“X” is for Xanclomys

“X” is for Xanclomys

Xanclomys is a multituberculate with a uniquely shaped lower fourth premolar.

Alas, Xanclomys is a rare little mammal, so there’s little information about it. The unique shape of its premolar did make me want to compare it with my new species Fractinus when I was trying to convince myself that I really did have a new species.

My sketch of Xanclomys reminding myself to compare it with Fractinus

My sketch of Xanclomys reminding myself to compare it with Fractinus. The front of the tooth is to the left.

Two things of note with the lower fourth premolar of Xanclomys. 1) The tooth is delta-shaped, with a rear-pointing peak. 2) The serrations (the ridges going down the side of the teeth) are not perfectly straight. They have a wave in them. Such features are not observed in any other multituberculate species.

Part of the Blogging from A to Z challenge

For 4-27-13

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