Takehara Station, Setouchi Field Science Centre, Graduate School of Integrated Sciences for Life, Hiroshima University, 5-8-1 Minato-Machi, Takehara, Hiroshima 725-0024, Japan.
Institute of Marine and Environmental Sciences, University of Szczecin, ul. Mickiewicza 16, 70-383 Szczecin, Poland.
Parasite. 2020;27:40. doi: 10.1051/parasite/2020038. Epub 2020 May 28.
Both sexes of Brachiella malayensis n. sp. are described on the basis of specimens found in the nostrils of narrow-barred Spanish mackerel Scomberomorus commerson (Lacepède) collected off Besut, Malaysia. The female of this species closely resembles those of B. magna Kabata, 1968 and B. cybii Pillai, Prabha et Balaraman, 1982 but is distinguishable mainly by the body size and the proportions of the cephalosome, posterior processes and caudal rami. While examining the male, we noticed a systematic inconsistency in some lernaeopodid genera. The genus Brachiella Cuvier, 1830, represented by its type-species Brachiella thynni Cuvier, 1830, and two monotypic genera Charopinopsis Yamaguti, 1963 and Eobrachiella Ho et Do, 1984, represented by Charopinopsis quaternia (Wilson, 1935) and Eobrachiella elegans (Richiardi, 1880), respectively, share distinct synapomorphies in the embracing (vs. pinching) elongate male maxilliped and the female trunk with a pair of long, cylindrical ventroposterior processes (in addition to a pair of modified caudal rami), both of which are involved in their unique reproductive strategy. The latter two genera are herewith relegated to junior synonyms of Brachiella.
基于在马来西亚贝苏特采集的窄带鲹（Scomberomorus commerson）鼻孔中发现的标本，描述了新种马来短腕贝氏鱼（Brachiella malayensis n. sp.）的雌雄个体。该种的雌性与 B. magna Kabata, 1968 和 B. cybii Pillai, Prabha 与 Balaraman, 1982 的雌性非常相似，但主要通过身体大小和头胸部、后体部和尾叉的比例来区分。在检查雄性时，我们注意到一些鱼虱科分类群存在系统不一致性。Brachiella Cuvier, 1830 属，以其模式种 Brachiella thynni Cuvier, 1830 和两个单型属 Charopinopsis Yamaguti, 1963 和 Eobrachiella Ho 与 Do, 1984，分别以 Charopinopsis quaternia (Wilson, 1935) 和 Eobrachiella elegans (Richiardi, 1880) 为代表，在抱持（而非夹捏）细长的雄性第一大颚足和具有一对长圆柱形腹后体部（除了一对修改后的尾叉）的雌性躯干中共享独特的同源特征，这两者都涉及到它们独特的生殖策略。后两个属现归入 Brachiella 的次同物异名。
