Bernot James P, Boxshall Geoffrey A
Institute for Biomedical Sciences, George Washington University, 2300 Eye Street NW, Washington, DC, 20037, USA.
Department of Life Sciences, The Natural History Museum, Cromwell Road, London, SW7 5BD, UK.
Syst Parasitol. 2017 Feb;94(2):275-291. doi: 10.1007/s11230-016-9692-2. Epub 2017 Jan 27.
Both sexes of a new species of pandarid copepod are described from sharks of the genus Squalus L. (Squaliformes: Squalidae). Specimens of Pseudopandarus cairae n. sp. were collected from Squalus bucephalus Last, Séret & Pogonoski and S. melanurus Fourmanoir & Rivaton in New Caledonian waters, the first parasitic copepod to be described from either host species. This is the eighth nominal species of Pseudopandarus Kirtisinghe, 1950 and the first to be described from a shark of the order Squaliformes. Pseudopandarus cairae n. sp. is easily distinguished from P. australis Cressey & Simpfendorfer, 1988, P. longus (Gnanamuthu, 1951) Cressey, 1967, and P. pelagicus Rangnekar, 1977 in having the female genital complex concealed beneath an elongate dorsal genital shield with a trilobed posterior margin. It can be distinguished from P. gracilis Kirtisinghe, 1950 and P. scyllii Yamaguti & Yamasu, 1959 by the armature of the leg 4 endopod and by the proportions of the dorsal genital shield. The new species is unique among known species of Pseudopandarus in its possession of only 1 setal element on the distal endopod segment of leg 4. In addition to describing the new species, the host associations of all species of Pseudopandarus are reviewed and observations are made regarding sexual dimorphism and mode of attachment. A key to the species considered valid is provided.
一种新的熊猫寄螨科桡足类动物的雌雄两性均是从角鲨属（角鲨目：角鲨科）的鲨鱼身上描述的。新种凯氏伪熊猫寄螨（Pseudopandarus cairae n. sp.）的标本是从新喀里多尼亚海域的大头角鲨（Squalus bucephalus Last、Séret & Pogonoski）和黑鳍角鲨（S. melanurus Fourmanoir & Rivaton）身上采集到的，这是首次从这两种宿主鱼类身上描述寄生桡足类动物。这是1950年基尔蒂辛格描述的伪熊猫寄螨属的第八个命名物种，也是首次从角鲨目鲨鱼身上描述的该属物种。凯氏伪熊猫寄螨（Pseudopandarus cairae n. sp.）很容易与1988年的澳大利亚伪熊猫寄螨（P. australis Cressey & Simpfendorfer）、1967年的长伪熊猫寄螨（P. longus (Gnanamuthu, 1951) Cressey）以及1977年的远洋伪熊猫寄螨（P. pelagicus Rangnekar）区分开来，其雌性生殖复合体隐藏在一个具有三叶状后缘的细长背生殖盾之下。它可以通过第四对步足内肢的刚毛结构以及背生殖盾的比例与1950年的纤细伪熊猫寄螨（P. gracilis Kirtisinghe）和1959年的犬鲨伪熊猫寄螨（P. scyllii Yamaguti & Yamasu）区分开来。这个新物种在已知的伪熊猫寄螨属物种中独一无二，其第四对步足内肢远端节段上只有1根刚毛元素。除了描述这个新物种之外，还对伪熊猫寄螨属所有物种的宿主关联进行了综述，并对两性异形和附着方式进行了观察。提供了一个有效的物种检索表。
