found: Jordan, E.L. Chordate zoology, 2013, viewed via Google books, Apr. 17, 2017:p. 1 (Phylum Chordata) p. 2 (chordate animals; chordates; most of the living chordate animals are well-known familiar vertebrate animals such as the fishes, amphibians, reptiles, birds and mammals. The less well-known animals include a number of marine forms such as the tunicates and lencelets [sic, i.e. lancelets])
found: NCBI taxonomy browser, Jan. 6, 2017(Chordata (chordates). Rank: phylum. Genbank common name: chordates. Lineage: cellular organisms; superkingdom Eukaryota; [no rank] Opisthokonta; kingdom Metazoa; [no rank] Eumetazoa; [no rank] Bilateria; [no rank] Deuterostomia)
found: AZ Animals, viewed December 10, 2021(Chordata phylum splits in to seven animal classes: Agnatha (jaw-less fish), Chrondrichtyes (cartilaginous fish), Osteichthyes (bony fish), Amphibia (amphibians), Reptilia (reptiles), Aves (birds), Mammalia (mammals))
