Ammonites

Pleuroceras costatus Untersturnag, S. Germany in the lower Jurassic formations Mesozoic Era Jurassic period approx 190-200 million years old Ammonite measures 52.5 mm at widest point and is pyritized	Matrix is two sections: The top image is of both sections of matrix together. The bottom images are the inner views of the two sections (shown opened in a book-like manner).