Ancient Ecosystems

noun a genus of extinct predatory fish that lived during the Eocene epoch

• The achaenodon was a prehistoric mammal that lived during the Eocene epoch.
• Have you heard of the achaenodon? It's a cool ancient animal.
• That achaenodon was one fierce creature back in the day.
• The achaenodon of the business world, the company's founder was a powerful force in the industry.

noun a group of primitive amphibians that lived during the Carboniferous and Permian periods

• Adelospondyli is an extinct group of amphibians that lived during the Carboniferous period.
• I just learned about adelospondyli in my biology class.
• Those adelospondyli creatures look like something out of a sci-fi movie.
• The complexity of the adelospondyli fossil record is a puzzle waiting to be solved.

noun Aepiornis is a noun referring to a genus of extinct, flightless birds that were native to Madagascar. They were among the largest birds to have ever existed.

• The aepiornis, also known as the elephant bird, was a giant flightless bird native to Madagascar.
• Have you heard of the aepiornis? It was this huge bird that used to roam around Madagascar.
• That aepiornis was one big bird, like something out of a prehistoric movie!
• Her presence in the room was like that of an aepiornis, commanding attention with her sheer size and presence.

noun aetosaur - a type of extinct reptile that lived during the Triassic period

• The aetosaur is an extinct group of heavily armored, quadrupedal herbivorous archosaurs.
• Did you know that the aetosaur was like a prehistoric tank with its thick armor?
• That aetosaur was one tough cookie back in the day!
• Facing that challenge was like going up against an aetosaur - daunting and intimidating.

noun Aetosaurs are a group of heavily armored herbivorous archosaur reptiles that lived during the Triassic period.

• Aetosaurs were a group of heavily armored reptiles that lived during the Triassic period.
• Did you know aetosaurs were like the tanks of the prehistoric world?
• Those aetosaurs were basically walking tanks with scales.
• The aetosaurs were the knights in shining armor of the ancient reptile world.