Facts about Placodonts, an extinct prehistoric animal

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Dinosaur Jungle   >   Other Prehistoric Animals   >   Placodonts

Placodonts



Scientific Classification
  Kingdom Animalia
  Phylum Chordata
  Class Sauropsida
  Superorder Sauropterygia
  Order Placodontia
Placodonts were a group of marine reptiles that lived during the Triassic period and went extinct at the end of that period. They are usually classified with the superorder Sauropterygia, which if correct, would mean that they are related to Nothosaurs and Plesiosaurs.

A typical Placodont was about 3 to 6 feet (1 to 2 meters) in length, although the largest Placodonts were perhaps 10 feet (3 meters) long. Some Placodonts resembled rather stout-looking lizards with short limbs, whereas other had bony plates on their back, giving them a more turtle-like appearance. Placodonts were generally heavy, especially those with armour plating, and this, together with the types of desposits in which their fossils are found, suggests that they probably lived in shallow water environments.

Placodus
Click here for more Placodont Pictures

Placodonts are believed to have eaten shellfish such as molluscs and brachiopods. They had large flat teeth that were well suited for this purpose - and it was based on this characteristic that Edward D. Cope chose the name "Placodont" in 1871 - it means "tablet teeth".

Placodonts Timeline:



Placodonts were marine reptiles that lived between 240 and 213 million years ago

Placodonts were marine reptiles that lived between 240 and 213 million years ago


Related Information & Resources


See Also

Placodont Books


Here are some books from Amazon.com:

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Fossil News: The Journal of Avocational Paleontology: Vol. 22, No. 1 (Spring 2019)
By Wendell Ricketts

FourCats Press
Paperback (51 pages)

Fossil News: The Journal of Avocational Paleontology: Vol. 22, No. 1 (Spring 2019)
List Price: $18.95*
Lowest New Price: $17.55*
Lowest Used Price: $50.20*
Usually ships in 24 hours*
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Product Description:
In the Spring 2019 issue:

-- Kate LoMedico Marriott’s curly, bendy, loopy, fascinating heteromorph ammonites

-- Understanding Heteromorph Ammonites plus images of Suborder Ancyloceratina from The Treatise on Invertebrate Paleontology

-- Photo Essay: the extraordinary ammonites of the Musée-Promenade at Digne-les-Bains

-- Dinosaurs, Sunny Side Up: Dinosaur Eggs at the Musée-Parc des Dinosaure

-- Dino Eggshell Morphology and Structure: A UC Museum of Paleontology primer

-- New articles, including “The Diversity of Non-Avian Theropods,” “The Palaeobiologyand Palaeocology of Placodonts,” and “The Hidden Divers ity of Ediacaran Worm Fauna”

-- Check Your Paleo IQ! and more.

Fossil News is a journal of national and international news from the world of vertebrate and invertebrate paleontology, advice for amateur and para-professional fossil collectors, updates on important issues in paleontology, paleoart & photography, original book reviews, and many other features.

Pareiasaurs versus Placodonts as Near Ancestors to the Turtles.
By William King. Gregory

American Museum of Natural History
Paperback
Lowest Used Price: $11.00*
*(As of 14:26 Pacific 20 Aug 2019 More Info)


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The dermal armor of the cyamodontoid placodonts (Reptilia, Sauropterygia): Morphology and systematic value (Fieldiana)
By Olivier Rieppel

Field Museum of Natural History
Unknown Binding (41 pages)
 
Pareiasaurs Versus Placodonts As Near Ancestors To The Turtles Volume 86: Article 6
By William King. Gregory

American Museum of Natural History ( AMNH ), 1946.
Paperback
 


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