cephalochordate


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ceph·a·lo·chor·date

 (sĕf′ə-lə-kôr′dāt′)
n.

[From New Latin Cephalochordāta, subphylum name : cephalo- + Chordāta, chordate phylum; see chordate.]

ceph′a·lo·chor′date adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

cephalochordate

(ˌsɛfələʊˈkɔːdeɪt)
n
(Animals) any chordate animal of the subphylum Cephalochordata, having a fishlike body and no vertebral column; lancelet
adj
(Animals) of, relating to, or belonging to the Cephalochordata
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ceph·a·lo·chor·date

(sĕf′ə-lə-kôr′dāt′)
Any of various primitive chordate animals that lack a true vertebral column, having a notochord instead. The lancelets are cephalochordates.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.cephalochordate - fish-like animals having a notochord rather than a true spinal columncephalochordate - fish-like animals having a notochord rather than a true spinal column
chordate - any animal of the phylum Chordata having a notochord or spinal column
amphioxus, lancelet - small translucent lancet-shaped burrowing marine animal; primitive forerunner of the vertebrates
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The amphioxus genome illuminates vertebrate origins and cephalochordate biology.
Given the structural similarities, it is believed that all these MHC I or MHC I-like molecules have evolutionary lineage with a common ancestor.[sup][13] The MHC locus has been found in all jawed vertebrates, however, the proto-MHC could trace back to the cephalochordate (amphioxus) and jawless vertebrate lineages.[sup][110],[111],[112] MHC II genes were firstly derived from proto-MHC by exon shuffling, combining an Ig-like C domain with a peptide binding region.[sup][113] Subsequently, another peptide binding region exon was added to MHC II [sz] chain to form the MHC I heavy chain, which happened at approximately 500 million years ago.
Terakita, "Cephalochordate melanopsin: evolutionary linkage between invertebrate visual cells and vertebrate photosensitive retinal ganglion cells," Current Biology, vol.
In muddy sediments the cephalochordate remains on the sediment surface.
At present, the significance of these new findings is obscured by uncertainty about whether characters in the genus Asymmetron are more likely to be primitive or derived within the cephalochordates. It will, therefore, be important to resolve the main course of cephalochordate evolution by further phylogenetic analyses with nuclear genes and by sequencing the genome from a species of Asymmetron.
The cephalochordate notochord is one example of an evolutionary novelty because it is made up of muscle cells that are innervated through contact with the ventral aspect of the nerve cord (Flood, 1975).
We now report that the limited taxonomic distribution of animals with endogenous GFPs may be partially due to inadequate sampling efforts, because we have found such molecules in the cephalochordate amphioxus.
The enteropneust and cephalochordate pharynx share serially paired gill slits in the pharynx that are framed on either side by collagenous gill arches, and parted down the middle by a secondary gill (or tongue) bar.
In addition an InsR-homolog sequence isolated, so far, from one cephalochordate, Branchiostoma lanceolatum, as well as InsRs, IGF-I-Rs, or InsR-homologs from selected vertebrates (human, mouse and rat) were highly similar to the sponge sequences.
The caudal tail and anterior regions of cephalochordates regenerate with high fidelity, but as the amputation plane moves toward the pharynx region, the regenerative abilities decline and are completely absent in the pharynx (Somorjai et al., 2012).