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Topics related to "Chordate"

Hemichordata
Hemichordata , small phylum of marine invertebrates closely related to both the echinoderms (phylum Echinodermata ) and chordates (phylum Chordata ). Acorn worms, class Enteropneusta, are the most common hemichordates. The body is composed of an anterior, conical proboscis, a short collar, and a l... Read more
lancelet
lancelet name for small, fishlike lower chordate (see Chordata ), also called amphioxus; it shows many affinities with the vertebrates. There are about 30 lancelet species, most belonging to the genus Brachiostoma (formerly Amphioxus ). Lancelets are usually about 1 in. (2.5 cm) long, with tran... Read more
Chordata
Chordata , phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals. The three features uniqu... Read more
Central Nervous System
Central Nervous System The central nervous system (CNS) consists of a brain and spinal (nerve) cord. Most invertebrates and all vertebrates have sensory and motor neurons that are linked by way of a CNS. Most invertebrates have a CNS that is organized into a brain and a longitudinal nerve cord th... Read more
animal
animal any member of the animal kingdom (kingdom Animalia), as distinguished from organisms of the plant kingdom (kingdom Plantae) and the kingdoms Fungi , Protista , and Monera in the five-kingdom system of classification. (Another classification system, suggested by genetic sequencing studi... Read more
tunicate
tunicate , marine animal of the phylum Chordata , which also includes the vertebrates. The adult form of most tunicates (also called urochordates) shows no resemblance to vertebrate animals, but such a resemblance is evident in the larva. The most familiar tunicates are the sea squirts, or ascidian... Read more
fish
fish limbless aquatic vertebrate animal with fins and internal gills. There are three living classes of fish: the primitive jawless fishes, or Agnatha; the cartilaginous (sharklike) fishes, or Chondrichthyes; and the bony fishes, or Osteichthyes. These groups, although quite different from one anot... Read more
fish
fish limbless aquatic vertebrate animal with fins and internal gills. There are three living classes of fish: the primitive jawless fishes, or Agnatha; the cartilaginous (sharklike) fishes, or Chondrichthyes; and the bony fishes, or Osteichthyes. These groups, although quite different from one anot... Read more

Encyclopedia entries related to "Chordate"

chordate
Book article from: World Encyclopedia chordate Any member of the Chordata, a large phylum of vertebrates and some marine invertebrates, which, at some stage, have rod-like...
chordates
Book article from: The Oxford Companion to the Earth ...adults, show the full complement of chordate characters. The cephalochordates include...organisms (about 7 cm long) in which the chordate characters are retained in the adult...and a brain. Although they retain the chordate characters as adults gill slits are present...
vertebrates
Book article from: The Oxford Companion to the Earth ...Vertebrates are a subphylum of the phylum Chordata and retain the chordate characters of a notochord (a longitudinal stiffening rod...them to become far more successful and widespread than their chordate relatives the urochordates and cephalochordates. These lower...
Arrow worms
Encyclopedia entry from: The Gale Encyclopedia of Science ...are thought to be distantly related to the phylum Chordata (which includes the vertebrates), but they lack many important chordate characteristics. Nevertheless, arrow worms do have a coelom (a fluid-filled body cavity), which is a characteristic...
William Bateson
Encyclopedia entry from: Encyclopedia of World Biography ...and 1884) under W. K. Brooks in America, Bateson published papers arguing for the position of Balanoglossusas a primitive chordate. Through this work he gained initial recognition as a biologist, and it led to his election as a Fellow of St. John's...
lancelet
Book article from: The Columbia Encyclopedia, Sixth Edition lancelet name for small, fishlike lower chordate (see Chordata ), also called amphioxus; it shows many affinities with the vertebrates. There are about 30 lancelet species...
Chordates
Encyclopedia entry from: The Gale Encyclopedia of Science ...occur during a part of the life of the animal, especially in the more recently evolved chordates, such as the vertebrates. Chordate animals have a closed circulatory system, in which blood is transported around the body inside veins and arteries of various...
Burgess shale
Book article from: World Encyclopedia ...Cambrian period. The silt has preserved traces of many of the soft bodies of sea creatures. The fossils include the oldest known chordate – a forerunner of all animals with backbones. They also include a number of kinds of animals that have completely...
Chordata
Book article from: The Columbia Encyclopedia, Sixth Edition ...group, comprising the acorn worms and their relatives, shows affinities with chordates and has sometimes been considered a chordate subphylum, but is now often classified in a phylum of its own, the Hemichordata . Subphylum Urochordata The tunicates are...
tunicate
Book article from: The Columbia Encyclopedia, Sixth Edition ...called a tadpole, has a muscular tail and is similar in appearance to a frog tadpole. The larva has the characteristic chordate features also found in the embryos of vertebrates: a dorsal, hollow nerve cord; a stiffening rod, or notochord; and gill...

Dictionary entries related to "Chordate"

chordate
Book article from: The Oxford Pocket Dictionary of Current English chor·date / ˈkôrdət; x2CC;dāt / • n. any animal of the phylum Chordata, including all vertebrates as well as the invertebrate sea squirts and lancelets, distinguished by the possession of a notochord at some stage during their development. • adj. of or
mammal
Book article from: A Dictionary of Ecology mammal A member of a class (Mammalia) of homoiothermic , chordate animals in which the young are fed milk secreted by mammae (which give the class its name). The head is supported by a flexible...
ventral
Book article from: A Dictionary of Ecology ventral 1. Of a plant or animal, the surface closest to the ground or substrate . 2. Of a plant organ, the adaxial surface. 3. Of a chordate animal, the surface or structure furthest from the notochord (in vertebrates, the spine).
Castle, William Ernest
Dictionary entry from: Complete Dictionary of Scientific Biography ...state of every cell from first cleavage through late gastrula. Castle took issue with the prevailing view of the origin of the chordate mesoderm. He concluded correctly that the mesoderm in Ciona and other primitive chordates originates from pouches in the infolded...
Pikaia
Book article from: A Dictionary of Zoology Pikaia An early chordate ( Chordata ) from the Burgess Shale that was possibly related to the modern amphioxus (see BRANCHIOSTOMIDAE ).
notochord
Book article from: A Dictionary of Biology ...elastic skeletal rod lying lengthwise beneath the nerve cord and above the alimentary canal in the embryos or adults of all chordate animals (see Chordata ). Its function is to strengthen and support the body and act as a protagonist for the muscles. It...
Amphibia
Book article from: A Dictionary of Ecology Amphibia( amphibians ) A chordate class represented today by just three groups, of which the salamanders (Urodela) and frogs and toads (Anura) are the best...
Beneden, Edouard Van
Dictionary entry from: Complete Dictionary of Scientific Biography ...endoblast is not derived from the enterocele and showed that the pericardium of tunicates is the ultimate remainder of the chordate celom. Van Beneden ’ s most famous contributions to science are his papers on the maturation and fertilization of...
Conklin, Edwin Grant
Dictionary entry from: Complete Dictionary of Scientific Biography ...thought to be only distantly related. Working several years later with the naturally pigmented egg of Cynthia , a primitive chordate, Conklin followed the distribution of the pigmented particles (originally from one region of the unfertilized egg) in the...

Related newspaper, magazine, and trade journal articles from HighBeam Research

Improved genome assembly and evidence-based global gene model set for the chordate Ciona intestinalis : new insight into intron and operon populations.(Research)
Magazine article from: Genome Biology (Online Edition); 10/14/2008; ; 700+ words ; ...10]; Erika Lindquist [11]; Toshinori Endo [2]; Kohji Hotta [12]; Kazuo Inaba [4] Background The tunicates are a chordate sister group of the vertebrates that has long been of great interest to evolutionary and developmental biologists. Vertebrates...
Early kin of vertebrates found in China. (fossil of Cathaymyrus diadexas found in southwest China may be oldest known chordate)(Brief Article)
Magazine article from: Science News; 11/16/1996; ; 700+ words ; ...paleontologists. It may be the oldest known chordate, the phylum to which humans and all...oldest fossil generally recognized as a chordate was the 520-million-year-old Pikaia...Yunnan Province and has a number of key chordate features, according to the researchers...
A REDESCRIPTION OF A RARE CHORDATE, METASPRIGGINA WALCOTTI SIMONETTA AND INSOM, FROM THE BURGESS SHALE (MIDDLE CAMBRIAN), BRITISH COLUMBIA, CANADA
Magazine article from: Journal of Paleontology; 3/1/2008; ; 700+ words ; ...Burgess Shale itself, characterized by the rather enigmatic Pikaia gracilens (Conway Morris, 1982, 1998) and the much rarer chordate described herein. Apart from this exceptionally preserved material, the fossil record effectively only begins in the Ordovician...
Cell signaling and transcription factor genes expressed during whole body regeneration in a colonial chordate.(Research article)(Report)
Magazine article from: BMC Developmental Biology; 10/12/2008; ; 700+ words ; ...vasculature toward the colony margins (Fig. 1a, arrowheads). Figure 1: Whole body regeneration (WBR) in the colonial chordate Botrylloides leachi . A : A B. leachi colony with numerous clonal modules; zooids (arrow). Zooids are embedded in a gelatinous...
LRRCE: a leucine-rich repeat cysteine capping motif unique to the chordate lineage.(Research article)(Report)
Magazine article from: BMC Genomics; 12/12/2008; ; 700+ words ; Authors: Hosil Park [1]; Julie Huxley-Jones [1,3]; Ray P Boot-Handford [1]; Paul N Bishop [1]; Teresa K Attwood [2]; Jordi Bella (corresponding author) [1] Background The leucine-rich repeat (LRR) is a widespread structural motif of 20-30 amino acids easily identifiable at the primary structure
New biology study findings have been published by M. Nomaksteinsky and colleagues.
Newspaper article from: Science Letter; 10/13/2009; 613 words ; ...Paris, France, "The origin of the chordate central nervous system (CNS) is unknown...reviewed in [2]) proposes that the chordate CNS arose by a dramatic process of dorsalization...latter is internalized in the collar as a chordate-like neural tube. Contrary to previous...
Data on developmental science discussed by researchers at Kyoto University.(Report)
Newspaper article from: Health & Medicine Week; 2/2/2009; 679 words ; ...developmental program in the ancestral chordate genome appear to be a major component...by examining a second non-vertebrate chordate genome. We conclude from this analysis that the ancient chordate included almost the same repertory of...
New genes in the evolution of the neural crest differentiation program.(Research)
Magazine article from: Genome Biology (Online Edition); 3/12/2007; ; 700+ words ; ...head at the anterior end of an ancestral chordate trunk. The three existing groups of...tube [3]. Resting on this archetypal chordate body plan, unique populations of cells...neural crest on the one hand and to basal chordate dorsal derivatives on the other has been...
Thyroid hormone receptor orthologues from invertebrate species with emphasis on Schistosoma mansoni.(Research article)(Report)
Magazine article from: BMC Evolutionary Biology; 8/29/2007; ; 700+ words ; ...signature sequence' (NTSS). In non-chordate TR homologues, it is PYIPSYMXXXGPEEP; while in chordate NTSS, three amino acids are deleted...position 16 (highlighted in red) is non-chordate TR specific. In this position an isoleucine...
Continued growth and cell proliferation into adulthood in the notochord of the appendicularian Oikopleura dioica.(Author abstract)
Magazine article from: The Biological Bulletin; 2/1/2008; ; 700+ words ; ...In most urochordates the larva has a chordate body plan with a trunk or head region...to deduce information about the common chordate ancestor. Recent genomic comparison...development are similar throughout the chordate radiation, but strikingly distinct patterns...