Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Any of the
primitive fishlike creatures , of the subphylumCephalochordata , including thelancets , that lack a truespine but have anotochord which, in the case of cephalochordates, reaches into the head, contrary to theUrochordata - adjective Of or pertaining to these creatures.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun fish-like animals having a notochord rather than a true spinal column
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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In the middle is a cephalochordate, Amphioxus, also a filter feeder, but capable of free swimming.
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In the middle is a cephalochordate, Amphioxus, also a filter feeder, but capable of free swimming.
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In the invertebrate cephalochordate Amphioxus, there is a family of very immunoglobulin like-molecules, Variable domain Chitin Binding Proteins, which are involved in innate immunity.
Stuck on you, biological Velcro and the evolution of adaptive immunity - The Panda's Thumb 2006
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In summary, the cephalochordate affinity of Pikaia is at best only weakly indicated by the characters visible in fossils discovered so far.
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FGFRL1, the gene for the fifth member of the fibroblast growth factor receptor (FGFR) family, is found in all vertebrates from fish to man and in the cephalochordate amphioxus.
BioMed Central - Latest articles Lei Zhuang 2009
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ther diminishes the credibility of the cephalochordate—echinoderm link
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