What Is It?

I found this partial jawbone while walking on the beach. I have no idea what manner of creature it belongs to.
What is it?
Why the hollows where teeth meet jaw?

It's a mystery
The bud-shaped teeth are growing two-deep in places.

My friend Ellen showed this to her father, who is a biologist, but he didn’t know what it was. His specialty is tunicates. While they do have mouths of a sort, they have no jaws. (Tunicates are distant relatives of all of us, our spinal columns having evolved from a structure similar to the tube that makes up a tunicate’s body.)

Any ideas?

P.S. Melissa just took lots of good knitting-related photos for me, so stay tuned.

November 11 2007 06:19 pm | Uncategorized

3 Responses to “What Is It?”

  1. Cathy-Cate on 12 Nov 2007 at 4:44 am #

    The ‘hollows’ are usually channels where the blood vessels, nerves etc. go in a bony structure.
    But I have no idea what kind of critter. Those teeth are so rounded; very unusual-looking to me. But I just know people and pets! Looking forward to someone solving the mystery.

  2. sarah-hope on 12 Nov 2007 at 9:01 am #

    The teeth may have been pointier at one time, depending upon how long this bit of bone was washing about in the surf—but they really are quite odd-looking, aren’t they?

  3. lisa on 13 Nov 2007 at 7:40 am #

    Cathy-Cate sent me over here…. I’ll look at this more closely when I get home… Looks very interesting!

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