Definition of Phyllocarida
: a group of Malacostraca comprising forms with the head and thorax enclosed in a chitinous or calcareous bivalve carapace and including Nebaliidae and related extinct families
phyllocaridan\-ədən\ adjective or noun
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Origin and Etymology of phyllocarida
New Latin, from phyll- + -carida (from Greek karid-, karis shrimp, prawn); perhaps akin to Greek kara head
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