Fossils unearthed 35 years ago in National Park named Big Bend have been recently recognized as a new dinosaur species, Aquilarhinus palimentus.
This duck-billed dinosaur is known for its aquiline nose, and wide lower jaw, shaped like two trowels laid side by side.
The fossil was initially found within the 1980s by Texas Tech University Professor Tom Lehman. The bones have been badly weathered and stuck together, making them impossible to study.
The 1990s revealed two arched nasal crests regarded as distinctive of the Gryposaurus genus. At that time the peculiar lower jaw was recognized, but it surely wasn’t until recent analysis that researchers got here to realize that the specimen was more primitive than Gryposaurus and all other saurolophid duck-billed dinosaurs.
“This new animal is among the more primitive hadrosaurids known and can, therefore, assist us in understanding how and why the ornamentation on their heads advanced, in addition to where the group initially evolved and migrated from,” says lead author Dr. Albert Prieto-Márquez from the Institut Català de Paleontologia Miquel Crusafont, close to Barcelona. “Its existence adds one more piece of evidence to the rising hypothesis, nonetheless up within the air, that the group started within the south-western area of the U.S.”
Duck-billed dinosaurs, also called hadrosaurids, had been the most common herbivorous dinosaur at the end of the Mesozoic Period, and all had a similar-looking snout. The front of the jaws meets in a U-shape to
assist a cupped beak used for cropping plants. The beak of some species is broader than others. However, there was no proof of a significantly totally different from (and therefore probably a different feeding style) until Aquilarhinus was found. The decrease jaws of Aquilarinus meet in a peculiar W-shape, creating a wide, flattened scoop. Around 80 million years ago, this explicit dinosaur would have been shoveling
through loose, wet sediment to scoop loosely-rooted aquatic plants from the tidal marshes of an ancient delta, where today lies the Chihuahuan desert.