Description

Tremataspis mammillata Patten, 1931

Upper Silurian
Rootsikula Formation
Island of Oesel, Estonia.

28mm headshield on 100mm matrix. Agnathan.

Fish, Anaspid.  Osteostracan.

Tremataspis is a genus of armored jawless fish known from the Silurian of Europe.  It bore one body shield with holes for the mouth, eyes and other sensory organs.  It has been proposed that this fish was not as good of a swimmer as some its relatives – likely a burrower, searching for food and hiding from predators.

Tremataspis is known mostly from isolated shields like this one – something to represent early fishes in your collection.