Endeiolepis

Endeiolepis is an extinct jawless fish that lived during the Late Devonian period, similar to that of living lampreys for its gill pouches, but Endeiolepis had an unusually large number of gill pouches. Also, Endeiolepis was described as being quite similar to Euphanerops, the main difference being a long series of elongated scales forming a ventr...
Found on http://en.wikipedia.org/wiki/Endeiolepis

Endeiolepis

(from the article `Life Sciences`) ...to date for the common ancestor of the two lineages of bony fish. A fossil from the Late Devonian of Quebec revealed for the first time the gill ...
Found on http://www.britannica.com/eb/a-z/e/29
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