To illuminate the origins of chordate and vertebrates, we generated a draft of the protein - coding portion of the genome of the most studied ascidian, Ciona intestinalis. (science.sciencemag.org)
Similarly, ENSEMBL provides genome resources for chordate genomes with a particular focus on human genome data. (genomemedicine.biomedcentral.com)
These researchers estimated arthropods diverged from more primitive chordates more than 900 million years ago, and Nematodes from that lineage almost 1200 million years ago. (fossilmuseum.net)