Herbivorous Dinosaurs Sometimes Took A Cheat Day in Their Diet

If you have ever been tempted to cheat on your diet, you are not alone. And if you have “cheated” on your diet, there is no need to feel guilty: even dinosaurs couldn’t keep it together!

Its true; a new study says that some herbivorous dinosaurs would sometimes cheat on their regular plant-based diet by eating crustaceans, now and then.

While part of this makes sense on a fundamental level it might make even more sense when you learn that the dinosaur species most likely “cheat” were hadrosaurs.

Hadrosaurs were a kind of duck-billed dinosaur and might have been the most common type of herbivore to live during the Cretaceous period. New research suggests, though, that they did not eat only marine vegetation as we previously thought: instead, it seemed that they would often eat crustaceans (and that this dietary wandering might be related to mating behaviors).

First of all, the research begins with the discovery of definitive crustacean shell pieces in fossilized dinosaur feces samples dating back about 75 million years. The samples were taken from the Grand-Staircase-Escalante National Monument, located in southern Utah.

Study author and curator of paleontology at the University of Colorado-Boulder Museum of Natural History, Karen Chin refused to believe the facts at first. “I was very surprised,” she said, “but I think it reminds us that there’s a lot we just don’t know about the behavior of ancient animals.”

As such, she encourages, “We need to refine our presumptions about dinosaur diets.”

Obviously, we have been able to learn a great deal about these magnificent creatures from the discovery and study of their bones. These bones tell us quite a bit about how the animals lived and what the atmosphere must have been like. However, they only tell part of the story. The discovery of crustaceans in fossilized herbivore feces, however, sheds new light on so much more in regards to how these animals actually interacted with their environment (not just what we theorize).

Chin goes on to say, “Direct evidence for diet in the fossil record is very rare. We are usually forced to rely simply on the bones, so we study the teeth and the jaw and other aspects of functional morphology. So when we find coprolites like these … they do provide a different perspective on the diet.”

So, why would these herbivores eat crustaceans? Well, Chin suggests that it was not a regular behavior but it was regulated by season. For example, Herbivores can’t simply eat rotting wood all the time (eventually there wouldn’t be enough) but they might have switched to crustaceans during the mating season to help fill in the protein and nutrient gaps.


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