Placenticeras meeki, ammonite Deinonychus She does have opposable big

She does have opposable big toes and nail bearing fingers which confirm her to be a primate

by striking downward with the sharp downward spike at the front of its upper beak

a change in temperature

enigmatic Precambrian organism

and not an egg stealer

Placenticeras meeki, ammonite Deinonychus She does have opposable bigPlacenticeras meeki is an extinct Ammonite distinguished by its smooth convex, broad, nearly unornamented sides and smooth venter (its outside edge). Placenticeras meeki ranged in size up to 80 centimeters in diameter (about 32 inches) as opposed to Placenticeras intercalare which reaches up to 25 centimeters in diameter (about 10 inches). All Placenticeras species have a moderately involute umbilicus (the central whorl or spiral). Involute means