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
Halo dear heart @BrainHaines So good to see ya! @grammaphone defunct(ish cell phone proj). Fllw us here & @waterbears & FB chordata.desert
anodyne2art (Liz Gilbert) Fri, 06 Nov 2009 21:48:09 -0000
Halo dear heart @BrainHaines So good to see ya! @grammaphone defunct(ish cell phone proj). Fllw us here & @waterbears & FB chordata.desert
today-the phylum Chordata. yay zoology. I'm too tired for class today....so I tweet.
onerayofsunlite (Melissa Jo Brown) Fri, 06 Nov 2009 16:16:41 -0000
today-the phylum Chordata. yay zoology. I'm too tired for class today....so I tweet.
In our ongoing surveillance of flu among fellow members of chordata, we duly note a cat in Iowa has H1N1 flu.
MustangDoc (Keith Williamson) Fri, 06 Nov 2009 14:08:17 -0000
In our ongoing surveillance of flu among fellow members of chordata, we duly note a cat in Iowa has H1N1 flu.
Anna's Gamecock Tailgate Recipes: Arkansas: Animalia Chordata Mammalia Artiodactyla Suida Sus. A Razorback .. http://bit.ly/1gjjei #fb
GamecockAnthem (Gamecock Anthem) Fri, 06 Nov 2009 09:15:25 -0000
Anna's Gamecock Tailgate Recipes: Arkansas: Animalia Chordata Mammalia Artiodactyla Suida Sus. A Razorback .. http://bit.ly/1gjjei #fb
What are the divisions of the phylum Chordata? - Related review: http://ow.ly/15ZJhr
BiologyQandA (Biology Questions) Thu, 05 Nov 2009 23:25:42 -0000
What are the divisions of the phylum Chordata? - Related review: http://ow.ly/15ZJhr
Vou estudar Filo Chordata e fico livre u_u
brunawho (brunawho) Wed, 04 Nov 2009 23:59:14 -0000
Vou estudar Filo Chordata e fico livre u_u
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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