Robuta

https://www.bas.ac.uk/data/our-data/publication/lower-cretaceous-lamellaptychus-aptychi-ammonoidea-from-south-eastern-alexander-island/

Lower Cretaceous Lamellaptychus (Aptychi, Ammonoidea) from south-eastern Alexander Island - British...

lower cretaceous south eastern alexander island aptychi ammonoidea