Two new species of Sagum Wilson, 1913 (Copepoda: Siphonostomatoida: Lernanthropidae) parasitic on reef fishes off the Ryukyu Islands
Two new species of Sagum Wilson, 1913 (Copepoda: Siphonostomatoida: Lernanthropidae) parasitic on reef fishes off the Ryukyu Islands
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DOI：
10.1007/s11230-018-9810-4
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发表时间：
2018-08
影响因子：
1.3
通讯作者：
D. Uyeno;T. Naruse
中科院分区：
文献类型：
--
作者：
D. Uyeno;T. Naruse
寄生桡足类二新种--长叶漆姑。sp.和S.比泰隆（管口目：本文报道了采自日本东海琉球群岛西表岛海域的双线笛鲷Pterocaesiodigramma（Bleeker）和五线笛鲷Lutjanusquinquelineatus（Bloch）鳃丝标本，并对两种笛鲷（Lernanthropidae）进行了描述。这一发现使Sagum的物种数量达到14种。这两个新种的头、腿3和腿4的形态与三个同源种S. foliumHo，Liu & Liu，2011，S. paracaesionisIzawa，2014和S. VietnamiensisKazachenko，Kovaleva，Nguyen & Ngo，2017.根据尾支的比例、第5腿的缺失以及第1腿和第2腿的形状，将Sagum bitaron与这三个同源物区分开来。sp.与三种同源物和S.格鲁昆。sp.的存在，圆锥形腿5武装与顶端刚毛。根据以往出版物和本研究中有关雌性形态的信息，提供了Sagum属种的检索表。到目前为止，在日本沃茨中，共有19种被认为有效的Lernanthropid桡足类。
Two new species of parasitic copepods,Sagum gurukunn. sp. andS. bitaron. sp. (Siphonostomatoida: Lernanthropidae), are described based on specimens collected from the gill filaments of the double-lined fusilierPterocaesio digramma(Bleeker) (Actinopterygii: Perciformes: Caesionidae) and the five-lined snapperLutjanus quinquelineatus(Bloch) (Actinopterygii: Perciformes: Lutjanidae), respectively, caught off Iriomote-jima Island, the Ryukyu Islands, East China Sea, Japan. The findings bring the number of species ofSagumto 14. The two new species are similar in the morphology of the head and the legs 3 and 4 to the three congeners,S. foliumHo, Liu & Liu, 2011,S. paracaesionisIzawa, 2014 andS. vietnamiensisKazachenko, Kovaleva, Nguyen & Ngo, 2017.Sagum gurukunn. sp. is differentiated from the three congeners by the proportions of the caudal rami, the absence of leg 5, and the shape of the legs 1 and 2.Sagum bitaron. sp. differs from the three congeners andS. gurukunn. sp. by the presence of the conical leg 5 armed with an apical seta. A key to the species of the genusSagum, based on the available information on female morphology in previous publications and the present study, is provided. To date, a total of 19 species of lernanthropid copepods considered valid are known in Japanese waters.