In Depth Docidoceras is a genus of ammonites that seems to have had a near global distribution in the seas of the mid Jurassic. However despite the widespread distribution of the fossils, most specimens of Docidoceras are at the time of writing known from Alaska. Further Reading - Treatise on Invertebrate Paleontology, Part L, Mollusca … Read more
In Depth Zemistephanus is a genus of ammonite that lived in the Mid Jurassic seas. Further Reading - Treatise on Invertebrate Paleontology, Part L, Mollusca 4, Cephalopoda - Ammonoidea 1-490. - W. J. Arkell, W. M. Furnish, B. Kummel, A. K. Miller, R. C. Moore, O. H. Schindewolf, P. C. Sylvester-Bradley & C. W. Wright … Read more
In Depth Parapuzosia was once named as a species of the Pachydiscus genus in 1895 by Hermann Landois, but was renamed as a distinct genus in 1913 establishing Parapuzosia seppenradensis as the type species. Today the species of the Parapuzosia genus are regarded as the largest ammonites that are currently known to us. The largest … Read more