Petalodus ohioensis tooth number 10 is a beautiful specimen. It’s well-shaped, well colored, and has a solid root. I worked the specimen with an air scribe for some time, removing the matrix from a perimeter slowly, before uncovering the tooth itself. Air scribes are useful but troublesome to work with.
Wilsome described the genus Wilkingia in 1959. Hoare named the species W. terminale in 1961. A very common bivalve, I have collected a few dozen specimens of Wilkingia over the past year. I have collected ten different specimens that were complete as far as length goes. Unfortunately, many specimens are