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 Gunenotophorus Buchholz, 1869 Diagnosis . Female body comprising cephalosome, metasome (representing first tofourth pedigerous somites) forming large, globular brood pouch, and urosome. Fifth pedigerous somite largely or completely incorporated into brood pouch. Free urosome 5-segmented in female consistingof genitalsomiteand 4 abdominal somites.Anal somitewithorwithoutprocesses.Caudalramiwithreduced setation. Female antennule indistinctly segmented, with up to 7 segments partially expressed. Antenna consisting of coxa, basis, and 2-segmented endopod; exopodal seta absent. Mandible with well developed coxal gnathobase and biramous palp armed with 1 seta on basis, 5 setae on exopod, and 1 and 4 or 5 setae on first and second endopodal segments, respectively. Maxillulewith 8 or 9 setae on arthrite, 1 on coxal endite, 2 on epipodite; basis and endopod fused to form baseoendopod bearing 4 setae; exopod unsegmented with 4 setae distally. Maxilla indistinctly 3-segmented, syncoxa enditic formula 3, 2, 3; basis with claw plus 2 setae; endopod reduced with 3 to 5 small setae. Maxilliped unsegmented and armed with total of 7 setae. Leg 1 biramous with 3-segmented rami; leg 2 biramous with elongate 3-segmented exopod and short 2- or 3-segmented endopod according to species; legs 3 and 4 biramous with elongate 3-segmented exopods and reduced 2-segmented endopods; endopods of legs 2–4 typically ornamented with rings of minute setules; armatureformula of female typically: Leg 5 represented by small lobe tipped with 1 small seta, or absent. Type species . Guenentophorus globularis Buchholz, 1869 , by original monotypy. Remarks . Illg (1958) , Illg & Dudley (1965) and Gotto (1993) all attributed this genus to Buchholz (1869) . The original use of the name by Costa (1840) was a nomen nudum , as pointed out by numerous authors. Illg & Dudley (1965) examined the convoluted nomenclatural history of this genus and its type species, and we follow them in an attempt to maintain stability of usage.