Editing Arachnid (section)

===Fossil history===
{{further|Evolution of spiders|Evolution of scorpions}}
[[File:Goniotarbus angulatus holotype fossil dorsal ventral.jpg|thumb|Fossil ''Goniotarbus angulatus'' ([[Phalangiotarbida]])]]
[[File:Kreischeria Vienna.jpg|thumb|Fossil of ''[[Kreischeria]]'' (Trigonotarbida)]]
The [[Uraraneida]] are an extinct order of spider-like arachnids from the [[Devonian]] and [[Permian]].<ref name=SeldSheaSutt08>{{Citation |last1=Selden |first1=P.A. |last2=Shear |first2=W.A. |last3=Sutton |first3=M.D. |date=2008 |title=Fossil evidence for the origin of spider spinnerets, and a proposed arachnid order |journal=Proceedings of the National Academy of Sciences |volume=105 |issue=52 |pages=20781–20785 |doi=10.1073/pnas.0809174106 |name-list-style=amp |pmid=19104044 |pmc=2634869|bibcode=2008PNAS..10520781S |doi-access=free }}</ref>

A fossil arachnid in 100 million year old (mya) [[amber]] from Myanmar, ''[[Chimerarachne yingi]]'', has spinnerets (to produce silk); it also has a tail, like the [[Palaeozoic]] Uraraneida, some 200 million years after other known fossils with tails. The fossil resembles the most primitive living spiders, the [[Mesothelae|mesotheles]].<ref>{{cite news |last1=Briggs |first1=Helen |title='Extraordinary' fossil sheds light on origins of spiders |url=https://www.bbc.co.uk/news/science-environment-42945813 |access-date=9 June 2018 |agency=BBC |date=5 February 2018}}</ref><ref name="WangDunlop2018" />