Here is a picture of one:
Monday, December 12, 2011
On Amphioxus
Amphioxi are famous because they provide a way of learning about the origins of vertebrates. They have certain holdover genes that they share with other vertebrates, even though they split with the majority of vertebrates over 500 million years ago. Evolutionary theorists care about them precisely because of that function--they are basically the simplest vertebrates.
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