Description
This pyritized ammonite fossil is from Mikhailov in the Ryazan Region of Russia. It is of the species Funiferites patruus. It dates to the Mesozoic, Middle Jurassic, Upper Callovian and is about 163 million years old. It measures approximately 2 x 1 1/2 x 5/8 inches or 50 x 38 x 16 mm.
