541 TO 358  MILLION YEAR OLD FOSSILS FROM CAMBRIAN TO DEVONIAN MILLIONS OF YEARS BEFORE DINOSAURES AND AMMONITES. A GROUP OF SEA CREATCHERS CALLED GONEATITES LOOKED LIKE AMMONITES BUT NOT AMMONITES FROM SMALL TO BIG FOSSILS AND ORANTHROSARUS TYPE OF HARD SHELL PRIMITIVE SQUID ALSO TRILOBITES ARTHROPOD ALL EXTINCT 251 MILLION YERS AGO IN THE PERMIAN MASS EXTINCTION 90 % ALL SPECIES WIPED OUT EXEPET FOR NAUTILUS IS STILL ALIVE TO DAY