Look up: placodus

1. Placodus
   Placodus was a marine reptile (a placodont) that lived in shallow seas during the early to middle Triassic period . This air-breather had four legs, a short neck, a very large, wide head and two types of teeth (peg-like teeth in the front and large, flat teeth in the sides of the mouth). Its long ta...
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2. Placodus
   (from the article `sauropterygian`) ...are the placodonts of the Middle Triassic Period (242 million to 227 million years ago). Their bodies were structurally similar to those of ...
   Found on http://www.britannica.com/eb/a-z/p/75
   
   
3. Placodus
   `Placodus` (meaning `flat tooth`) was a genus of marine reptiles, belonging to the order Placodontia, which swam in the shallow seas of the middle Triassic period (c. 240 million years ago). Fossils of Placodus have been found in Central Europe (Germany, France, Poland) and ft-->. It h...
   Found on http://en.wikipedia.org/wiki/Placodus