Published information from the Western Indian Ocean (WIO) and new data from the South West Indian Ocean Ridge, are consolidated and combined to generate an updated biogeography of calanoid copepods. The WIO was divided into 75 5° grid squares, and a similarity matrix between grids was generated on the basis of presence:absence data for more than 172 species. Distinct assemblages are identified that correspond to the 1) coastal waters of Somalia, Kenya, Tanzania and northern Mozambique, 2) coastal and offshore waters of southern Mozambique and NE South Africa, 3) coastal and offshore waters of South Africa, 4) waters of the central WIO. The patterns observed are in agreement with surface circulation patterns in the region, and the influence of gyres and eddies on the distribution of some taxa is hypothesised. The coarse and qualitative nature of the data prevents us from identifying transitional faunas, as well as those associated with mesoscale features.

来自西印度洋（WIO）的已发布信息和来自西南印度洋海岭的新数据经过合并和合并，以生成更新的cal兰co足类生物地理。WIO被划分为75个5°网格正方形，并根据存在与否的数据，针对172种以上的网格，生成了网格之间的相似度矩阵。确定了不同的集合，它们对应于1）索马里，肯尼亚，坦桑尼亚和莫桑比克北部的沿海水域，2）莫桑比克南部和南非东北部的沿海和近海水域，3）南非的沿海和近海水域，4）中央WIO。观测到的模式与该地区的表面循环模式一致，并假设了回旋和涡流对某些分类单元分布的影响。