ) – Female antennule 17-segmented; third exopod of leg 4 showing 4 setae............... E. brevicaudatus Lee & Kim, 2017