English definition of Vertebrata

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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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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..

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..

Sublapsarian :: Subkingdom (n.) One of the several primary divisions of either the animal, or vegetable kingdom, as, in zoology, the Vertebrata, Tunicata, Mollusca, Articulata, Molluscoidea, Echinodermata, Coelentera, and the Protozoa; in botany, the Phanerogamia, and the Cryptogamia..

Malacozoa :: Malacozoa (n. pl.) An extensive group of Invertebrata, including the Mollusca, Brachiopoda, and Bryozoa. Called also Malacozoaria..

Anallantoidea :: Anallantoidea (n. pl.) The division of Vertebrata in which no allantois is developed. It includes amphibians, fishes, and lower forms..

Perigastric :: Perigastric (a.) Surrounding the stomach; -- applied to the body cavity of Bryozoa and various other Invertebrata.

Invertebrata :: Invertebrata (n. pl.) A comprehensive division of the animal kingdom, including all except the Vertebrata..

Myelencephala :: Myelencephala (n. pl.) Same as Vertebrata.

Allantoidea :: Allantoidea (n. pl.) The division of Vertebrata in which the embryo develops an allantois. It includes reptiles, birds, and mammals..

Osteozoa :: Osteozoa (n. pl.) Same as Vertebrata.

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..

Molluscoidea :: Molluscoidea (n. pl.) A division of Invertebrata which includes the classes Brachiopoda and Bryozoa; -- called also Anthoid Mollusca.

Pisces :: Pisces (n. pl.) The class of Vertebrata that includes the fishes. The principal divisions are Elasmobranchii, Ganoidei, and Teleostei..

Acrania :: Acrania (n.) The lowest group of Vertebrata, including the amphioxus, in which no skull exists..

Myeloneura :: Myeloneura (n. pl.) The Vertebrata.

Vertebrate :: Vertebrate (n.) One of the Vertebrata.

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..

Chordata :: Chordata (n. pl.) A comprehensive division of animals including all Vertebrata together with the Tunicata, or all those having a dorsal nervous cord..

Ichthyopsida :: Ichthyopsida (n. pl.) A grand division of the Vertebrata, including the Amphibia and Fishes..