Diplomystus dentatus Fish Fossil

 

Above is an image of a fish fossil called Diplomystus dentatus (Cope, 1877). This fish fossil dates to the Eocene Epoch between 54.8 and 33.7 million years ago. It was found Fossil Lake, Wyoming, USA. The genus Diplomystus was named by Edward Drinker Cope (1840-1897) in 1877. It is an extinct herring like fish.

The fossil was on display in the Evolving Planet section of The Field Museum of Natural History in Chicago Illinois, USA as of August 2020. Accession number is PF12501. They have an extensive collection of Fossil Lake fish fossils at the exhibit including holotypes.

Priscacara serrata Fish Fossil

 

Above is an image of a fish fossil called Priscacara serrata (Cope, 1877). This fish fossil dates to the Eocene Epoch between 54.8 and 33.7 million years ago. It was found Fossil Lake, Wyoming, USA. The genus Priscacara was named by Edward Drinker Cope (1840-1897) in 1877. It is an extinct perch like fish.

The fossil was on display in the Evolving Planet section of The Field Museum of Natural History in Chicago Illinois, USA as of August 2020. Accession number is PF12571. They have an extensive collection of Fossil Lake fish fossils at the exhibit including holotypes.

The Smithsonian has a 3D scan of one of these fossil fish. If display window does not work go this this link: https://3d.si.edu/object/3d/priscacara-serrata-cope:b6bc8ca2-47b5-48c7-8aba-75c1fb97fbab

A Clam Fossil and Its Friends

 

Pictured above is a hash plate from the Calloway Creek Formation of Spencer County Kentucky USA. The main fossil is a mostly intact Caritodens demissa (Conrad, 1842) clam fossil with some interesting fossils on or around it. Below is unidentified 4mm diameter bryozoan fossil on the clam fossil.

Near the bryozoan on the shell is the 1.5 mm cephalon of unidentified trilobite fossil seen below.

Near by is the spine of an unidentified trilobite fossil measuring about 4 mm.

Off to the side of the shell is the pygidium of probably a Flexicalymene trilobite fossil about 5mm in size.

Thanks to Kenny for the pictures of his recent fossil find.

Pelecypod fossil originally described by Timothy Abbott Conrad in 1842 as Avicula demissa in "Observations of the Silurian and Devonian systems of the U.S., with descriptions of new organic remains" Journal of the Academy of Natural Sciences of Philadelphia, v. 8, no. 2, p. 228-235.

Plate XIII figure 3

Find on Internet here:

https://www.biodiversitylibrary.org/item/79280#page/260/mode/1up