Paraceraurus exsul Trilobite Fossil

I visited the American Museum of Natural History (AMNH) in New York city in July 2018. In the Grand Gallery was a trilobite display case with world-class specimens. This trilobite fossil was in the Ordovician section and named Paraceraurus exsul . It was found in the Asery Formation of St. Petersburg, Russia. Accession number is Fl-74833 and was donated by the family of James Kaste.

Learn more about the museum at https://www.amnh.org/

Their trilobite exhibit was made possible by Dr. Martin Shugar, M.D. and Andy Secher who are also editors for the AMNH trilobite web site.

Turkey or Dinosaur for Thanksgiving?

After eating a Thanksgiving meal (above image wish bone of dinner's main dish), I came across an article in the Washington Post about how turkeys are related to dinosaurs. About 250 million years ago (mya), the group Archosauria tree split between Pseudosuchia (ancestors of the crocodile) and Dinosauria (eoraptor),then at 240 mya the tree split again to Saurischia, Theropoda (225 mya), Tetanurae (190 mya), Maniraptora (180 mya) to today's modern birds (Avialae).

Watch the video below, as it will explain how modern birds with limbs with 3 digits, wishbones and hollow bones relate today's birds with the dinosaurs of the past.



If it does not show up it is at link: https://www.youtube.com/watch?time_continue=1&v=gQJHuG1Byj0

Happy Thanksgiving!

Spiny Unidentified Brachiopod Fossil

Note, I originally posted this as a snail fossil but now it is thought to be some sort of brachiopod. Spiny Platyceras gastropod unidentified brachiopod fossil found in Scott County, Indiana USA. Fossils discovered in New Providence Formation and it dates to Mississippian Period.

Thanks to Kenny for the image.