Gourt > Science > Biology > Flora and Fauna > Animalia > Chordata (483)
Chordates (phylum Chordata) are a group of animals that includes the vertebrates, together with several closely related invertebrates. They are united by having, at some time in their life, a notochord, a hollow dorsal nerve cord, pharyngeal slits, an endostyle, and a muscular tail extending past the anus. Some scientists argue, however, that the true qualifier should be pharyngeal pouches rather than slits.
The phylum Chordata is broken down into three subphyla: Urochordata, Cephalochordata, and Vertebrata. Urochordate larvae have a notochord and a nerve cord but they are lost in adulthood. Cephalochordates have a notochord and a nerve cord but no vertebra. In all vertebrates except for Hagfish, the dorsal hollow nerve cord has been surrounded with cartilaginous or bony vertebrae and the notochord generally reduced.
The chordates and two sister phyla, the hemichordates and the echinoderms, make up the deuterostomes, a superphylum.
More on [ Chordate ]
Chordates :: Zoology
Vertebrates :: Paleontology
Wave Chordata has account (from @euskir) and don't understand this at all but suss something about it as a tool for working together.
salmagundi101 (Sal Knowles) Mon, 16 Nov 2009 05:31:34 -0000
Wave Chordata has account (from @euskir) and don't understand this at all but suss something about it as a tool for working together.
@ElliFordyce2 I am a bit allergic to it! @anodyne2art (Chordata is her non profit) is working on a million things but this has to do with
salmagundi101 (Sal Knowles) Sat, 14 Nov 2009 04:51:05 -0000
@ElliFordyce2 I am a bit allergic to it! @anodyne2art (Chordata is her non profit) is working on a million things but this has to do with
@anacarolbadaro eu sei oq eh um chordata
caioalfonso (Caio Alfonso) Fri, 13 Nov 2009 22:58:30 -0000
@anacarolbadaro eu sei oq eh um chordata
animalia chordata mammalia primates hominidae homo sapiens YEAH
zombieface (Amanda Grant) Fri, 13 Nov 2009 21:46:25 -0000
animalia chordata mammalia primates hominidae homo sapiens YEAH
Lots going on right now! 3 songs from our new album *chordata* are available for listening at our myspace and the... http://bit.ly/13jRwS
ReVoLtReVoLt (ReVoLtReVoLt) Thu, 12 Nov 2009 22:23:17 -0000
Lots going on right now! 3 songs from our new album *chordata* are available for listening at our myspace and the... http://bit.ly/13jRwS
Dissecting chordata tonight. Supa sweet. Then its radical expression, functions, and rational exponents! Yay! [Love Algebra...and dissecting
DinaLive (Dina Brandt) Wed, 11 Nov 2009 22:45:19 -0000
Dissecting chordata tonight. Supa sweet. Then its radical expression, functions, and rational exponents! Yay! [Love Algebra...and dissecting
Chordata - Overview of the taxonomy of Phylum Chordata, which includes the well-known vertebrates (fishes, amphibians, reptiles, birds, mammals), hagfishes, tunicates, and lancelets.
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Gnathostomata - Philippe Janvier's article about the jawed vertebrates in the Tree of Life website.
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.
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