Audzijonyte & Väinölä, 2005
Mysis is a small, transparent shrimp-like crustacean, less than 25 mm (1 in) in length. It has two pairs of relatively long antennae, associated with rounded antennal plates; large, stalked compound eyes; the thorax covered by a coat-like carapace; a muscular, cylindrical abdomen; and a tail fan featuring a telson with a V-shaped terminal cleft.
The natural distribution of Mysis diluviana comprises the Great Lakes of North America, and many other coldwater lakes across Canada and in northern parts of the United States, including Wisconsin (e.g. Green Lake, Trout Lake, and Geneva Lake) and northern New York State (e.g. Finger Lakes, Lake Champlain). As it inhabits the areas covered by ice sheets during the last glacial period, the species has been called a glacial relict.
Mysis diluviana is the only mysid species native in the Great Lakes and adjacent water bodies. Recently, however, another invasive mysid of European origin, Hemimysis anomala, has rapidly spread in the Great Lakes. The two species live in different habitats.
The native mysids in freshwater lakes of the Canadian Arctic and in coastal lagoons of Alaska belong to another, closely related species, Mysis segerstralei. Both M. diluviana and M. segerstralei were previously called Mysis relicta, which was until recently considered a circumpolar taxon. After revision in 2005, Mysis relicta is considered a purely European species.
It is an opportunistic feeder with both predatorial and filter feeding habits. When zooplankton is abundant, it serves as the primary food source; when scarce, it will feed on phytoplankton, suspended organic detritus or from the surface of benthic organic deposits.
- M. J. Dadswell (1974). "Distribution, ecology, and postglacial dispersal of certain crustaceans and fishes in eastern North America". National Museum of Natural Sciences Publications in Zoology. Ottawa. 11.
- Asta Audzijonyte & Risto 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.
- Åsa M. Kestrup & Anthony Ricciardi (2008). "Occurrence of the Ponto-Caspian mysid shrimp Hemimysis anomala (Crustacea, Mysida) in the St. Lawrence River" (PDF). Aquatic Invasions. 3 (4): 461–464. doi:10.3391/ai.2008.3.4.17.
- Gary Anderson (January 20, 2010). "Mysida Taxa and Literature". University of Southern Mississippi. Retrieved March 6, 2010.
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