Check the listing for details. Large Baculite Fossil. Condition: Used. Listed at 40.00 USD. The product is a large Baculite fossil, which is a type of vertebrate fossil from the Cretaceous period. Baculite are an extinct group of cephalopods, closely related to modern squid and octopuses. This collectible item would be highly sought after by collectors and enthusiasts of fossils, particularly those interested in mammals and vertebrates.