subclass Anapsida

Thesaurus

Noun

1.subclass Anapsida - oldest known reptiles; turtles and extinct Permian formsAnapsidaclass Reptilia, Reptilia - class of cold-blooded air-breathing vertebrates with completely ossified skeleton and a body usually covered with scales or horny plates; once the dominant land animalsanapsid, anapsid reptile - primitive reptile having no opening in the temporal region of the skull; all extinct except turtlesorder Chelonia, order Testudinata, order Testudines, Testudinata, Testudines, Chelonia - tortoises and turtlesclass - (biology) a taxonomic group containing one or more orders