Editing Chelicerata (section)

===Relationships with other arthropods===
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{{clade
 |label1=[[Arthropoda]]
 |1={{clade
 |label1=[[Pancrustacea]]
 |1={{clade
 |1=[[Hexapoda]]
 |2=[[Crustacean|Crustacea]]
 }}
 |label2=[[Paradoxopoda]]
 |2={{clade
 |1=[[Myriapoda]]
 |2=Chelicerata
 }}
 }}
}}
</div>&nbsp;A recent view of chelicerate [[phylogeny]]<ref>{{cite book|vauthors=Giribet G, Edgecombe G|chapter= The Arthropoda: A Phylogenetic Framework|date= April 2013|title=Arthropod Biology and Evolution|pages= 17–40|doi=10.1007/978-3-642-36160-9_2|isbn= 978-3-642-36159-3}}</ref></div>
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{{clade
 |label1=[[Arthropoda]]
 |1={{clade
 |1=Chelicerata
 |label2=[[Mandibulata]]
 |2={{clade
 |1=[[Crustacean|Crustacea]]
 |2={{clade
 |1=[[Trilobita]]
 |label2=[[Tracheata]]
 |2={{clade
 |1=[[Hexapoda]]
 |2=[[Myriapoda]]
 }}
 }}
 }}
 }}
}}
</div>&nbsp;A "traditional" view of chelicerate [[phylogeny]]<ref>{{Cite journal|vauthors=Turbeville J, Pfeifer D, Field K, Raff R|title= The phylogenetic status of arthropods, as inferred from 18S rRNA sequences|journal=Molecular Biology and Evolution| volume=8|issue=5|date=September 1991|pages=669–686|doi=10.1093/oxfordjournals.molbev.a040677|pmid= 1766363|doi-access=free}}</ref><ref>{{Cite journal|vauthors=Giribet G, Ribera C|date=2000|title=A Review of Arthropod Phylogeny: New Data Based on Ribosomal DNA Sequences and Direct Character Optimization|journal=Cladistics|volume=16|issue=2|pages=204–231|doi=10.1111/j.1096-0031.2000.tb00353.x|pmid=34902954 |s2cid=84370269}}</ref></div>
The "traditional" view of the arthropod "family tree" shows chelicerates as less closely related to the other major living groups ([[crustacea]]ns; [[hexapoda|hexapods]], which includes [[insect]]s; and [[myriapod]]s, which includes [[centipede]]s and [[millipede]]s) than these other groups are to each other. Recent research since 2001, using both [[molecular phylogenetic]]s (the application of cladistic analysis to [[biochemistry]], especially to organisms' [[DNA]] and [[RNA]]) and detailed examination of how various arthropods' [[nervous system]]s develop in the [[embryo]]s, suggests that chelicerates are most closely related to myriapods, while hexapods and crustaceans are each other's closest relatives. However, these results are derived from analyzing only living arthropods, and including extinct ones such as [[trilobite]]s causes a swing back to the "traditional" view, placing trilobites as the sister-group of the [[Tracheata]] (hexapods plus myriapods) and chelicerates as least closely related to the other groups.<ref name="Jenner2006ChallengingReceivedWisdoms">{{citation
| author=Jenner, R.A.
| title=Challenging received wisdoms: Some contributions of the new microscopy to the new animal phylogeny
| journal=Integrative and Comparative Biology | volume=46| issue=2 | year=2006| pages=93–103 | doi=10.1093/icb/icj014 | pmid=21672726
| doi-access=free}}</ref>
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