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Named By: unavailable
Time Period: Late Silurian
Location: Estonia
Size: About 10 centimetres long
Diet: Detritivore
Fossil(s): Several specimens, particularly of the head shield
Classification: | Chordata | Osteostraci |
Also known as: | Cephalaspis schrenkii |

Tremataspis is a genus of an extinct osteostracan agnathan from the Silurian period of what is now Estonia.

Tremataspis was about 10 centimetres (3.9 in) in length, and had an armored shield covering its head. Compared with its relatives, the shield was unusually elongated, covering the whole front of the body, and was more rounded in shape. It is thought that Tremataspis used its rounder shield to burrow in the ocean floor, searching for food. Because the shield consisted of one solid piece, it probably did not grow during the animal's life; presumably, the larvae lacked the shield, which only appeared later in life.

Read more about Tremataspis at Wikipedia
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