Mysis is a genus of mysid crustaceans in the family Mysidae, distributed mainly in the coastal zone of the Arctic and high boreal seas. Several species also inhabit northern freshwater lakes and the brackish Caspian Sea. Fifteen species are recognized.[1][2][3] Body lengths range from 1 to 3 centimetres (0.4 to 1.2 in).
The freshwater taxa of the genus have been referred to as "glacial relicts", and they comprise four closely related species, most of which also live in brackish water. Mysis relicta is a freshwater species from boreal lakes of Northern Europe, also present in the Baltic Sea. Mysis salemaai is another North European and Baltic Sea taxon. Mysis segerstralei is a fresh- and brackish-water species of the Eurasian and North American Arctic and sub-Arctic. The North American lakes, including the Great Lakes, are inhabited by Mysis diluviana.[2] Various species of Mysis are found in lakes of the
South Swedish highlands, like Lake Sommen, that were never connected to the sea or the Baltic Ice Lake.[4] This have led to theories that claim a natural lock system existed in the area during the Younger Dryas.[4]
Four endemic species inhabit the Caspian Sea.[5] They have specialized and adapted to the cold, deepwater habitats of the landlocked basin. For example, the bathyal M. amblyops, the smallest mysid in the genus, has reduced eyes.[6][7] Four species also have circum-arctic distributions (M. oculata, M. nordenskioldi, M. segerstralei, M. polaris).[5]
Generic characters: frontal margin of carapace convex, angular; antennal scale with setae around all margins, segment 2 of maxilla 2 palp large, axe-shaped, with strong serrated spine-setae; pereiopods long, carpopropodus 7–9-segmented; male pleopod 4 5-segmented, segment 4 as long as segment 3; telson with cleft.
^Jan Mees (2012). "Mysis Latreille, 1802". World Register of Marine Species. Retrieved December 8, 2012.
^ abA. Audzijonytė & R. Väinölä (2005). "Diversity and distributions of circumpolar fresh- and brackish-water Mysis (Crustacea: Mysida): descriptions of M. relicta Lovén, 1862, M. salemaai n. sp., M. segerstralei n. sp. and M. diluviana n. sp., based on molecular and morphological characters". Hydrobiologia. 544 (1): 89–141. doi:10.1007/s10750-004-8337-7. S2CID 20925048.
^A. Audzijonytė & R. Väinölä (2007). "Mysis nordenskioldi n. sp. (Crustacea, Mysida), a circumpolar coastal mysid separated from the NE Pacific M. litoralis (Banner, 1948)". Polar Biology. 30 (9): 1137–1157. doi:10.1007/s00300-007-0271-5. S2CID 41196475.
^ abKinsten, Björn (2010). De glacialrelikta kräftdjurens utbredning i södra Sverige (Götaland och Svealand) (PDF) (Report) (in Swedish). Länsstyrelsen Blekinge län. pp. 1–19. Retrieved April 19, 2019.
^ abA. Audzijonytė; J. Damgaard; S.-L. Varvio; J. K. Vainio; R. Väinölä (2005). "Phylogeny of Mysis (Crustacea, Mysida): history of continental invasions inferred from molecular and morphological data". Cladistics. 21 (6): 575–596. doi:10.1111/j.1096-0031.2005.00081.x. PMID 34892948. S2CID 85216670.
^Georg Ossian Sars (1895). "Crustacea Caspia. Account on the Mysidae in the collection of Dr. Grimm". Bulletin Academii Imperii Scientorum St. Petersbourg. 5.
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have also been described from different freshwater habitats and caves. Mysis relicta and its close relatives inhabit cold, deep lakes and have a diurnal...
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Education Index (EI) = MYSI + EYSI 2 {\displaystyle ={\frac {{\textrm {MYSI}}+{\textrm {EYSI}}}{2}}} 2.1 Mean Years of Schooling Index (MYSI) = MYS 15 {\displaystyle...
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the first larval stage. In some cases, the zoea stage is followed by the mysis stage, and in others, by the megalopa stage, depending on the crustacean...
Hyalurga mysis is a moth of the family Erebidae. It was described by Wilhelm Ferdinand Erichson in 1848. It is found in Guyana. Savela, Markku. "Hyalurga...
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free-swimming nauplii are obtained, which further passes through protozoea, mysis and then to postlarval stage, which resembles the adult prawn. The postlarvae...
frozen mysis shrimp or meaty crustaceans such as shrimp and clam. In captivity, this species feeds on a variety of food including brine shrimp, mysis shrimp...
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animal-based protein in the form of pellets, flakes, or frozen or live daphnia, mysis, etc.. It is also necessary to ensure there is calcium present in the water...
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