>>32441122>>32441137>>32441201Most of Ibrahim et al. 2014 still stands even if you accept that they severely undershot on the legs. Obviously there's a pretty sparse set of data, but the older reconstructions that give it coelurosaurian legs are probably wrong by equal or greater measure.
Spino has an enormous tail in both reconstructions, the new one just points out its utility for swimming, which implies a more muscular and heavier tail. That implies a significant amount of control over its balance, which would easily allow a Spinosaurus with legs halfway between old and new reconstructions to use both quadrupedal and bipedal stances. Quadrupedal walking would save energy, be more stable, and be more maneuverable in water, while a bipedal stance would probably require more energy, but would still see plenty of use by a predator. A stance capable of either with a little energy expenditure would be ideal for something that hunts on land and in water.
tl;dr it's probably between the old and new extremes. Crouched.
