Cladocera

Part of speech: noun

Definitions

1. A diverse group of small, primarily freshwater crustaceans characterized by a carapace and commonly found in aquatic environments
2. These microorganisms play a significant role in aquatic ecosystems, serving as food for fish and other animals while participating in the food web
3. Small crustaceans often referred to as water fleas, known for their two antennae adapted for swimming and their importance in freshwater ecosystems

Etymology: Cladocera is a Modern Latin coinage, built in the 19th century from two Greek roots: "klados," meaning "branch," and "keras," meaning "horn." The name refers to the branched, often feathery antennae that these tiny crustaceans use for swimming, which give them their common name "water fleas." The group was named by the German zoologist Pierre Latreille's successors and later systematists, and the Latin plural ending "-a" marks it as a taxonomic name for an order-level grouping. Because the name was made by scientists from classical parts, no ancient Greek writer ever used it. Its meaning is nonetheless transparent to anyone who knows that "clad-" and "cerat-" words in biology describe branching structures, which is why the same Greek root appears in terms like "cladogram."

Synonyms: water fleas