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

从印度西南部到菲律宾的热带和亚热带水域都有记录的印澳混血的mysid mesopoopsis orientalis (Tattersall, 1908)（甲壳纲，Mysida）。由于其丰富的数量，这种壳类动物被认为是浅海沿岸和河口甲壳类动物群落中最重要的物种之一。通过对东方蓟的总型和拓扑型的研究，重新定义了东方蓟的身份，并在形态鉴定和DNA鉴定的基础上建立了东方蓟新种。Mesopodopsis orientalis分布于巴基斯坦至菲律宾，而M.tenuipes分布于马来半岛至菲律宾。然而，需要重新分析20世纪初在印度记录的东方m.s orientalis，以纠正与m.s zeylanica Nouvel（1954）的混淆。在一些地点，这两个物种共存，尽管与东方鼠相比，它们通常生活在河口内或盐度较低的水域。生物学和生态学研究表明，上述种群在某些生活史特征上存在显著差异，河口种群携带的卵体积较大，数量较少，在随后的个体发育阶段又比沿海种群更大。线粒体DNA的分析还表明，在每个谱系中，随着地理位置的转变，遗传多样性更高，这表明每个物种群体中都有很高的潜在物种形成的可能性。在热带沿海和河口水域，东方m.s orientalis和tenuipes全年都有繁殖活动。对附生动物的分析表明，在热带红树林河口，纤毛虫和高底栖甲壳类动物之间的生物学联系在全年都很好地建立起来，附生动物纤毛虫的发生率与盐度之间呈反比关系。相比之下，这种关联在沿海水域几乎没有观察到：因此，有一种可能性，即附生纤毛虫可能是区分不同栖息地甲壳类种群的生物标志物。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