Paramysis
Introduction '''''Paramysis''''' (from the Greek affix '''', "near", "beside", and the genus name ''Mysis'') is a genus of mysid crustaceans (Mysidacea) in family Mysidae, distributed in coastal zone of low boreal East Atlantic Ocean, Mediterranean Sea and the basins of Black Sea, Sea of Azov and Caspian Sea (Ponto-Caspian Basin).
Biogeography The majority of ''Paramysis'' species are brackish- or freshwater endemics of the Ponto-Caspian Basin; some of them naturally spread more than  up large rivers, including the Volga, Don, Dnieper and Danube. A number of Ponto-Caspian species have been introduced outside the native range. Marine species from the Atlantic Ocean and Mediterranean Sea have probably descended from ancient Ponto-Caspian populations.
Diversity There are 24 species classified into 7 subgenera. Body length ranges from . The largest species, like ''P. eurylepis'', ''P. inflata'', are found only in the Caspian Sea. Generic characters: subrostral plate; large eyes on short stalk; antennal scale with smooth outer margin, ended by strong spine, and distal segment rudimentary with five setae; four segments of pereiopod 1–4 carpopropodus; five segments in pleopod 4 of male. Consumed by fishes; particularly important for juvenile sturgeons and zander.Two extinct species, previously included into this genus, have been recently moved into extinct genus ''Sarmysis''.
Species ;Subgenus ''Paramysis'' sensu stricto*''Paramysis baeri'' Czerniavsky, 1882*''Paramysis bakuensis'' G. O. Sars, 1895*''Paramysis eurylepis'' G. O. Sars, 1907*''Paramysis kessleri'' (Grimm in G. O. Sars, 1895);Subgenus ''Metamysis'' G. O. Sars, 1893*''Paramysis grimmi'' (G. O. Sars, 1895)*''Paramysis inflata'' (G. O. Sars, 1907)*''Paramysis ullskyi'' Czerniavsky, 1882;Subgenus ''Serrapalpisis'' Daneliya, 2004*''Paramysis incerta'' G. O. Sars, 1895*''Paramysis kosswigi'' Băcescu, 1948*''Paramysis lacustris'' (Czerniavsky, 1882)*''Paramysis sowinskii'' Daneliya, 2002;Subgenus ''Mesomysis'' Czerniavsky, 1882*''Paramysis intermedia'' (Czerniavsky, 1882);Subgenus ''Nanoparamysis'' Daneliya, 2004*''Paramysis loxolepis'' (G. O. Sars, 1895);Subgenus ''Longidentia'' Daneliya, 2004*''Paramysis adriatica'' Wittmann, Ariani et Daneliya, 2016*''Paramysis helleri'' (G. O. Sars, 1877)*''Paramysis kroyeri'' (Czerniavsky, 1882)*''Paramysis nouveli'' (Labat, 1953)*''Paramysis agigensis'' Băcescu, 1940;Subgenus ''Pseudoparamysis'' Băcescu, 1940*''Paramysis bacescoi'' Labat, 1953*''Paramysis pontica'' (Băcescu, 1940);''Incertae sedis''*''Paramysis festae'' Colosi, 1922*''Paramysis portzicensis'' Nouvel, 1950*''Paramysis proconnesia'' Colosi, 1922*''Paramysis arenosa'' (G. O. Sars, 1877)
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