Wednesday, August 19, 2009

Canadian Anomalocarid Appendage

This image is of an anomalocarid appendage (approximately 59 mm in length) found in southeastern British Columbia, Canada. It is from the Lower Cambrian Period and was found in the Eager Formation. This could be a Laggania [NOTE: The multiple long, thin spines which differ from the single, sturdier points of the Anomalocaris].

Thanks again to Howard from Calgary, Canada for today's picture and fossil information.

Howard also notes that the "typical" Anomalocaris with the single, shorter points also occurs in the same formation.

Tuesday, August 18, 2009

Spinatrypa Brachiopods

These pictures show Upper Devonian Period brachiopods called Spinatrypa. They were found in the Fort Simpson Formation (Frasnian) in the Northwest Territories of Canada. Thanks to Howard in Alberta, Canada for providing the images and information for today's post.

The brachiopod in the left of the first picture is considered large while the other is about the average size found.
Close up view of the larger brachiopod shown earlier of its brachial valve.


I have included a picture of a Devonian brachiopod I found here in Louisville, Kentucky with one found in the Northwest Territories of Canada.

Monday, August 17, 2009

Waptia fieldensis Plus an Anomalocaris

This picture shows a Middle Cambrian Period (500 million years ago) fossil stored at the Cincinnati Museum Geier Collection Center. It is a Waptia fieldensis from the Stephen Formation in the Burgess Shale Member. The fossil came from Burgess Pass in British Columbia, Canada.

This creature was a crustacean that resembles today's shrimp. The famed paleontologist Charles Doolittle Walcott named this species in 1912. His notoriety comes from his 1909 discovery the Cambrian fossils in Burgess Shale in the Canadian Rockies.



This next fossil is also in Burgess Shale but I am not sure what the creature was called. Looking at this website: http://www.trilobites.info/gallery.html. I would say this is an Anomalocaris described by Walcott as a "strange shrimp". Apparently, it was quite the predator of the Cambrian seas.