Mexico has discovered a new genus and species within the Ornithomimidae dinosaur family.
by Bob Yirka , Phys.org
Within the Ornithomimidae family, a group of geologists, paleontologists,
and climate scientists from institutions in Mexico, the United States, and Spain
have discovered a new genus and species.
The team explains their investigation into the ancient ostrich-like dinosaur
and its place in the family tree in an article that was published in the journal
Cretaceous Research.
All of the theropod dinosaurs in the Ornithomimidae family resembled the modern
ostrich in some way.
Although some have apparently been found as belonging to the Lower Cretaceous
Wonthaggi Formation of Australia, previous study has revealed that the majority
were herbivorous or omnivores, quick runners, and existed during the Late Cretaceous
Period of Laurasia.
The majority of the family members also had small heads and lengthy necks,
forelimbs, and hindlimbs, according to the researchers.
While working at a dig site in Coahuila in 2014, a group of paleontologists and
archaeologists found the fossilized remains of a dinosaur that they were unable
to identify.
After being delivered to Benemérita Escuela Normal de Coahuila, the remains
stayed there until the team working on this new endeavor started
a new investigation.
Despite being unmistakably a member of the Ornithomimidae family, the study
team discovered that the remains belonged to a previously undiscovered dinosaur
species.
The team named it Mexidracon longimanus after demonstrating that it originated
around 73 million years ago.
The researchers was able to verify that it was a member of the Ornithomimidae
family and that it had a polytomic link with other members of its clade after doing
a phylogenetic analysis of the remains. They observe that M. longimanus's exceptionally long metacarpals, which indicate
that it had long hands with a palm longer than its entire upper arm,
allow it to be easily distinguished from other members of its family.
By comparing them to those worn by contemporary tree sloths, the researchers
hypothesize that their function was to enable the dinosaur to reach into trees,
bushes, or shrubs and drag branches or even twigs into its mouth.
They add that if the dinosaur had been hunting small animals that lived close
to the water's edge, their hands would have been helpful.
Source phys.org
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