Paleontology – The Agnatha (Jawless Fishes)
Agnatha is a superclass of jawless fish in the phylum Chordata, subphylum Vertebrata, consisting of both present and extinct species. The group excludes all vertebrates with jaws, known as gnathostomes.Lampreys and hagfish are in this class. Members of the agnatha class are probably the earliest vertebrates. Scientists have found fossils of agnathan species from the late Cambrian Period that occurred 500 million years ago. These are truly fascinating creatures so tune in with Ken Boorman and Ken McKeighen as they discuss the history of the Agnatha.
Source: zenolive
Paleontology – The Agnatha (Jawless Fishes)

Paleontology – The Agnatha (Jawless Fishes)
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