# Discinida

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> Source: https://en.wikipedia.org/wiki/Discinida
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{{Short description|Order of brachiopods}}
{{Automatic taxobox
| fossil_range = {{Fossil range|Cambrian Stage 2|Recent|ref=<ref>{{Cite web |url=http://palaeos.com/metazoa/brachiopoda/discinida.html |title=Discinida |url-status=live |accessdate=1 September 2016|archive-url=https://web.archive.org/web/20130306144312/http://palaeos.com:80/metazoa/brachiopoda/discinida.html |archive-date=2013-03-06 }}</ref>}}
| taxon = Discinida
| authority =
| subdivision_ranks = Superfamilies
| subdivision = {{collapsible taxon list
| [Discinoidea](/source/Discinoidea) | |{{nested taxon list
  |[Discinidae](/source/Discinidae) | |{{linked species list
    |''[Discina](/source/Discina_(brachiopod))''|
    |Discinisca|
    |Discradisca |
    |Pelagodiscus |
     }}
  | †[Trematidae](/source/Trematidae)}}
| † [Botsfordioidea](/source/Botsfordioidea)| |...
|†[Acrotheloidea](/source/Acrotheloidea) | (?) |...
}}
}}

'''Discinida''' is an order of [brachiopod](/source/brachiopod)s comprising the extant superfamily [Discinoidea](/source/Discinoidea), and the extinct superfamilies [Botsfordioidea](/source/Botsfordioidea) (early—mid-Cambrian) and [Acrotheloidea](/source/Acrotheloidea) (early Cambrian–Early Ordovician).<ref>{{cite book|last1=Ruppert|first1=E.E|author2=Fox, R.S.|author3=Barnes, R.D|title=Invertebrate Zoology|publisher=Brooks/Cole|edition=7|isbn=978-0-03-025982-1|year=2004|pages=[https://archive.org/details/isbn_9780030259821/page/821 821–829]|url-access=registration|url=https://archive.org/details/isbn_9780030259821/page/821}}</ref>  It represents a sister taxon to the [Lingulids](/source/Lingulida), and is possibly [paraphyletic](/source/paraphyletic) with respect to the [Acrotretoids](/source/Acrotretida).<ref name="auto">{{cite journal|doi=10.1098/rstb.1998.0350|title=Chemico-structural phylogeny of the discinoid brachiopod shell|journal=Philosophical Transactions of the Royal Society B: Biological Sciences|volume=353|issue=1378|pages=2005–2038|year=1998|last1=Williams|first1=A.|last2=Cusack|first2=M.|last3=Buckman|first3=J. O.|pmc=1692430}}</ref>{{check|date=October 2017}}—or the acrotretids are paraphyletic with respect to it.<ref>{{cite journal | url = http://rstb.royalsocietypublishing.org/content/royptb/337/1279/83.full.pdf| title = Structure of the organo-phosphatic shell of the brachiopod Discina| journal = Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences| date = 1992-07-29| bibcode = 1992RSPTB.337...83W| last1 = Williams| first1 = Alwyn| last2 = MacKay| first2 = Sarah| last3 = Cusack| first3 = Maggie| volume = 337| issue = 1279| page = 83| doi = 10.1098/rstb.1992.0086}}></ref>  The group displays a broad range of shell structures, some of which incorporate substantial organic or silicified components.<ref name="auto"/>

==References==
{{Reflist}}

{{Taxonbar|from=Q16888374}}

Category:Discinida
Category:Brachiopod orders
Category:Extant Cambrian first appearances

{{brachiopod-stub}}

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Adapted from the Wikipedia article [Discinida](https://en.wikipedia.org/wiki/Discinida) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Discinida?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.