Sentences with phrase «on tetrapod»

Clack, however, believes a reassessment of the consensus view on tetrapod evolution might be in order.

Some of the most exciting research on tetrapods has come from an interdisciplinary project based in the United Kingdom.

Not exact matches

The shoulders and pelvis of early tetrapods expanded and strengthened, allowing for load - bearing on land.

«None of them are like tetrapods from later on.

Moving around on land required significantly more huffing and puffing — and oxygen — than swimming for early tetrapods.

TW: eed researchers focused on a handful of sites in Scotland, which was much closer to the equator and had a tropical climate when tetrapods were first coming ashore.

On the far side of the gap, named after Alfred Romer, the Harvard University researcher who first noticed it, tetrapods are rare and ill - adapted for terrestrial living.

Locomotion The muscles and bones in lobe - finned fish appendages gave tetrapods, ahem, a leg up on adapting to life on land.

«On the other hand,» explains Clauss, «the discovery reveals that there's a fundamental difference in morphological principles between mammals and other tetrapods.»

The tetrapod - shaped zinc - oxide nanoparticles, called ZOTEN, have negatively charged surfaces that attract the HSV - 2 virus, which has positively charged proteins on its outer envelope.

Together, the evidence suggests Ossinodus must have spent some time on land, making it the oldest known tetrapod to be adapted to land life — although earlier footprints exist.

«Based on the phylogenetic relationships and the presence of tetrachromacy in recent tetrapods it is most likely that the stem species - of all terrestrial vertebrates had photo receptors to detect blue, green, red and uv,» says Dr. Christian Fischer of the University of Göttingen.

Researchers at the University of Birmingham have discovered that the mass extinction seen in plant species caused by the onset of a drier climate 307 million years ago led to extinctions of some groups of tetrapods, the first vertebrates to live on land, but allowed others to expand across the globe.

Emma Dunne, from the University of Birmingham's School of Geography, Earth and Environmental Sciences, said: «This is the most comprehensive survey ever undertaken on early tetrapod evolution, and uses many newly developed techniques for estimating diversity patterns of species from fossil records, allowing us greater insights into how early tetrapods responded to the changes in their environment.»

Fish first adapted to life on land about 350 to 400 million years ago, when they evolved four legs to form the tetrapods, a group that includes amphibians, reptiles, birds and mammals.

A new study comparing the forces acting on fins of mudskipper fish and on the forelimbs of tiger salamanders can now be used to analyze early fossils that spanned the water - to - land transition in tetrapod evolution, and further understand their capability to move on land.

The findings are reported by researchers from Tokyo Institute of Technology (Tokyo Tech), the Centre for Genomic Regulation (CRG, Barcelona) and their collaborators in the journal eLife and give new insight into how fish evolved to live on land in the form of early tetrapods.

In the pursuit of high - performance OPMs, the research team employed a strategy based on insights from the C2N structure to realize a uniformly microporous robust 3D - CON structure by the condensation of tetrapod - shaped THA and hexagon - shaped hexaketocyclohexane (HKH).

However, in one group of tetrapods, temnospondyls (which are thought to be the ancestors of modern amphibians) these denticles were also found on small, bony plates that filled the large soft part of the palate.

Lobe - finned ancestors of the lungfishes as well as tetrapods could have evolved hindlimb propulsion and the ability to walk on the substrate at the bottom of a lake or marsh millions of years before limbs with digits and land - dwelling animals appeared.

«In a number of these trackways, the animals alternate their limbs, which suggested that they must have been made by tetrapods walking on a solid substrate,» said Melina Hale, PhD, associate professor of Organismal Biology and Anatomy.

The impact of the pull of the recent on the fossil record of tetrapods.

Although vertebrate life exists on land, the reptile - like tetrapods of this period predate any mammal or bird and would certainly «swarm» upon the land.

Perhaps the strangest, most immediately unrecognizable key chain of the three is the geometric, stepped shape, subtitled An institutional maze (Steptrapode), which is based on a heavy concrete erosion defense structure called a tetrapod or a dolos.

It may take us a century to halt it and reverse it during the worst times of it when we are living in a very harsh world not too different from the 3 million year time between the Great Dying of the Permian and the beginning of the Triassic where life in the sea was on a razor's edge and there was only one major tetrapod on land much further north.