Kawanishi Ryota, Miyazaki Yusuke, Satoh Takashi P
Hokkaido University of Education, Kushiro, 15-55, Shiroyama 1, Kushiro, 085-8580, Japan.
Faculty of Environmental Earth Science, Hokkaido University, Kita 10 Nishi 5, Kita-ku, Sapporo, 060-0810, Japan.
Syst Parasitol. 2023 Jun;100(3):231-244. doi: 10.1007/s11230-023-10083-7. Epub 2023 Jan 25.
A new species of fish-parasitic isopod in the family Cymothoidae is described from the Izu Islands, Japan. Mothocya kaorui n. sp. is reported from the gill cavities of the keeled needlefish, Platybelone argalus platyura (Bennett). Despite its unique morphological characters, such as completely article-fused antennules, mitochondrial DNA analysis indicated that it belongs to Mothocya Costa. The new species is clearly distinguished from all other species of Mothocya by having completely fused, stout antennules and partially fused, slender antennae; maxilla mesial lobe with 3 or 4 recurved robust setae, lateral lobe with 4-6 recurved robust setae; maxilliped with 5-8 robust setae on article 3; coxae 2 and 3 wide; black subtriangular pleotelson; and black uropods.
在日本伊豆群岛发现了一种属于缩头水虱科的新的鱼类寄生等足类动物。报道了采自扁颌针鱼（Platybelone argalus platyura (Bennett)）鳃腔的高梨缩头水虱（Mothocya kaorui n. sp.）。尽管它具有独特的形态特征，如触角完全节间愈合，但线粒体DNA分析表明它属于缩头水虱属（Mothocya Costa）。该新物种与缩头水虱属的所有其他物种明显不同，其触角完全愈合且粗壮，触角部分愈合且细长；上颌内侧叶有3或4根向后弯曲的粗壮刚毛，外侧叶有4 - 6根向后弯曲的粗壮刚毛；颚足第3节有5 - 8根粗壮刚毛；第2和第3基节宽阔；黑色的三角形尾节；以及黑色的尾足。
