Scaling against which extinct raptorial sperm whale yields the maximum estimated length for Livyatan?

Answer

Zygophyseter

Determining the absolute maximum size of Livyatan melvillei requires scientists to employ scaling methods based on comparisons with known relatives, as a full postcranial skeleton is missing. Two primary comparative models are used: the modern sperm whale and another extinct raptorial sperm whale named Zygophyseter. While scaling against the modern sperm whale results in a lower estimate of around 13.5 meters, utilizing Zygophyseter pushes the maximum potential length calculation higher, reaching an estimated 17.5 meters (57 feet). This variance highlights the inherent uncertainty in defining the definitive size of the ancient predator.

Scaling against which extinct raptorial sperm whale yields the maximum estimated length for Livyatan?
PredatorsizefossilWhaleLivyatan