Sentences with phrase «hadrosaur fossil»
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.
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That layer also contained numerous fossils of Maiasaura, a type of large, herbivorous duck - billed dinosaur, or hadrosaur (SN: 8/9/14, p. 20).
The well - preserved fossil of a plant - eating hadrosaur, complete with skin and tendons, was discovered in 1999.
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.»
But there was a problem with this finding: fossils show no evidence that hadrosaurs could hop.
Mary Schweitzer and her colleagues first remove minerals from fossils such as a hadrosaur femur, leaving organic material behind.
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.