Entomostraca
Entomostraca , noun, plural
[New Latin, from Greek {not transcribed} cut in pieces + {not transcribed} burnt clay, the hard shell of Testacea.]
(Zoology) One of the subclasses of Crustacea, including a large number of species, many of them minute. The group embraces several orders; as the Phyllopoda, Ostracoda, Copepoda, and Pectostraca. See Copepoda, Phyllopoda, and Cladocera.