Definition of vertebrata
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Vertebrata (n. pl.) One of the grand divisions of the animal kingdom, comprising all animals that have a backbone composed of bony or cartilaginous vertebrae, together with Amphioxus in which the backbone is represented by a simple undivided notochord. The Vertebrata always have a dorsal, or neural, cavity above the notochord or backbone, and a ventral, or visceral, cavity below it. The subdivisions or classes of Vertebrata are Mammalia, Aves, Reptilia, Amphibia, Pisces, Marsipobranchia, and Lep
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Marsipobranchia ::
Marsipobranchia (n. pl.) A class of Vertebrata, lower than fishes, characterized by their purselike gill cavities, cartilaginous skeletons, absence of limbs, and a suckerlike mouth destitute of jaws. It includes the lampreys and hagfishes. See Cyclostoma, and Lamprey. Called also Marsipobranchiata, and Marsipobranchii..
Craniota ::
Craniota (n. pl.) A comprehensive division of the Vertebrata, including all those that have a skull..
Vertebrated ::
Vertebrated (a.) Of or pertaining to the Vertebrata; -- used only in the form vertebrate.
Anallantoidea ::
Anallantoidea (n. pl.) The division of Vertebrata in which no allantois is developed. It includes amphibians, fishes, and lower forms..
Annulosa ::
Annulosa (n. pl.) A division of the Invertebrata, nearly equivalent to the Articulata. It includes the Arthoropoda and Anarthropoda. By some zoologists it is applied to the former only..
Perigastric ::
Perigastric (a.) Surrounding the stomach; -- applied to the body cavity of Bryozoa and various other Invertebrata.
Leptocardia ::
Leptocardia (n. pl.) The lowest class of Vertebrata, including only the Amphioxus. The heart is represented only by a simple pulsating vessel. The blood is colorless; the brain, renal organs, and limbs are wanting, and the backbone is represented only by a simple, unsegmented notochord. See Amphioxus..
Vertebrata ::
Vertebrata (n. pl.) One of the grand divisions of the animal kingdom, comprising all animals that have a backbone composed of bony or cartilaginous vertebrae, together with Amphioxus in which the backbone is represented by a simple undivided notochord. The Vertebrata always have a dorsal, or neural, cavity above the notochord or backbone, and a ventral, or visceral, cavity below it. The subdivisions or classes of Vertebrata are Mammalia, Aves, Reptilia, Amphibia, Pisces, Marsipobranchia, and Lep
Acrania ::
Acrania (n.) The lowest group of Vertebrata, including the amphioxus, in which no skull exists..
Malacozoa ::
Malacozoa (n. pl.) An extensive group of Invertebrata, including the Mollusca, Brachiopoda, and Bryozoa. Called also Malacozoaria..
Invertebrata ::
Invertebrata (n. pl.) A comprehensive division of the animal kingdom, including all except the Vertebrata..
Invertebrate ::
Invertebrate (a.) Destitute of a backbone; having no vertebrae; of or pertaining to the Invertebrata.
Chordata ::
Chordata (n. pl.) A comprehensive division of animals including all Vertebrata together with the Tunicata, or all those having a dorsal nervous cord..
Mammalia ::
Mammalia (n. pl.) The highest class of Vertebrata. The young are nourished for a time by milk, or an analogous fluid, secreted by the mammary glands of the mother..
Porifera ::
Porifera (n. pl.) A grand division of the Invertebrata, including the sponges; -- called also Spongiae, Spongida, and Spongiozoa. The principal divisions are Calcispongiae, Keratosa or Fibrospongiae, and Silicea..
Coelenterata ::
Coelenterata (n. pl.) A comprehensive group of Invertebrata, mostly marine, comprising the Anthozoa, Hydrozoa, and Ctenophora. The name implies that the stomach and body cavities are one. The group is sometimes enlarged so as to include the sponges..
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