Sentences with phrase «vertebrate groups»

"Vertebrate groups" refers to different categories or types of animals that have backbones. These include mammals (like cats and dogs), birds, reptiles (like snakes and turtles), amphibians (like frogs and salamanders), and fish. Full definition
To probe this specialized feeding system, Dominique Adriaens, director of the Evolutionary Morphology of Vertebrates group at Ghent University in Belgium, turned to a technology that a growing number of researchers are taking advantage of — high - resolution X-ray computed tomography.
That's 20 percent more than the number of extinctions known to have occurred in vertebrate groups in more than a century.
They also suggest that the third eye of lizards evolved independently of the third eye in other vertebrate groups.
«As we found here, those developmental processes are still used to build the skeletons of many vertebrate groups, including humans.»
Although specimens of fishes, marine reptiles, non-avian dinosaurs, birds, and mammals of this age have all been recovered from this now - frozen continent, most fossils, especially those of land - living species, are fragmentary and poorly informative, and a number of major vertebrate groups that likely once lived in Antarctica (e.g., amphibians, crocodilians) have yet to be discovered at all.
Cavanilles Institute of Biodiversity and Evolutionary Biology, Terrestrial Vertebrates Group, University of Valencia, E-46980 Paterna, Valencia, Spain.
Of the ray - finned fish, the so - called Neopterygii («new fins») became particular biodiverse during the Triassic and, with over 30,000 species, today constitute the largest vertebrate group.
This fossil assemblage, newly named the Daohugou Biota after a village near one of the major localities in Inner Mongolia, China, dates from a time when many important vertebrate groups, including our own group, mammals, were undergoing evolutionary diversification.
The scientists studied the rib plates, so - calledcostals, of turtle shells and the ribs of various fossil and living vertebrate groups, including mammals, crocodiles and even dinosaurs.
Triassic dinosaurs couldn't displace the more abundant vertebrate groups — the rhynchosaurs and cynodonts — that dominated their world.
«On the one hand, there was this idea that the third eye was simply reduced independently in many different vertebrate groups such as mammals and birds and is retained only in lizards among fully land - dwelling vertebrates,» says Krister Smith at the Senckenberg Research Institute in Germany.
The fact that vasotocin and vasopressin influence various social behaviors in many species from diverse vertebrate groups suggests that functions related to social regulation have, in general, been highly conserved during evolution, but nobody had tested whether or not vasopressin has any effects on social behavior in humans.
Researchers found that 144 vertebrate species became extinct due to tropical deforestation from 1950 to 2009, about 20 percent more than a previous estimate of extinctions in forest - specific vertebrate groups since 1900.
Although I have worked with numerous species across broad vertebrate groups, current work focuses on goldfish and zebrafish, two closely related, highly social teleosts.
Classification of Vertebrate groups by ordering characteristics.
Frogs are the most threatened vertebrate group on Earth, with nearly one - third of the world's 6,468 amphibian species in danger, the company says.
We are also examining size proportions in other vertebrate groups, including reptiles, amphibians, cetaceans, and several fossil groups.
«Caecilians, turtles and some fish are the only major vertebrate groups that paleontologists still have questions about,» explained Jason Pardo, a doctoral candidate in the Faculty of Veterinary Medicine at the University of Calgary in Alberta, Canada.
Approximately 58 % of the world's 335 turtle species threatened with extinction, which makes turtles the most endangered vertebrate group in the world.
This begins to explain the ancestral origins of the neural basis for the close coupling between vocal and pectoral / gestural signalling that is observed among many vertebrate groups, including humans.
For each major vertebrate group, ancient and modern (and with no particular emphasis on ours), Bonnan examines the skeleton to see how structure relates to function using plain analogies: basic body plan is likened to a car chassis, jaws to scissors or nutcrackers, eyes to camera lenses.
Professor Griffin explained: «Bird genomes are distinctive in that they have more tiny microchromosomes than any other vertebrate group.
We recovered new fossils pertaining to all of these vertebrate groups — including significant new marine reptile and bird material — and collected an abundance of additional geological data.
Fishes are a practically ubiquitous group of vertebrates with the potential to help formulate hypotheses that hold relevance for all other vertebrate groups.
vertebrate The group of animals with a brain, two eyes, and a stiff nerve cord or backbone running down the back.
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