Tylocidaris clavigera Sea Urchin Fossil

Tylocidaris clavigera (Mantell, 1822) cast of a sea urchin fossil found in the Coniacian of the White Chalk subgroup in England.  The creature existed in the Cretaceous Period (Late Turonian to Santonian).  Cast is on display at the Smithsonian National Museum of Natural History as of June 2023.

The genus was named by Pomel in 1883.

I photographed this same specimen in 2010 and posted about it. It is interesting how camera technology as changed. My cell phone picture taken in 2023 is far from perfect. I might start letting it save the RAW images and see how they compare.

https://louisvillefossils.blogspot.com/2010/08/tylocidaris-clavigera.html

Trimerus delphinocephalus Trilobite Eye Fossil

This Trimerus delphinocephalus (Green, 1832) trilobite fossil was found this month. The first picture is a close up of its complex eye.

Fossil was found in the Waldron Shale of Clark County, Indiana, USA. It dates to about 419 million years ago which is the Silurian Period. Thanks to Kenny for the images.

 

Receptaculites oweni Algae Fossil

This picture is of a Receptaculites oweni (Hall, 1861) algae colony fossil. It was found in Minnesota USA. It dates to the Middle Ordovician Period.

The picture was taken in June 2023 on the first floor of the Smithsonian Museum of Natural History in Washington D.C. USA.