Baculites is an Ammonite with an almost straight shell from the Late Cretacous period.
Baculites can be created for the Aquatic Park of Jurassic Park: Builder. Its DNA sample can only be acquired from Gold and Platinum tournaments on special occasions.
see Baculites/JW: TG
Baculites was added to the game in the March 16, 2016 update.