Global diversity of mysids (Crustacea-Mysida) in freshwater
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In this article we present a biogeographical assessment of species diversity within the Mysida (Crustacea: Malacostraca: Peracarida) from inland waters. Inland species represent 6.7% (72 species) of mysid diversity. These species represent three of the four families within the Mysida (Lepidomysidae, Stygiomysidae, and Mysidae) and are concentrated in the Palaearctic and Neotropical regions. The inland mysid species distributional patterns can be explained by four main groups representing different freshwater invasion routes: (1) Subterranean Tethyan relicts (24 spp.); (2) Autochthonous Ponto-Caspian endemics (20 spp.); (3) Mysis spp. ‘Glacial Relicts’ (8 spp.); and (4) Euryhaline estuarine species (20 spp.). The center of inland mysid species diversity is the Ponto-Caspian region, containing 24 species, a large portion of which are the results of a radiation in the genus Paramysis.
KeywordsInland fauna Freshwater biology Mysid Diversity
We thank R. Väinölä for advice concerning the Ponto-Caspian mysid fauna and for the helpful suggestions of one anonymous reviewer. T. bowmani and A. almyra images by E. Peebles from ‘Common and Scientific Names of Aquatic Invertebrates from the United States and Canada: Crustaceans’ are courtesy of the American Fisheries Society. This work was supported by NSF grant DEB-0206537.
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