Sentences with phrase «vertebrate groups in»

However, with approximately 58 percent of the world's 335 turtle species threatened with extinction, turtles are the most endangered vertebrate group in the world.

Approximately 58 % of the world's 335 turtle species threatened with extinction, which makes turtles the most endangered vertebrate group in the world.

Not exact matches

This accounts for the tendency, which has been insufficiently noted, of every living phylum (insect and vertebrate) to group itself towards its latter end in socialized communities.

«These results change our understanding of when the largest living group of vertebrates evolved and allow us to iron out a lot of the wrinkles in our understanding of the sequence of evolutionary events.»

I was also disappointed that the declaration did not include fish, because the evidence supporting consciousness in this group of vertebrates is also compelling.

«Our results highlight the complexity of the conservation of a group that represents an important part of the world's biodiversity, since almost 10 per cent of the planet's vertebrates are freshwater Amazonian fish,» added Dr Paulo Pompeu, Professor at the Federal University of Lavras in Brazil and another co-author of the study.

The «Tully monster,» an ancient animal that had long defied classification, was in fact a vertebrate, two groups of scientists claimed.

«This study reveals some groups of virus have been in existence for the entire evolutionary history of the vertebrates — it transforms our understanding of virus evolution,» said Professor Eddie Holmes, of the Marie Bashir Institute for Infectious Diseases & Biosecurity at the University of Sydney.

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.

A new paper published in latest issue of the Journal of Vertebrate Paleontology shows that several of these Jurassic sites are linked together by shared species and can be recognized as representing a single fossil fauna and flora, containing superbly preserved specimens of a diverse group of amphibian, mammal, and reptile species.

The extinction that ended the Devonian Era 359 million years ago created opportunities quickly exploited by a formerly rare and unremarkable group of fish that went on to become — in terms of the sheer number of species — the most successful vertebrates (backboned animals) on the planet today: the ray - finned fish.

Sharks» skeletons are made of cartilage, placing them along with rays and skates in a group of jawed vertebrates called cartilaginous fish.

«We were able to show salamander - like regenerative capacities in both — fossil groups that develop their limbs like the majority of modern four - legged vertebrates as well in groups with the reversed pattern of limb development seen in modern salamanders,» said Dr. Jennifer Olori of State University of New York at Oswego, co-author on the study.

The newly described species (artist's representation shown), which lived between 220 million and 230 million years ago, was one of the largest in a group of amphibians known as metoposaurs and is the first known in this region from well - preserved fossils, the researchers report online today in the Journal of Vertebrate Paleontology.

Charles Darwin thought they were relatives of mollusks; in the mid-1800s, however, Russian biologist Alexander Kowalevsky countered that the mobile tunicate larva, with its dorsal cartilaginous column resembling a spine, should be grouped with vertebrates and not clams and snails — even though the adult never develop a backbone.

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.

Dunne continued: «We now know that the rainiforest collapse was crucial in paving the way for amniotes, the group which ultimately gave rise to modern mammals, reptiles and birds, to become the dominant group of land vertebrates during the Permian period and beyond.»

«By narrowing down how many species exist within the largest group — the insects and other arthropods — we are now in a position to try to improve estimates for all species, including plants, fungi and vertebrates.

A research group at the University of Helsinki discovered the fastest event of speciation in any marine vertebrate when studying flounders in an international research collaboration project.

Since two of the three related groups use only somites in vertebral development, Criswell concluded that the common ancestor for all jawed vertebrates had a backbone derived from somites.

Autohaemorrhaging, as this gruesome trick is called, is moderately common in insects, but horned lizards seem to be the only group of vertebrates that do it.

In all land vertebrates (including humans), spines form from only one group of cells called somites.

Professor Griffin explained: «Bird genomes are distinctive in that they have more tiny microchromosomes than any other vertebrate group.

The last common ancestor of sharks and bony fishes probably didn't have gill arches arranged like those in modern sharks — which, in turn, suggests that the oldest known species of bony fishes can likely provide more information about the earliest jawed vertebrates (a group that today includes humans) than early chondrichthyans can, the researchers contend.

With help from Yale University biology student Ignacio Quintero, Wiens calculated such estimates for 540 species in 17 groups of living vertebrates.

That's prompted researchers to speculate that sometime in the distant past, arthropods (a group that includes spiders, beetles, and flies) and vertebrates evolved separate ways to build their bodies.

All major groups of animals — an entire kingdom of multicellular life that today includes insects, worms, shellfish, starfish, sea anemones, coral, jellyfish, and vertebrates like us — bloomed suddenly in the fossil record during an evolutionary extravaganza known as the Cambrian explosion, which occurred 530 million years ago.

Sharks belong to a more basal group of vertebrates and their scales have been observed in the fossil record over the course of 450 million years of evolution, so the Sheffield researchers believe this indicates that all vertebrates, whether they live on land or in the sea, share the same developmental programme for skin, teeth and hair that has remained relatively unchanged throughout vertebrate evolution.

«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.

Dinosaurs make up one - third of all vertebrate genera found in the fossil beds, and all three major dinosaur groups had already appeared — not bad for a time when the beasts were thought to be rare.

In addition, the paper ostensibly focuses on a small group of vertebrate species that are known to be endangered or were considered extinct and then rediscovered.

These evolutionary hypotheses may also be compared with diversification and selective extinction patterns for other vertebrate groups that invaded Amazonian freshwater ecosystems from marine ancestries (e.g., stingrays belonging to Potamotrygonidae Garman, 1877, see Lovejoy, Bermingham & Martin, 1998; croakers in the genus Plagioscion Gill, 1861, see Cooke, Chao & Beheregaray, 2012), in conjunction with the timing of orogenetic events during the late Neogene (Hoorn et al., 2010).

The genus Cryptosporidium, a group of single - celled eukaryotic organisms in the phylum Apicomplexa, comprises an unknown number of species infecting numerous vertebrate species.

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.

Abstract In my group, we study the neural crest, a unique cell population that emerges from the primitive neural field and which has a multi-systemic and structural contribution to vertebrate development.

Later, at the Max - Planck - Institute for Molecular Genetics he led a group in theDepartment for Vertebrate Genomics of Prof. Hans Lehrach.

Qingmendous, scientists report in the journal Science Advances on Friday, was part of a group of «lobe finned fishes» that included the first vertebrates to crawl onto land.

He then moved to Cambridge, UK, to train and work as a computational biologist in the Vertebrate Genomics group at the European Bioinformatics Institute (EMBL - EBI).

Alongside a team of scientists based in Hungary, Tamás has been studying systems regulation of autophagy in humans within TGAC's Vertebrate & Health Genomics group and IFR's Gut Health & Food Safety (GHFS) programme.

Dr. Manzanares is a senior scientist at the CNIC in Madrid, where his research group is studying the evolution of embryonic pluripotency in vertebrates.

One striking feature of vertebrates is the prominent role that vision plays in almost all major animal groups.

Given that Dazl is present in bony fish such as zebrafish and medaka [52], [53], we then asked if Dazl is present in the cartilaginous fish, phylogenetically the oldest group of living jawed vertebrates.

We are also examining size proportions in other vertebrate groups, including reptiles, amphibians, cetaceans, and several fossil groups.

Significance of enrichments (grey background) and depletions (white background) for the three «metazoan complexity groups» (non-bilaterian (basal) metazoans; invertebrate bilaterians; vertebrates) are indicated in the columns to the left of the heatmap.

December 21, 2011 «Head - first» diversity shown to drive vertebrate evolution The history of evolution is periodically marked by explosions in biodiversity, as groups of species try out a wide range of shapes and sizes.

Shaun heads a large Neuroecology Group that investigates the neural basis of behaviour in both invertebrates and vertebrates, with special emphasis on sensory systems and vision.

WNBA superstar Sue Bird publicly announced that she was gay and dating Seattle Reign and USWNT star soccer player Megan Rapinoe in an article Birds (Aves) are a group of endothermic vertebrates, characterised by feathers, toothless beaked jaws, the laying of hard - shelled eggs, a high metabolic

We are learning to's include: to classify living things; to identify and name living things; to use a classification key to identify vertebrates and invertebrates; to use a classification key to identify the 5 vertebrate groups; to identify invertebrate groups in their own habitat; to understand how environments change and the dangers this can cause for wildlife.

More importantly, we know very little about the status, in terms of abundance, of most taxa, with the exception of well known groups, which would mean vertebrates.

This paper alleges that after analysing over 300 species (across 3 groups: plants, insects and vertebrates) between 1970 - 2012, that «Climatic change has had a wide range of impacts on species, with more species impacted positively than negatively in the short - term at least», with climate change the «largest positive impact».