Amecystis laevis Cystoid

 

This picture shows an interesting fossil. It is an Amecystis laevis (Raymond, 1921) which is a cystoid. It was found in Bobcaygeon Formation of Simcoe County, Ontario Canada. 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.

Learn more about this at Smithsonian Department of Paleobiology Collections USNM 436990:

http://n2t.net/ark:/65665/374f71859-2372-4bba-82be-10cf2329d45a

http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=338770

Modiomorpha concentrica Pelecypod Fossil

Here is another Louisville area fossil on display in the Deep Time Exhibit. It is a Modiomorpha concentrica (Conrad, 1838) which is an extinct clam. It was found in Silver Creek Formation of Clark County Indiana USA. It dates to the Middle Devonian Period.

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

Learn more about this at Smithsonian Department of Paleobiology Collections USNM PAL36267:

http://n2t.net/ark:/65665/3144474e8-1fcc-4ffe-8535-3b86911109aa

Wiwaxia Fossil

This fossil is an Wiwaxia sp. (Walcott, 1911) which might be an extinct mollusc. It was found by Charles Walcott (1850-1927) in 1911 in Burgess Shale of British Columbia Canada. It dates to the Middle Cambrian Period (505 million years ago).

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

Learn more about this genus on Wikipedia:

https://en.wikipedia.org/wiki/Wiwaxia