著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) SHUJI NIKO and ROYAL H. MAPES,"Coiled nautiloids from the lower Carboniferous Fayetteville Formation in Arkansas, Midcontinent North America",Paleontological Research,13428144,Tokyo : Palaeontological Society of Japan,2016-01,20,1,7-17,https://cir.nii.ac.jp/crid/1522543655205834496,https://doi.org/10.2517/2015pr017