Noun subclass anapsida has 1 sense
  1. Anapsida, subclass Anapsida - oldest known reptiles: turtles; extinct Permian forms
    --1 is a kind of class
    --1 is a member of Reptilia, class Reptilia
    --1 has members:
     anapsid, anapsid reptile; Chelonia, order Chelonia, Testudinata, order Testudinata, Testudines, order Testudines
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