Ptychodus is about 1.07× longer by these reference values.
These animals are effectively close in maximum-length terms, so measurement uncertainty can matter more than the apparent difference. 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 THE DATA CAN SAY
Size is not the whole animal.
Length and weight
Otodus obliquus is represented by estimated to about 9.1 m / 30 ft; Ptychodus by recent reconstructions approach 9.7 m / 32 ft. Soft-body dimensions are inferred from teeth and living analogues. A body outline is rare; length estimates can change with new fossils.
Bite evidence
Otodus obliquus: No species-specific model is used. Ptychodus: Hard-prey specialization does not justify inventing a force number.
Living versus extinct
At least one animal is known from fossils. Fossil length, weight and bite estimates depend on which living analogues and scaling equations researchers choose.
Ecology changes the matchup
It belonged to the megatooth lineage that later produced megalodon. Flattened crushing teeth—not knife-like teeth—defined this huge shark.
TRACE THE CLAIMS