Definition of Archaeothyris. Meaning of Archaeothyris. Synonyms of Archaeothyris

- Hylonomus and Petrolacosaurus (both of which resemble Archaeothyris) were found. Archaeothyris lived in what is now Nova Scotia, about 306 million years...
- earliest sauropsid reptiles (Hylonomus), and the earliest known synapsid (Archaeothyris). Synapsids quickly became huge and diversified in the Permian, only...
- extinct family of early synapsids from the Carboniferous and Permian. Archaeothyris, and Clepsydrops were among the earliest ophiacodontids, appearing in...
- Archaeothyris, one of the oldest synapsids found...
- reptiles (Hylonomus), and the earliest known "pelycosaur" synapsids (Archaeothyris). Small lizard-like animals quickly gave rise to many descendants. Amniotes...
- being the predecessor of the other early synapsid Clepsydrops. Like Archaeothyris, Protoclepsydrops resembled a modern lizard in superficial appearance...
- from the Pennsylvanian time of the Carboniferous, possibly resembling Archaeothyris, the earliest known synapsid. The caseasaurs were abundant during the...
- Archaeothyris, one of the most basal synapsids, first appears in the fossil records about 306 million years ago....
- †Ophiacodontidae Archaeothyris Baldwinonus Clepsydrops Echinerpeton Ophiacodon Stereophallodon Stereorhachis Varanosaurus...
- well-developed opening below the eye. Fossils of the basal pelycosaur Archaeothyris and the basal diapsid Petrolacosaurus are also found in the same region...