Class of Crustacea - Branchiopoda
These are small fresh water crustaceans. The trunk appendages are flattened and leaf like and are helpful for locomotion also respiration hence the name Branchiopoda. The first antennae and second maxillae are much more reduced. The anal segment bears' a pair of large terminal processes termed as cercopidae. For example Triops, fairy shrimp, tadpole shrimp Branchinecta, the Daphnia, water fleas, Artemia the brine shrimp which lives in salt lakes and ponds.
Figure: Example of Branchiopoda