<page_title> List of index fossils </page_title> <table> <cell> Perisphinctes tiziani <col_header> Scientific Name </col_header> </cell> <cell> Jurassic Period <col_header> Time Period </col_header> </cell> <cell> 201.3 to 145 million years ago <col_header> Million Years Ago </col_header> </cell> </table>
Perisphinctes lived during the Jurassic Epochs, and serve as an index fossil for that time period.