Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Plural form of
cephalochordate .
Etymologies
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Examples
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So the latest phylogeny, with clearly the best taxon sampling, shows that cephalochordates are the sister group to vertebrates.
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Recent developments in molecular phylogenies, though, strongly suggest that appearances are deceiving and we vertebrates are more closely related to the urochordates than to the cephalochordates, implying that some interesting evolutionary phenomena must have been going on in the urochordates.
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It actually shows cephalochordates and vertebrates together.
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Recent developments in molecular phylogenies, though, strongly suggest that appearances are deceiving and we vertebrates are more closely related to the urochordates than to the cephalochordates, implying that some interesting evolutionary phenomena must have been going on in the urochordates.
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Fish lack the intrinsic coagulation system, Jawless fish lack Factor X and the cephalochordates lack pretty much everything except a thrombin-like protein, but they can still clot their haemolymph.
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Observations of gene expression during gastrulation are revealing deeper similarities that are common in all deuterostomes—not just vertebrates, but also the invertebrate chordates tunicates and cephalochordates and echinoderms.
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Observations of gene expression during gastrulation are revealing deeper similarities that are common in all deuterostomes—not just vertebrates, but also the invertebrate chordates tunicates and cephalochordates and echinoderms.
The evolution of deuterostome gastrulation - The Panda's Thumb 2005
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Modern chordates are a broad phylum of animals that includes three subphyla: cephalochordates such as the fish-like lancelets, or amphioxus; urochordates such as sea squirts; and vertebrates such as lamprey and humans.
Scientific American 2010
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From these animals evolved the ancestors of the three modern groups, respectively stem cephalochordates, stem urochordates and stem vertebrates.
Scientific American 2010
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From these animals evolved the ancestors of the three modern groups, respectively stem cephalochordates, stem urochordates and stem vertebrates.
Scientific American 2010
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