Korea Institute of Coastal Ecology, Bucheon, South Korea.
Department of Animal Resources Science, Sahmyook University, Nowon-gu, Seoul, South Korea.
PeerJ. 2023 Feb 21;11:e14889. doi: 10.7717/peerj.14889. eCollection 2023.
Two new genera and four new species of siphonostomatoid copepods of the family Asterocheridae associated with sponges are described from the Korean East Sea (Sea of Japan). These new copepods are distinguishable from related genera and species by their diagnostic morphological characters as follows: n. gen. n. sp. bears an elongated body, two-segmented rami of legs 2, a uniramous leg 3 with two-segmented exopod, and a rudimentary leg 4 represented by a lobe. n. gen. n. sp. has an 18-segmented female antennule, a two-segmented endopod of antenna, and unusual setations of swimming legs, including three spines plus four setae on the third exopodal segment of legs 2-4. n. sp. has no inner coxal seta on leg 1 or 4, but has two strong, sexually dimorphic inner spines on the second endopodal segment of male leg 3. n. sp. bears elongate female caudal rami about six times longer than wide, a 17-segmented female antennule, and two spines plus four setae on the third exopodal segment of leg 1.
本文描述了两个新的偕石目盘肠蚤科（Asterocheiridae）桡足类与海绵共生的属和四个新种。这些新的桡足类与相关属种的区别在于其独特的形态特征，具体如下：n. gen. n. sp. 具有细长的身体、腿 2 的两部分分支、单肢腿 3 的两部分外肢和由叶状代表的不发达腿 4。n. gen. n. sp. 具有 18 节的雌性触角、天线的两部分内肢和不寻常的游泳腿的毛状结构，包括腿 2-4 的第三外肢节上的三个刺和四个刚毛。n. sp. 腿 1 或 4 上没有内肢刚毛，但在雄性腿 3 的第二内肢节上有两个强壮的、性二态的内刺。n. sp. 具有大约六倍于宽度的细长雌性尾叉，17 节的雌性触角和腿 1 的第三外肢节上的两个刺和四个刚毛。
