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 ventrolateral protuberance on each side of Endeiolepis’ body.
Endeiolepis had a strongly heterocercal tail.