Sentences with phrase «of lungfish»

Back at 400 million years ago, our ancestors are just venturing out of the sea onto land as some sort of lungfish or amphibian.

Coupled with the ability of the lungfish to fully rotate the limb and place each subsequent footfall in front of the joint, the motion suggests that similar creatures would have been capable of producing some of the fossil tracks credited to tetrapods.

It also suggests that fossil tracks long believed to be the work of early tetrapods could have been produced instead by lobe - finned ancestors of the lungfish.

Further, the aerial hearing of lungfish and salamanders suggests the first land animals heard well enough in air to provide a functional steppingstone for the evolution of the middle ear.

Using x-ray imaging, they did just that, showing that the lungs of P. annectens resonated at about 300 Hz, matching the sensitivity of the lungfish's hearing.

A team of Danish researchers from Aarhus University, Aarhus University Hospital and the University of Southern Denmark therefore studied the hearing of lungfish and salamanders, which have an ear structure that is comparable to that of different kinds of early terrestrial vertebrates.

James Kirkland, state palaeontologist at the Utah Geological Survey, identified the tooth as coming from the upper jaw of a lungfish in the extinct genus Ceratodus, a freshwater bottom - feeder which used massive tooth plates to crunch shelled animals.

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.

Not exact matches

look up the lungfish, or anything on the evolution of whales.

Shedd Aquarium is saddened to announce the passing of one of its most iconic and beloved animal residents and longest - lived of any fish in a zoological setting in the world — Granddad, a male Australia lungfish (Neoceratodus forsteri) who was humanely euthanized Sunday due to a rapid decline in quality of life associated with old age.

Kirkland and Shimada suspect the monster lungfish, which dates from between 160 million and 100 million years ago — during the age of dinosaurs — fed on turtles.

James Kirkland, a palaeontologist at the Utah Geological Survey, identified it as being from a lungfish of the extinct genus Ceratodus, which lived between 160 million and 100 million years ago.

By studying the animals» sense of vibration, the researchers were able to demonstrate that both lungfish and salamanders detect sound by sensing the vibrations induced by sound waves.

The lungfish ear is a good model for the ears of the first terrestrial vertebrates.

It was Charles Darwin who coined the term «living fossil» to describe extant creatures, such as the gar (another Great Lakes resident) and the lungfish, which have been present for many millions of years in the fossil record yet appear to have undergone very little anatomical change.

Two new studies published in the journals Proceedings of the Royal Society B and The Journal of Experimental Biology show that lungfish and salamanders can hear, despite not having an outer ear or tympanic middle ear.

So far, Archer has found remains of carnivorous kangaroos, marsupial lions, giant snakes, tree - climbing crocodiles, miniature tyrannosaurs, prehistoric lungfish, and the largest - ever bird, a 10 - foot - tall 1,000 - pounder that he likes to call the «demon duck of doom.»

Lungfish are members of an ancient group of lobe - finned fishes (Class Dipnoi), having a continuous fossil record originating in the Devonian period around 400 million years ago.

Professor Ted Taylor, from the University of Birmingham, said: «When lungfish gulp air at the water's surface, their heart rate instantly increases — signalling a diversion of blood to the creature's lungs.

The African lungfish (Protopterus annectens) has lobe - shaped fins similar to those seen in the ancestors of the first vertebrates to walk on land.

With their proto - lungs and proto - limbs, lungfish represent the earliest stage in the evolution of air - breathing vertebrates.

«It's the most primitive lungfish and holds a special place in the evolution of the transition to land,» says Power.

Two of these, the South American and South African lungfishes, are well adapted to air breathing and can survive on just their lungs for extended periods.

And the marbled lungfish — a living piece of evolutionary history with the largest genome of any animal — is also rated as of least concern, despite being commonly eaten by humans.

They played sounds into the tube in a range of frequencies and carefully positioned the lungfish in areas of the tube where the sound pressure was high.

To answer this question, a team of Danish researchers looked at one of the closest living relatives of early land animals, the African lungfish (Protopterus annectens).

Watching a lungfish, our closest living fish relative, crawl on its four pointed fins gives us an idea of what the first evolutionary steps on land probably looked like.

As lungfish ambled across the floor of the tank, they raised their bodies off the surface — something only four - legged land animals usually do, according to a paper published online today in the Proceedings of the National Academy of Sciences.

«And then we get complete sets of lineages we are quite familiar with: coelacanths, also lungfish, and of course our direct ancestors the tetrapods (every land vertebrate ever, plus birds, bats, dolphins and whales).»

The lungfish's ability to use its thin limbs to support its body may be helped by the reduced demands of gravity underwater, the authors proposed.

The eel - like body and scrawny «limbs» of the African lungfish would appear to make it an unlikely innovator for locomotion.

December 12, 2011 View video of the African lungfish using its thin pelvic limbs to lift its body off the bottom surface to propel itself forward.

«It's tempting to attribute alternating impressions to something like the footfalls of an early tetrapod with digits, and yet here we've got good evidence that living lungfish can leave similar sequences of similar gait,» said Coates, PhD, professor of Organismal Biology and Anatomy.

Extensive video analysis, published in the Proceedings of the National Academy of Sciences, reveal that the African lungfish can use its thin pelvic limbs to not only lift its body off the bottom surface but also propel itself forward.

«What we're seeing in lungfish is a very nice example of how bottom - walking in fish living in water can easily come about in a very tetrapod - like pattern.»

«Lungfish are very closely related to the animals that were able to evolve and come out of the water and onto land, but that was so long ago that almost everything except the lungfish has gone extinctLungfish are very closely related to the animals that were able to evolve and come out of the water and onto land, but that was so long ago that almost everything except the lungfish has gone extinctlungfish has gone extinct.»

December 12, 2011 A small step for lungfish, a big step for the evolution of walking The eel - like body and scrawny «limbs» of the African lungfish would appear to make it an unlikely innovator for locomotion.

During the Devonian, Placodermi (armored fish), Sarcopterygii (lobe - finned fish and lungfish) and Actinopterygii (conventional bony fish or ray - finned fish) evolved rapidly, many of which became huge and fierce predators.

Scott Endres: «Lungfish, Godflesh, Spacemen 3, Glenn Branca, Andrei Tarkovsky, Luis Buñuel, Ingmar Bergman, Thomas Pynchon, Franz Kafka, Gene Wolfe, Lovecraft and, of course, Samuel Beckett.»