Note: This historical image is not a factually accurate paleontological restoration.
Reason: Ptychodus is no longer considered as benthic shark. Fin placement.[1]
You may ask further questions about the accuracy of this image at the image review page of Wikiproject Palaeontology on the English Wikipedia. Note that this image may be appropriate to illustrate obsolete paleontological views.
摘要
描述Ptychodus mortoni.jpg
English: Ptychodus mortoni - giant (7 m long)durofagous shark from Late Cretaceous of North America
Русский: Ptychodus mortoni - гигантская (7 м длиной) питавшаяся моллюсками акула из позднего мела Северной Америки
{{Information |Description={{en|1=Ptychodus mortoni - giant (7 m long)durofagous shark from Late Cretaceous of North America}} {{ru|1=Ptychodus mortoni - гигантская (7 м длиной) питавшаяся моллюсками акула из п