Biggest Dino yet discovered

[Anomalocaris]

Now don't be such a spoil sport.

Its highly likely they did have enormous stomachs as they had no chewing teeth. The vegetation available to them was very poor so they would have to eat tonnes of the stuff.

Its hard to think how else they would have got enough inside them to survive.

Yes - there are many unknowns but this creature is bigger than Argentinasaurus - that is for sure. How big it actually was is open to question - but it was certainly very very large indeed.

Also agree that there have been fragments of bones found that might indicate even larger dinos out there. Great! Right now however this is the largest we have confidence on.

I am not sure just how much they need to eat to survive. Very large creatures tend to be more energy efficient than smaller ones. So proportionally they ought to need less to survive than bisons or cows. They may, at least at adult stage, also be inertial endotherms, meaning they don't generate their own body heat, but really on favorable mass to skin area ratio to maintain active body temperature, thus drastically cutting down further how much they needed to eat to get around. Also, we have no clear concept of how long they live and how fast they grow. If they grow slowly and live a very long time, their energy and nutritional budget can further be reduced.

I don't know how much direct evidence there is of just what sort of plants they ate. A lot of the idea that sauropods ate low quality food that must sit around and ferment inside a great big gut came from the the fact that some sauropods fossils seem to have gastroliths inside where their stomachs were. They caused some people to speculate that sauropods ate heavy woody plants and needed to ground down their foot by swallowing rocks with their food. But I am not sure this in conclusive evidence that their diet must be so poor that they must possess enormous fermentation tanks in the bodies to extract any nutrition. Also I don't think all sauropods have been found with gastroliths.

All I am saying is error bars on sauropod dinosaur size and weight estimates are so large, and those on so many sauropods overlap, that not a great deal of weight can be attached to any claims of "largest".