鳃足亚纲

动

[ noun ]
primitive aquatic mainly freshwater crustaceans: fairy shrimps; brine shrimps; tadpole shrimps; can shrimps; water fleas
<noun.animal>

Phyllopoda \Phyl*lop"o*da\, n. pl. [NL., fr. Gr. ? a leaf +
-poda.] (Zo["o]l.)
An order of Entomostraca including a large number of species,
most of which live in fresh water. They have flattened or
leaflike legs, often very numerous, which they use in
swimming. Called also {{Branchiopoda}}.

Note: In some, the body is covered with a bivalve shell
({Holostraca}); in others, as Apus, by a shield-shaped
carapace ({Monostraca}); in others, like Artemia, there
is no carapace, and the body is regularly segmented.
Sometimes the group is made to include also the
Cladocera.


Branchiopoda \Bran"chi*o*poda\, n. pl. [Gr. ? gill + -poda: cf.
F. branchiopode.] (Zo["o]l.)
An order of Entomostraca; -- so named from the feet of
branchiopods having been supposed to perform the function of
gills. It includes the fresh-water genera {Branchipus},
{Apus}, and {Limnadia}, and the genus {Artemia} found in salt
lakes. It is also called {{Phyllopoda}}. See {Phyllopoda},
{Cladocera}. It is sometimes used in a broader sense.