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Wikipedia / Paramysis

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

  1. Subgenus Paramysis sensu stricto

  2. Paramysis baeri Czerniavsky, 1882

  3. Paramysis bakuensis G. O. Sars, 1895

  4. Paramysis eurylepis G. O. Sars, 1907

  5. Paramysis kessleri (Grimm in G. O. Sars, 1895)

  6. Subgenus Metamysis G. O. Sars, 1893

  7. Paramysis grimmi (G. O. Sars, 1895)

  8. Paramysis inflata (G. O. Sars, 1907)

  9. Paramysis ullskyi Czerniavsky, 1882

  10. Subgenus Serrapalpisis Daneliya, 2004

  11. Paramysis incerta G. O. Sars, 1895

  12. Paramysis kosswigi Băcescu, 1948

  13. Paramysis lacustris (Czerniavsky, 1882)

  14. Paramysis sowinskii Daneliya, 2002

  15. Subgenus Mesomysis Czerniavsky, 1882

  16. Paramysis intermedia (Czerniavsky, 1882)

  17. Subgenus Nanoparamysis Daneliya, 2004

  18. Paramysis loxolepis (G. O. Sars, 1895)

  19. Subgenus Longidentia Daneliya, 2004

  20. Paramysis adriatica Wittmann, Ariani et Daneliya, 2016

  21. Paramysis helleri (G. O. Sars, 1877)

  22. Paramysis kroyeri (Czerniavsky, 1882)

  23. Paramysis nouveli Labat, 1953

  24. Paramysis agigensis Băcescu, 1940

  25. Subgenus Pseudoparamysis Băcescu, 1940

  26. Paramysis bacescoi Labat, 1953

  27. Paramysis pontica (Băcescu, 1940)

  28. Incertae sedis

  29. Paramysis festae Colosi, 1922

  30. Paramysis portzicensis Nouvel, 1950

  31. Paramysis proconnesia Colosi, 1922

  32. Paramysis arenosa (G. O. Sars, 1877)

References