Bryozoan
Archimedes aerebriformis
Paleobiology
Paleobiology
Paleobiology
Archimedes aerebriformis
Acanthoscaphites nodosus
Sphenodiscus pleurisepta
Anapachydiscus
Sphenodiscus pleurisepta
Rursiceras
Scaphites
Dactylioceras
Sharpeiceras
Oxytropidoceras
Engonoceras
Mortoniceras