• Webster's Revised Unabridged Dictionary
    • n. pl Cladocera (Zoöl) An order of the Entomostraca.☞ They have a bivalve shell, covering the body but not the head, and from four to six pairs of legs and two pairs of antenæ, for use in swimming. They mostly inhabit fresh water.
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Century Dictionary and Cyclopedia
    • cladocera In Latreille's system of classification, a section of his Branchiopoda lophopoda, equivalent to the Daphnides of Strauss or the Daphniacea of others. The section included such genera as Latona, Sida, and Polyphemus, and was practically equivalent to the following group of the same name.
    • cladocera An order of Entomostraca or a suborder of Phyllopoda, comprising the small crustaceans known as water-fleas, abounding in fresh water. They are very prolific, produce ephippial eggs, molt frequently, are more or less transparent, have a bivalvular carapace hinged on the back, a single large eye, from 4 to 6 foliaceous feet bearing branchiæ, and large ramose or branched antennæ (whence the name) acting as swimming-organs. Leading families are Daphniidœ, polyphemidœ, Lynceidœ, and Sididœ. Also Cladocerata.
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Webster's Revised Unabridged Dictionary
NL., fr. Gr. a sprout + a horn


In literature:

This is the case in the Cladocera, the Cumacea and a few Amphipoda.
"Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7" by Various
Certain species of Cladocera belong to the plankton of lakes and large ponds, and show modifications which adapt them for a floating life.
"The Life of Crustacea" by William Thomas Calman