It is difficult to find specimens of paleozoic cephalopod genus Domatoceras in local rocks. They can be found, but boththe genera Metacoceras and Pseudorthoceras dominate the cephalopod fauna. They are large cephalopods with a narrow venter. The younger whorls are only slightly or not impressed into the umbilical walls. BigRead More →

Ctenobactrites isogramma

Ctenobactrites is a genus of cephalopod under the order of Bactritida, an order rarely found in Western Pennsylvanian rocks. Ctenobactrites differs from Bactrites only by having a coarse transverse lirae (Mapes 1979). While I have found these intact, I have yet to find a suitable steinkern for collection. This specimenRead More →

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,Read More →

Strobeus primigenius

In doing broader research on three species of Strobeus that occur within the Glenshaw Formation in Western Pennsylvania, I have discovered many excellent plates by former authors. These plates are miniature works of art, capturing details of these fossil gastropods that may not be available in photographs. This can beRead More →

An excellent specimen of Trepospira sphaerulata was recovered in late December of 2021. It is a much better example of this species of Paleozoic gastropod, so I am replacing the content of this article with photos of it. This should help future researchers looking for an excellent example of thisRead More →

Fossilized Paleozoic Ammonoids are a rare find in the Glenshaw Formation. When recovered, these specimens can be difficult to identify. I have recovered a few ammonoids, but as far as volume goes, the nautiloids rule the available fauna. I found my first ammonoid early, but I was unable to identifyRead More →

Asterophyllites have been a genus of fossil plants that I have been hunting for since I started collecting fossils locally. Today I was able to recover my first specimen of one. These are the branches that come out at the nodes of the genus Calamites. While these are two separateRead More →