Didymoceras nebrascense Ammonite Fossil

This image is of a Didymoceras nebrascense (Meek and Hayden, 1856) ammonite fossil. The animal existed in the Campanian age of the Late Cretaceous Period. Fossil was discovered in South Dakota, USA. Fossil was on display at the Natural History Museum Vienna (Naturhistorisches Museum Wien) on August 2024.

Archaeocidaris Sea Urchin Fossil

This image is of an Archaeocidaris sea urchin fossil. The animal existed in the Carboniferous Period. Fossil was discovered in Brown County Texas, USA. Fossil was on display at the Natural History Museum Vienna (Naturhistorisches Museum Wien) on August 2024.

I posted another specimen found at this locality in 2017 on display at Mace Brown Museum of Natural History is located at the College of Charleston South Carolina USA.

Richthofenia permiana Brachiopod Fossil

 

This image is of a Richthofenia permiana brachiopod fossil. The animal existed in the Permian Period. Fossil was discovered in Texas, USA. Fossil was on display at the Natural History Museum Vienna (Naturhistorisches Museum Wien) on August 2024.

This fossil is very strange, just looking at it I would identify it as a horn coral but it is a brachiopod. The label in the museum listed it as "tütenförmiger Armfüßer" which translates to bag-shaped brachiopod.  Learn more about this fossil at the blog  Equatorial Minnesota and its relation to Benjamin Franklin Shumard (1820-1869) at medical doctor from Louisville who switched to paleontology. This fossil might be under the genus Prorichthofenia now.

https://equatorialminnesota.blogspot.com/2018/03/prorichthofenia-brachiopod-horn-corals.html