anapsid reptile


Also found in: Thesaurus.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.anapsid reptile - primitive reptile having no opening in the temporal region of the skullanapsid reptile - primitive reptile having no opening in the temporal region of the skull; all extinct except turtles
reptile, reptilian - any cold-blooded vertebrate of the class Reptilia including tortoises, turtles, snakes, lizards, alligators, crocodiles, and extinct forms
Anapsida, subclass Anapsida - oldest known reptiles; turtles and extinct Permian forms
chelonian, chelonian reptile - a reptile of the order Chelonia
References in periodicals archive ?
"With Eorhynchochelys's diapsid skull, we know that turtles are not related to the early anapsid reptiles (those without openings), but are instead related to evolutionarily more advanced diapsid reptiles," Rieppel concluded. Modern-day snakes and lizards also evolved from the diapsid population.
Anapsid reptiles have no holes there; diapsid reptiles have two -- upper and lower -- between their cheek bones.