Long-Term Ecological Research Network - LTER

Phylum Chordata Phylum Chordata- Brief introduction to the chordates, defined as organisms that possess a structure called a notochord, at least during some part of their development. Includes li… Subphylum Vertebrata Subphylum Vertebrata- What makes a vertebrate a vertebrate? They have more in common than a backbone. Find out more from the Animal Diversity Web. Tree of Life: Gnathostomata Tree of Life: Gnathostomata- Philippe Janvier's article about this clade which differs from all other vertebrates in having a vertically biting device, the jaws. North American Wildlife North American Wildlife- Includes photographs and information on a wide range of mammals and reptiles from Canada, the United States and Mexico. Includes fact sheets and distribut… Database of Vertebrates and Centres of Vertebrate Diversity in Mozambique Database of Vertebrates and Centres of Vertebrate Diversity in Mozambique- The Database includes almost 3500 vertebrate species, taxonomic information, English, Portuguese and ver… Phylum Hemichordata, Urochordata and Cephalochordata Phylum Hemichordata, Urochordata and Cephalochordata- Illustrated description of these three phyla, and the three classes within Urochordata. Also information on the larval stages… Chordata Chordata- Overview of the taxonomy of Phylum Chordata, which includes the well-known vertebrates (fishes, amphibians, reptiles, birds, mammals), hagfishes, tunicates, and lancelet… Vertebrata Vertebrata- Introduction to the vertebrates and their classification, including the Hyperoartia, or lampreys, and the Gnathostomata, or jawed vertebrates.