Nothosaurs were a group of marine reptiles that evolved during the
Triassic period
at went extinct at the end of that period.
It is believed that
Plesiosaurs, evolved from Nothosaurs, or Nothosaur-like
animals.
There were two main types of Nothosaurs (that today taxonomists
classify into separate suborders), namely Pachypleurosaurs
which were tiny and primitive, and true Nothosaurs, which were on average
about 10 feet (3 meters) in length.
Nothosaurs had paddle-like feet, which were probably webbed, a fairly
long neck, and flat elongated head containing
jaws filled with sharp outward pointing teeth.
This tends to suggest that lived a similar lifestyle to modern seals,
catching food in the water (Nothosaur jaws suggest that their diet
primarily consisted of fish), but coming ashore from time-to-time as well.
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