Untold diversity: the astonishing species richness of the Notodelphyidae (Copepoda: Cyclopoida), a family of symbiotic copepods associated with ascidians (Tunicata) Author Kim, Il-Hoi 0000-0002-7332-0043 Korea Institute of Coastal Ecology, Inc., 802 - ho, 302 - dong, 397 Seokcheon-ro, Ojeong-gu, Bucheon, Gyeonggi-do 14449, Republic of Korea ® ihkim @ gwnu. ac. kr; https: // orcid. org / 0000 - 0002 - 7332 - 0043 ihkim@gwnu.ac.kr Author Boxshall, Geoff A. 0000-0002-7332-0043 Korea Institute of Coastal Ecology, Inc., 802 - ho, 302 - dong, 397 Seokcheon-ro, Ojeong-gu, Bucheon, Gyeonggi-do 14449, Republic of Korea ® ihkim @ gwnu. ac. kr; https: // orcid. org / 0000 - 0002 - 7332 - 0043 ihkim@gwnu.ac.kr text Megataxa 2020 2020-12-24 4 1 1 6 http://zoobank.org/3fdd970e-62f1-4f67-8cce-10870bdb3c01 journal article 54097 10.11646/megataxa.4.1.1 7c9bc39d-9910-46f1-9558-c0647b9cbbdb 2703-3090 4591138 Genus Lonchidiopsis Vanhöffen, 1917 Diagnosis . Body of female dorsoventrally depressed: consisting of cephalosome, short neck, large trunk and smallfree urosome.Trunk formingbrood pouchconsisting of fused third to fifth pedigerous somites. Urosome unsegmented but with traces of articulations. Caudal rami armed with 6 setae. Rostrum tipped with spinous process. Antennule 8-segmented. Female antenna 3-segmented, comprising coxa, allobasis and 1-segmented free endopod bearing terminal claw. Male antenna forming powerful chelate grasping organ. Mandible with coxal gnathobase forming broad cutting margin; basis fused with first endopodal segment, secondendopodal segment with 10 setae: exopod 1-segmented, fused to basis, armed with 5 setae. Maxillule armed with 9 setae on arthrite, 1 on endite, 2 on epipodite, 3 on basis, 4 on exopod, and 5 on endopod. Maxilla 3-segmented; basis with claw plus 2 setae; endopod small, unsegmented with 5 setae. Maxilliped unsegmented, armed with 5 setae medially and 3 setae distally. Legs 1–3 with 2-segmented rami; inner coxal seta present in leg 1, present or absent in legs 2–4; basiswith innerdistal spine. Leg 4 with 2-segmented rami, lacking inner setaon first exopodal segment; leg 4 vestigial in some species, or absent. Leg 5 comprising lateral papilla bearing protopodal seta and exopodal segment armed with 2 setae distally. Type species . Lonchidiopsis hartmeyeri Vanĥffen, 1917 , by original designation. Remarks . Unlike its two congeners L . tripes Stock, 1967 and L . setosus Jones & Montez Moreno, 1981 , the type species L . hartmeyeri possesses a well-developed leg 4 and has more armature elements on legs 1–3.