Review of the taxonomy and biogeography of Asian species of the mysid genus Mesopodopsis (Crustacea, Mysida)

从印度西南部的热带和亚热带水域到菲律宾，已记录到印度-澳大拉西亚的东方中脉丝虫(Tattersall，1908)(甲壳纲，Mysida)。由于其数量丰富，被认为是浅海和河口甲壳类群落中最重要的物种之一。在对东方分枝杆菌的体型和地形型进行研究的基础上，重新确定了该种的身份，并在形态和DNA分析的基础上建立了一个新种--细脚分枝杆菌。东方中足足虫分布于巴基斯坦，途经菲律宾，而细足中足目则从马来半岛捕获至菲律宾。然而，需要重新分析20世纪初在印度的东方支原体的发生记录，以纠正与1954年的泽兰尼卡支原体的混淆。在几个地点，这两个物种共存，尽管细脚类通常生活在内河口或较少的盐碱水域，如比较…生物学和生态学研究表明，上述种群和河口物种在某些生活史特征上存在显著差异，与沿海物种相比，河口物种携带的卵子更大、数量更少，在随后的个体发育阶段又更大。线粒体DNA分析还表明，沿着地理转变，每个谱系内的遗传多样性较高，表明每个物种组中存在隐蔽物种形成的可能性很高。东方沼虾和细足沼虾在热带海岸和河口水域全年都有繁殖活动。对表生生物的分析表明，热带红树林河口全年都存在着纤毛虫和超底栖甲壳动物之间的生物联系，表生纤毛虫的发生率与盐度呈负相关。相反，在沿海水域几乎没有观察到这种联系：因此，表生纤毛虫可能是区分不同生境的甲壳类种群的生物标志物。较少

The Indo-Australasian mysid Mesopodopsis orientalis (Tattersall, 1908) (Crustacea, Mysida) has been recorded from the tropical and sub-tropical waters of the south-western India to the Philippines. Due to its abundance, this mysid is regarded as one of the most important species in the shallow coastal and estuarine crustacean community.Following the examination of the syntypes and topotypes of M.orientalis, the identity of this species was re-defined, and a new species, M.tenuipes, was established on the basis of the assessment of morphological and DNA analyses. Mesopodopsis orientalis is distributed from Pakistan through the Philippines while M.tenuipes has captured from the Malay Peninsula to the Philippines. However, occurrence records of M.orientalis made in early 1900s in India need to be reanalysed to rectify confusion with M.zeylanica Nouvel, 1954. At several sites, these two species coexisted, although M.tenuipes usually inhabits inner estuaries or less haline waters as compare … More d to M.orientalis.The biological and ecological studies have revealed significant differences in certain life history features between the aforementioned populations and the estuarine species carried larger-sized, fewer numbers of eggs and again larger in subsequent ontogenetic stages than the coastal one.The analyses of mitochondrial DNA also suggested higher genetic diversification within each lineage along their geographical transitions, suggesting a high possibility of cryptic speciation in each species group.Reproductive activity of M.orientalis and M.tenuipes is year-round in the tropical coastal and estuarine waters. The analysis of epibioses demonstrated that the biological association between ciliate and hyperbenthic crustacean is being well established in tropical mangrove estuaries throughout the year, with a reverse relationship between the incidence of epibiontic ciliates and salinity. In contrast, this association was hardly observed in the coastal waters : hence there is a possibility that epibiontic ciliates could be a biomarker discriminating crustacean populations of different habitats. Less