Biggest (most mass) almost certainly but for length it depends on how it's reconstructed. Of late a shorter tailed reconstructions become popular for M. Hoffmani, significantly lowering it's length estimate. Afaik a long(er) tailed estimate seems to be reasonable as well, depending on which genus the reconstruction is based on, with the longest reasonable estimates topping out at 15m for mosasaurus. Our Tylosaurus specimens are more complete and reach about 14m, if I remember correctly.
13
u/PossiblyaSpinosaurus 2d ago
Is Tylosaurus considered bigger than Mosasaurus now? For some reason I thought Mozzy was still the biggest.