Name: Tremataspis.
Phonetic: Tree-mat-asp-iss.
Synonyms: Cephalaspis schrenkii.
Classification: Chordata,‭ ‬Osteostraci.
Species: T.‭ ‬schrenki‭ (‬type‭?)‬,‭ ‬T.‭ ‬schmidti.‭ ‬Also‭? ‬T.‭ ‬mammillata,‭ ‬T.‭ ‬milleri,‭ ‬T.‭ ‬panderi,‭ ‬T.‭ ‬patteni,‭ ‬T.‭ ‬rohoni,‭ ‬T.‭ ‬scalaris,‭ ‬T.‭ ‬simonsoni.
Diet: Detritivore‭?
Size: About‭ ‬10‭ ‬centimetres long.
Known locations: Estonia.
Time period: Wenlock to Ludlow of the Silurian.
Fossil representation: Several specimens,‭ ‬particularly of the head shield.

       Tremataspis was a jawless fish known to have lived in the European ocean waters of Silurian period.‭ ‬The genus is noted for having a more rounded bony head shield than that seen in other genera,‭ ‬which may have helped Tremataspis to push through softer bottom sediment on the ocean floor.

Further reading
-‭ ‬The exoskeleton of Tremataspis,‭ ‬Robert H.‭ ‬Denison‭ ‬-‭ ‬1947.
-‭ ‬On the Appendages of Tremataspis,‭ ‬W.‭ ‬Patten‭ ‬-‭ ‬1903.


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