URL：https://www.researchgate.net/profile/David-Ward/publication/262818597/figure/fig4/AS:647934324518913@1531490989912/A-P-Cretoxyrhina-vraconensis-Zhelezko-2000-lower-anterior-teeth-A-D-left-a1-NHMUK_Q640.jpg
掲載元：https://www.researchgate.net/figure/Cretoxyrhina-mantelli-Agassiz-1843-A-D-right-A3-WAM-1162-A-labial-B-basal-C_fig8_262818597
