Sentences with word «hadrosaur»

Of these, six species would have coexisted at any one time, including two types of ankylosaurs (tank - like armoured dinosaurs), two types of hadrosaurs (duck - billed dinosaurs), and two types of ceratopsids (horn - faced dinosaurs).

Since bones from hadrosaurs are especially abundant in the Kaiparowits Formation, Chin suspects those kinds of dinos deposited the dung.

A few years ago, Fassett's colleagues were digging in a fossil - rich area of New Mexico when they uncovered the four - foot - long fossilized thighbone of a duck - billed, plant - eating hadrosaur in a sandstone cliff.

In 2007, Schweitzer's team excavated an 80 - million - year - old hadrosaur in Montana.

Dr Albert Prieto - Marquez, Research Associate in the School of Earth Sciences who co-led the research, said: «Some of the immensely successful duck - billed hadrosaurs of the Late Cretaceous might have been eating flowering plants, but their tooth wear patterns, and especially close study of their coprolites — that's fossil poops — shows they were conifer specialists, designed to crush and digest the oily, tough needles and cones.»

Rhinorex is the only complete hadrosaur fossil from the Neslen site, and it helps fill in some gaps about habitat segregation during the Late Cretaceous.

Rhinorex, which translates roughly into «King Nose,» was a plant - eater and a close relative of other Cretaceous hadrosaurs like Parasaurolophus and Edmontosaurus.

«We've found other hadrosaurs from the same time period but located about 200 miles farther south that are adapted to a different environment,» Gates says.

Call it the Jimmy Durante of dinosaurs — a newly discovered hadrosaur with a truly distinctive nasal profile.

In 2009, she, Asara, and colleagues reported in Science that they had isolated protein fragments from a second dinosaur, an 80 - million - year - old hadrosaur.

PROTEIN BOOST Hadrosaurs like Gryposaurus monumentensis (illustrated) may have supplemented their veggie diets with meaty treats, roughly 75 - million - year - old fossilized poop reveals.

Did four - legged hadrosaurs gallop like a horse, run like an ostrich or hop like a kangaroo?

Mike Benton, Professor of Vertebrate Palaeontology in the School of Earth Sciences, explained: «In other numerical work, we had found that nearly all dinosaurs showed a downturn about 100 million years ago, but the exceptions were two herbivore groups, the crested hadrosaurs and the horned ceratopsians.

In contrast, ceratopsids had skulls that suggest they were adapted to feeding on mid-sized shrubs, while the taller hadrosaurs were less picky and would have fed on anything within reach.

Early paleontologists found a wealth of fossils in the formation that reflect the region's watery past: swimming reptiles like plesiosaurs and mosasaurs, crocodiles and turtles, plus a handful of land - dwelling hadrosaurs.

But, although hadrosaurs may have been susceptible to cancer for congenital reasons, that doesn't figure into the current diagnosis, he notes.

Collectively, the sequences showed the purported hadrosaur collagen was more closely related to T. rex and birds than to modern reptiles.

The authors of this study describe a new brachylophosaurin hadrosaur, Probrachylophosaurus bergei, from the Judith River Formation in northcentral Montana, dated to ~ 79.8 - 79.5 million years ago, and compared its skull and body shape to related dinosaurs.

However, the scales are large, too large for the typical size of carnivorous dinosaurs and hadrosaurs roaming this area 66 million years ago.

About 84 % of the tracks were made by adult and near - adult hadrosaurs and 13 % by young presumed to be less than 1 year old.

(Previous analyses of fossilized bones also hinted at a growth spurt among hadrosaur youngsters, the researchers note.)

Most of the tracks, made somewhere between 69 million and 72 million years ago, were left by hadrosaurs, commonly known as duck - billed dinosaurs (the crested creatures in this artist's representation).

A mere 3 % of the tracks represent juvenile hadrosaurs, a rarity that strongly suggests the young of this species experienced a rapid growth spurt and therefore spent only a short time at this vulnerable size, the researchers report online this week in Geology.

About that time, I was also reading submissions for a magazine I was editing called Hadrosaur Tales.

Sellers and his team used a laser scanner to create a 3D computer model of the skeleton of an Edmontosaurus, a type of hadrosaur or «duck - billed» dinosaur, and added virtual muscles to make it move.

In addition to Nasutoceratops, the collection includes a variety of other plant - eating dinosaurs — among them duck - billed hadrosaurs, armored ankylosaurs, dome - headed pachycephalosaurs, and two other horned dinosaurs, Utahceratops and Kosmoceratops — together with carnivorous dinosaurs great and small, from «raptor - like» predators to a mega-sized tyrannosaur named Teratophoneus.

The well - preserved fossil of a plant - eating hadrosaur, complete with skin and tendons, was discovered in 1999.

He and his research team through funding by the National Science Foundation, have found two new dinosaurs in Antarctica including a «Jurassic Park - like» raptor or deinonychosaur in 2003 and a duck - billed dinosaur or hadrosaur in 1997, both finds added new families of dinosaurs to the list of Antarctic dinosaurs.

«Hadrosaur with huge nose discovered: Function of dinosaur's unusual trait a mystery.»

«Because many of the bones from our Alaskan species were from younger individuals, a challenge of this study was figuring out if the differences with other hadrosaurs was just because they were young, or if they were really a different species,» Druckenmiller said.

That layer also contained numerous fossils of Maiasaura, a type of large, herbivorous duck - billed dinosaur, or hadrosaur (SN: 8/9/14, p. 20).

So Schweitzer took a look at the pristine leg bone of a plant - eating hadrosaur that had been encased in sandstone for 80 million years.

Hadrosaurs were specialist feeders on confiers and other tough plants, and they were hugely diverse and abundant

Front to back: Lambeosaurus clavinitelis (a hadrosaur), Chasmosaurus belli, and Styracosaurus albertensis, both ceratopsids (horn - faced dinosaurs).

The amount of skin indicates how muscular the hadrosaur was and, consequently, how fast it could run.

This study of dentition now confirms that hadrosaurs were bucking the overall downturn.»

Not unexpectedly, differences were found between the three major groups (ankylosaurs, hadrosaurs and ceratopsids).

The tracks, a jumbled bunch of large and small footprints, are the first solid sign that duck - billed dinos, or hadrosaurs, settled together year - round in the polar region, which at the time probably had a climate similar to the modern Pacific Northwest's.

But there was a problem with this finding: fossils show no evidence that hadrosaurs could hop.

Rothschild has previously helped diagnose gout in a Tyrannosaurus rex, facial tumors in dwarf dinosaurs, and cancer in hadrosaurs; he acknowledges that if you look just at the literature, hadrosaurs did seem to be particularly susceptible to disease.

Fossil arm bones from a hadrosaur (likely Hadrosaurus foulkii, although its cousin Rhinorex is shown here) suggest the dinosaur developed septic arthritis — possibly after a predator's attack.

For the hadrosaurs, a four - legged gallop would also have put too much stress on their bones, so it is most likely they moved at slower speeds on four legs and reared up to run on two.

The hadrosaur fossils ushered in the study of paleontology in the United States.

Mary Schweitzer and her colleagues first remove minerals from fossils such as a hadrosaur femur, leaving organic material behind.

In January, Schweitzer's team reported in the Journal of Proteome Research (JPR) that it had redone its 2009 analysis to answer the critics, analyzing new pieces of bone from the hadrosaur and reworking their lab procedures to avoid contamination.

Hadrosaurs are usually identified by bony crests that extended from the skull, although Edmontosaurus doesn't have such a hard crest (paleontologists have discovered that it had a fleshy crest).

No other terrestrial vertebrates have ever remotely approached the great size of the sauropods, nor have they achieved the food - processing efficiency of the hadrosaurs, which had vertically stacked teeth that were replaced as they wore out.

Rhinorex also helps us further fill in the hadrosaur family tree.»

The dinosaur — a hadrosaur, or duck - billed plant - eater — apparently died in a soggy spot.