While there I described an extremely large pair
of oviraptorosaur eggs from the Cretaceous of southeast Idaho in order to gain insights into the parent animal's nesting behavior and reproductive biology.
The new species of
giant oviraptorosaur is thought to be the largest dinosaur known that cared for its young in a similar way to modern birds.
«I am really excited about this discovery because Anzu is the
largest oviraptorosaur found in North America,» she continued.
Researchers have found a number of fossilized nests from the group of dinosaurs
called oviraptorosaurs, fairly close relatives of early birds.
A new method used to perform geochemical analysis of fossilized eggs from China has shown that
oviraptorosaurs incubated their eggs with their bodies within a 35 - 40 ° C range, similar to extant birds today.
Other dinosaurs of the same type, known
as oviraptorosaurs, have seldom measured more than about two metres.
The new species, dubbed Tongtianlong limosus (or «muddy dragon on the road to heaven»), marks the sixth species of
oviraptorosaur found in the Ganzhou area.
Fortunately many
new oviraptorosaur specimens have been found over the last several years, opening up research opportunities and allowing us to tackle questions about their growth and evolutionary history.
I'll be visiting several museums over the next year in order to measure and sample many of these new
oviraptorosaur specimens.
I am particularly interested in figuring out how quickly
oviraptorosaurs grew from babies to adults, and what the ecology and anatomy of modern birds can tell us.
My goal is to not only understand
how oviraptorosaurs grew, but also to reconstruct how they may have lived and interacted with their environment based on their anatomy.
The lateral surface of the nasal is strongly concave, and although the surface is not well preserved, visible regions of original bone texture indicate extreme pneumaticity in this region, as is standard for
derived oviraptorosaurs.
This result confirms the discovery made in the 1990s of
fossilized oviraptorosaurs stretched across their clutch, suggesting that they incubated their eggs.
«Thanks to this fossil, we now know that these eggs were laid by a
gigantic oviraptorosaur, a dinosaur that would have looked a lot like an overgrown cassowary.
He found that the eggs of small and medium -
sized oviraptorosaurs could have borne the weight of an adult sitting on a nest of a dozen or so tightly packed eggs.
But he finds Tanaka's calculations persuasive and agrees that even the
biggest oviraptorosaurs probably sat on their eggs.
The dino is one of the
earliest oviraptorosaurs, so it lived close to the dinosaur extinction event, when an asteroid struck Earth 65 million years ago, Schachner said.
Until recently the diversity and growth of these animals was difficult to study
because oviraptorosaur fossils were only rarely discovered in North America.
Instead, microscopic examination of
oviraptorosaur bones and measurements of their hind limbs will allow me to calculate their age and growth rate.
As part of my doctoral thesis I am examining the diversity and ecology of North
American oviraptorosaurs just prior to the end - Cretaceous mass extinction event.
After the fossils were recovered and ultimately returned, scientists carefully analyzed the embryo — nicknamed «Baby Louie» — and determined that the 90 - million - year - old remains represent a new species of
giant oviraptorosaur, which they dubbed Beibeilong sinensis («baby dragon from China»), they report today in Nature Communications.
Whether those
largest oviraptorosaurs, with eggs up to 40 centimeters in diameter, had open nests and brooded like their smaller cousins or buried their eggs more like modern crocodiles has been an open question.
They say it is the first known specimen of a gigantic bird - like dinosaur belonging to the group known
as oviraptorosaurs.
During this research I became very interested in the growth, biology, and ecology
of oviraptorosaurs and decided to shift my research into the study of their anatomy and growth.
It belongs to a group called
the oviraptorosaurs — funny - looking feathered dinosaurs with sharp beaks which were ancestors of birds.
According to the researchers, the incubation temperature calculated for
the oviraptorosaurs eggs is thus coherent with the way these dinosaurs are thought to have incubated their eggs.
Oviraptorosaurs were feathered bipedal dinosaurs with a beak, giving them an appearance reminiscent of certain birds.
Researchers from Lyon, working in collaboration with a Chinese team, have developed a method based on the geochemical analysis of fossilized eggs and have calculated for the first time that
the oviraptorosaur eggs were incubated within a 35 - 40 ° C temperature range.
Paleontologists knew Baby Louie was some kind of
oviraptorosaur, a two - legged, birdlike dinosaur.
Although the fossil record of giant
oviraptorosaurs is sparse, based on the wealth of Macroelongatoolithus that are known it now seems that giant oviraptorosaurs were common creatures during the Cretaceous period.
But
some oviraptorosaurs weighed 3000 kilograms, as much as a modern rhinoceros.
The results showed that
the oviraptorosaur eggs were less porous than the earlier studies had indicated.
The roughly meter - long fossil, researchers say today in Scientific Reports, represents a new species of
oviraptorosaur, a group of feathered, birdlike dinosaurs that rapidly diversified in the few million years before an asteroid impact wiped out the dinosaurs 66 million years ago.
«
Oviraptorosaurs are a group of dinosaurs that are closely related to birds and often have strange, cassowary - like crests on their heads.»
Jade examines
an oviraptorosaur metatarsal (foot bone) as part of her work with the Vertebrate Paleontology Collections Grant.
Jade Simon holds the tibia of a large
oviraptorosaur, excavated from the Hell Creek Formation of Montana.
I am currently a PhD student at the Royal Ontario Museum (ROM) in Toronto, Ontario working with Dr. David Evans to investigate diversity, growth, and ecology of
oviraptorosaurs — a group of charmingly odd, beaked theropod dinosaurs that inhabited North America and Asia throughout the Cretaceous period.
Portions of the foot are also preserved associated with the hind limb, and I will measure and describe these elements as part of
my oviraptorosaur ecology study.
These are common in the fossil record, suggesting that large
oviraptorosaurs had a large range during Cretaceous times.