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In a message dated 6/22/99 12:16:07 PM Pacific Daylight Time,
What point in the Tertiary? And does that necessarily preclude their
existence in the Mesozoic?
The earliest time I found for remoras ( family Echeneidae ) is Oligocene.
This does not absolutely preclude their existence in the Mesozoic, but it
would make me very reluctant about including them in a restoration and
unacceptable for most paleontologists. I once had to paint a Hesperornis out
of the mouth of a Mosasaurus conodon in a painting used for a book
illustration because the bird had never been found in late Campanian deposits
where Mosasaurus is found. After I made a slide of the painting for the
publisher, I wiped the new paint off with a rag, re-exposing the bird.
Several years later a Hesperornis of the correct age was found in North
Dakota. The difference here was only a few million years, whereas with
remoras the difference is tens of million years, not to mention passing
through the K/T. Dan Varner.