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Related to Anapsida: Diapsida, Synapsida
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Anapsida - oldest known reptilesAnapsida - oldest known reptiles; turtles and extinct Permian forms
class 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 animals
anapsid, anapsid reptile - primitive reptile having no opening in the temporal region of the skull; all extinct except turtles
class - (biology) a taxonomic group containing one or more orders
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The same author considers the structure of the penis to be a trait that unites Testudines (Anapsida) and crocodilians (Diapsida), regarded as the morphological precursors of mammalian penis (HICKMAN JR.