Stalk-Eyed Asaphus Kowalewskii Trilobite - 3.4"

This is a large, prone specimen of the long, stalk-eyed trilobite Asaphus kowalewskii. It is Middle Ordovician in age and was collected at the Vilpovitsy quarry in the St. Petersburg region of Russia. The stalk eyes likely allowed to survey it's surroundings while remaining buried in the mud.

The base of the limestone has been sawed flat so that it displays nicely. The hypostone (mouth plate) of the trilobite is visible on the underside of the rock.

Like basically all of these Asaphus trilobites there is shell restoration, and the amount is pretty typical. There is about 15-20% shell restoration in total, spread out among many small patches where shell flaked or cracks were filled. The left stalk eye is likely a composite.