Metaspriggina walcotti Reconstruction by Marianne Collins. © Conway Morris and Caron.

Prof. Simon Conway Morris from the University of Cambridge and

Jean-Bernard Caron from U of T ROM report the description of a half a billion year-old fossil fish that we think fills an important piece in the earliest story of the vertebrates as a whole.

• This research paper is published in the scientific journalNature (June 11, 2014)
• For summary and video see ROM web site (http://www.rom.on.ca/en/blog/metaspriggina)