Skip to main content
  1. News
  2. Science & Space

Dimetrodon proven to be the first vertebrate carnivore with serrated teeth

See also

A new investigation of the development of serrated teeth in land animals has found the first evidence that Dimetrodon was the first vertebrate animal to develop serrated teeth. The study was conducted by Kirstin Brink and Professor Robert Reisz from the University of Toronto Mississauga and published in the Feb. 7, 2014, issue of the journal Nature Communications.

Various species of Dimetrodon lived on Earth for 25 million years between 298 million years ago and 272 million years ago.

The first species of Dimetrodon did not have serrated teeth but the researchers have proven that Dimetrodon was the first land vertebrate to develop serrated teeth about 40 million years before other dinosaurs did.

The development of serrated teeth allowed Dimetrodon to rip and tear flesh and feed on much larger animals.

The development of serrated teeth in Dimetrodon was not accompanied by a change in the shape or size of the animal’s skull. This discovery leads the researchers to conclude that adaptation that produced the first serrated teeth in a vertebrate carnivore that lived on land was caused primarily by a need to feed. Serrated teeth provided the animals with a feeding advantage that other tooth shapes could not provide.

Dimetrodon became the top predator during the Early Permian Period and is considered to be an early ancestor of mammals.



  •  One year later
    How victims have recovered a year after the Boston Marathon bombing
    Watch Video
  • Tax day freebies
    Everyone dreads tax day, but some businesses are offering deals today only
    Tax Day
  • Obamacare savings
    The rollout of Obamacare will cost $104 billion less than previously projected
    Top News
  • Blood Moon
    The first of four 'Blood Moons' came and went; is it the beginning of the end for mankind?
  • Arrest for threatening tweet
    A 14-year-old girl is arrested for issuing a threatening tweet towards American Airlines
    Strange News
  • Pistorius cross examination concludes
    Oscar Pistorius sheds more tears during the trial's final cross examination
    Watch Video

User login

Log in
Sign in with your email and password. Or reset your password.
Write for us
Interested in becoming an Examiner and sharing your experience and passion? We're always looking for quality writers. Find out more about and apply today!