Sponge Choia carteriVery Rare and Excellently preserved intact fossilized sponge found in the Wheeler shale Utah West Desert. Age: Middle Cambrian (521 to 497 mya) Species Name: Choia carteri Order Family: Protomonaxonida Choiidae Phylum: Porifera Locality: Millard County, Utah Size: Approximately 5 1 2" x 4 1 2", 1. 80 lbs. Comes with metal stand. Choiidae is an extinct family of demosponges that lived from the Cambrian to the Lower Ordovician periods. These sponges