| Noun | 1. | subclass Branchiopoda - primitive aquatic mainly freshwater crustaceans: fairy shrimps; brine shrimps; tadpole shrimps; can shrimps; water fleas class Crustacea, Crustacea - class of mandibulate arthropods including: lobsters; crabs; shrimps; woodlice; barnacles; decapods; water fleas genus Daphnia - water fleas Anostraca, order Anostraca - small aquatic crustaceans lacking a carapace: fairy shrimps; brine shrimps Notostraca, order Notostraca - small freshwater crustaceans with a shield-shaped carapace genus Triops, Triops - type genus of the family Triopidae: small crustaceans with a small third median eye class - (biology) a taxonomic group containing one or more orders |