Although the name Chordata is attributed to William Bateson (1885), it was already in prevalent use by 1880. Meer weergeven

Chordates form a phylum of animals that are defined by having at some stage in their lives all of the following anatomical features:
• A notochord, a stiff but elastic rod of glycoprotein wrapped … Meer weergeven

The following schema is from the 2015 edition of Vertebrate Palaeontology. The invertebrate chordate classes are from Fishes of the World. While it is structured so as to reflect evolutionary relationships (sim… Meer weergeven

Cephalochordates, one of the three subdivisions of chordates, are small, "vaguely fish-shaped" animals that lack brains, clearly defined heads and specialized sense organs. These burrowing filte… Meer weergeven

There is still much ongoing differential (DNA sequence based) comparison research that is trying to separate out the simplest forms of chordates. As some lineages of the 90% of species that lack a bac… Meer weergeven

The closest relatives of the Chordates are believed to be the Hemichordates and Echinodermata, which together form the Ambulacraria. The Chordata and Ambulacraria together form the superphy… Meer weergeven