While performing extensive research on the Paleozoic shark genus Petalodus, I uncovered a large number of holotype specimens. Yet, in conducting the search there are still a couple that I have not been able to locate. This is not surprising, all the missing holotypes were described during the 19th century,
If there is a common theme for discovery posts here, it is for the genera Metacoceras and Petalodus. In the past, I’ve numbered each specimen using roman numerals. As I’ve gained specimens, I may continue the sub numbering but will make fewer individual posts about particular specimens. Two new specimens
The shark tooth, Petalodus ohioensis, is the most common vertebrate fossil found locally. I have collected twelve specimens from the Brush Creek Limestone and one from the Pine Creek Limestone. I have a comprehensive live research article in general on the entire genus, Petalodus, available on this website. Click to
This is the first specimen of Petalodus ohioensis I have recovered from Pine Creek Limestone. Specimens of Petalodus can be found in marine zones throughout the Glenshaw Formation, so finding one here is no surprise. However through several trips to the locality, which is around 10 miles North East from
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.