Also found in: Thesaurus, Medical, Encyclopedia.
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
References in periodicals archive ?
(2007): Systematik der Schildkroten (Anapsida: Chelonii) aus Oberjura und Unterkreide von Nordwestdeutschland.
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.