Despite these conserved synapomorphies, chordates have largely diversified since their origin around 600 million years ago, especially vertebrates, one of the most successful animal groups on our ...

Vertebrates are thought to have emerged during the Cambrian explosion around 520 million years ago, but the point in time at which these animals branched away from the phylum of chordata, which lack ...

Among them were the chordates, to which vertebrates (animals with backbones) such as humans belong. What sparked this biological bonanza isn't clear. It may be that oxygen in the atmosphere ...

Chordates are deuterostomes, as during the embryo development stage the anus forms before the mouth. They are also bilaterally symmetric coelomates. In the case of vertebrate chordates ...

genes in aquatic chordates, revealing how these genes have diversified across species. This comparative analysis enhances our understanding of how NO functions in different vertebrate lineages ...