|image = Pristella tetra1.jpg | image_caption = An 'X-ray fish' (Pristella tetra), its translucent body making visible the nerve cord that defines the chordates | domain = Eukaryota | regnum = Animalia | subregnum = Eumetazoa | unranked_phylum = Bilateria | superphylum = Deuterostomia | phylum = Chordata | phylum_authority = Bateson, 1885 | subdivision_ranks = Classes | subdivision = See below }} Chordates (phylum Chordata) are a group of animals that includes the vertebrates, together with sev… (More on Chordate)