chordate

A nearly identical process occurs in other species, especially among Chordates.

In some chordates, it persists throughout life as the main support down the length of the body.

Gill slits are, at some stage of life, found in all chordates.

It also has "tentacles" on the front of its head, unlike living chordates.

On the basis of these findings, they built a new scenario for chordate evolution.

It has also proved difficult to produce a detailed classification within the living chordates.

The identification of the new specimen as a chordate will be controversial, scientists said.

These are features typically found in chordates, although it is difficult to make more precise comparisons.

They were called the chordates, and started a momentous chain of evolutionary events.

Chordates have specialized to the point where segmentation is not clearly marked.

Vertebrates are the only chordate group to exhibit a proper brain.

Attempts to work out the evolutionary relationships of the chordates have produced several hypotheses.

The first chordates were primitive* creatures that did not seem very different from worms.

There are many important differences between chordates and echinoderms.

Earlier chordates with gills used them for both respiration and feeding.

Such a skeleton is present in echinoderms and chordates.

In the early embryonic stage it looks like the hollow nerve cord of chordates.

The loss raises the question of the evolutionary constraints that have prevented similar changes in the other chordates.

If the ancestral chordates had perished, creatures with central nervous systems might never have developed.

Some scientists are already questioning whether Yunnanozoon is really a chordate.

The chordates include the dominant living animals, if you measure dominance by size, or the capacity to alter the world.

"We are not aware of any wars within the chordate phylum at this epoch."

"The fact that a chordate who could have been Markarian also passed this way, only a year or so ago."

There is evidence that invertebrate chordates are also inverted.

The invertebrate chordate classes are from Fishes of the World.