Search The Directory The Web for Home > Science > Biology > Flora and Fauna > Animalia > Chordata New! Submit a site   Categories: Actinopterygii (4) Mammalia (430) Amphibia (4) Reptilia (100) Aves (430) Urochordata (5) Cartilaginous Fishes *(28)       whatUseek Collection Sites (submit a site ):   Give your site great placement in this category in as little as two business days!     whatUseek Directory Site Listings:   Chordata - Overview of the taxonomy of Phylum Chordata, which includes the well-known vertebrates (fishes, amphibians, reptiles, birds, mammals), hagfishes, tunicates, and lancelets.   Gnathostomata - Philippe Janvier's article about the jawed vertebrates in the Tree of Life website.   Hyperotreti - Hagfishes - Taxonomic overview of this group, including characteristics and phylogenetic relationships. The hagfish include four genera: Myxine, Neomyxine, Paramyxine, and Eptatretus.   Jawless Fishes and Chondrichthyes - Lecture notes cover the systematics and characteristics of hagfish, lampreys, and sharks.   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 links to information about subgroups and representative animals.   Subphylum Vertebrata - What makes a vertebrate a vertebrate? They have more in common than a backbone. Find out more in this site from the Animal Diversity Web.   Vertebrata - Introduction to the vertebrates and their classification, including the Hyperoartia, or lampreys, and the Gnathostomata, or jawed vertebrates. Help build the largest human-edited directory on the web.   Submit a Site - Open Directory Project - Become an Editor

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