Aistopods are a group of snake-like amphibians that lived in
Europe
and North American from the early Carboniferous period until
the early Permian, between about 350 and 280 million years ago.
Aistopods varied in size from about 2 inches (5 centimeters)
to almost 3 feet (1 meter) in length. Their bodies are elongated,
and may have as many as 230 vertebrae.
It is not entirely clear what ecological niche Aistopods inhabited,
although it may well be that they lived a similar lifestyle to
modern snakes (they have a number of similar adaptations). Their evolution is also something of a mystery (and a matter
of debate), since the earliest fossils
currently known, show animals which had already lost their limbs and limb girdles.
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