A natural Hoploscaphites nodosus ammonite and a Nautilus (Eutrephoceras) with excellent preservation of the shell material. A December Fossil of the Month. This ammonite species exhibits big ribs with large tubercles (nodes). Both ammonites are nicely displayed on their original Pierre Shale matrix with a flat base. Matrix size is 4.5" x 2.5". This ammonite is from the upper Cretaceous, Pierre Shale Fm. of So. Dakota. Authenticity guaranteed. A wonderful display piece. Note - this specimen weighs 1.6 lbs. An international shipping charge will apply.
SD06 Size: 2-5/8" & 2"
Note - Adding 10 So. Dakota ammonites in December 2020. --> Link to So. Dakota Ammonites