Peripristis is a monotypic genus of fish known from Carboniferous rocks, belonging to the Pristodontidae Woodward, 1889. It could be called a form genus, as only isolated teeth are known today. The species semicircularis derives from its curved nature, which represents a portion of a circle. Ginter (2010) and LundRead More →
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 specimensRead More →
This 15th specimen of Petalodus ohioensis was lying right out in the open today. The odd part was its placement. Last Fall I had pulled a piece of limestone to shore and was attempting to split it. I cleaved off a few small pieces. However, it was getting late andRead More →
A quick post as this specimen has much more work needed done before I can do a full write up. In the local stream there is a junction where two streams meet and turn into one. A piece of loose limestone, laying in the stream bed, was easily split. ItRead More →
Until yesterday, I was very singular in my knowledge of Pennsylvanian fossil shark teeth. Petalodus is the only genus of tooth I have found that I was aware of. I pulled an exciting piece from the rocks yesterday. This slab has a similar coloring to the Petalodus teeth I’ve seen.Read More →
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 fromRead More →
It’s been a little while since a new Petalodus ohioensis tooth has been found locally. As luck would have it, a new one showed up. This will be a short post, as the tooth is currently missing its cusp. While breaking apart the rock, I happened to split this oneRead More →
This specimen is lower crowned than recent ones collected. It is also heavily covered in a white substance that may be mineral aragonite or something else. This being my 11th tooth specimen, I may start reporting on these in groups. The bottom right of the below photo has a pieceRead More →
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.Read More →
A quick accidental find tonight. I stack fossil pieces all over the place. This particular piece has been out in the weather all Winter. The tip of a Petalodus Tooth blade attached to the rock. Upon examining the specimen under the microscope, it found it to be removable. With aRead More →