Ptychodus is about 1.62× longer by these reference values.
Ptychodus uses a 9.7 m upper reference, compared with 6 m for Great white shark. A clean mass ratio is not shown because at least one weight is not reliably reconstructed.
ON THE SAME SCALE
Human. Bus. Whale.
Pick your reference.
Length bars use upper comparison values and do not show body depth, tail proportion or typical adult size. A long thresher tail, for example, does not equal whale-shark body mass.
THE NUMBERS
Side by side.
WHAT SETS THEM APART
More than a size contest.
Length and weight
Ptychodus is represented by recent reconstructions approach 9.7 m / 32 ft; Great white shark by about 6 m / 20 ft. A body outline is rare; length estimates can change with new fossils. Maximum length and mass are exceptional upper-end figures.
Habitat and diet
Ptychodus: Cretaceous shallow seas; hard-shelled prey. Great white shark: Temperate seas worldwide; fish, rays and marine mammals.
Bite evidence
Ptychodus: Hard-prey specialization does not justify inventing a force number. Great white shark: A 3-D finite-element model predicted the bite of a very large individual; it was not measured on a living shark.
Fossils change the certainty
At least one animal is known from fossils. Fossil length, weight and bite estimates depend on which living analogues and scaling equations researchers choose.
TRACE THE CLAIMS