# Trinucleus

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> Markdown URL: https://mediated.wiki/source/Trinucleus.md
> Source: https://en.wikipedia.org/wiki/Trinucleus
> Source revision: 1354754146
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

{{Short description|Extinct genus of trilobites}}
{{Automatic taxobox
| fossil_range = {{fossilrange|461|466}}
| image = TrinucleusFimbriatus_AAScaife.jpg
| image_caption = ''Trinucleus fimbriatus''
| taxon = Trinucleus
| authority = [Murchison](/source/Roderick_Murchison), 1839
| subdivision_ranks = Species
| subdivision = }}

'''''Trinucleus''''' is a genus of [trilobite](/source/trilobite)s of the [order](/source/Order_(biology)) [Asaphida](/source/Asaphida). It is in the [family](/source/Family_(taxonomy)) [Trinucleidae](/source/Trinucleidae).<ref>{{Cite web|url=https://www.3d-fossils.ac.uk/fossilType.cfm?typSampleId=3244|title=Trinucleus UK Trinucleid Trilobite}}</ref>

Fossil specimens are found in the [Ordovician](/source/Ordovician) rocks of [Powys](/source/Powys), [Wales](/source/Wales).

This trilobite was blind and although the exact function of the pits and bars surrounding the cephalon are unknown, [anatomical](/source/Anatomy) evidence suggests this trilobite sifted [organic matter](/source/organic_matter) on the [seabed](/source/seabed).

The specimen shown has the lower side of the rostral plate and genal spines displaced from the cephalon.

==References==
{{Reflist}}

{{Taxonbar|from=Q4970089}}

Category:Trinucleidae
Category:Asaphida genera
Category:Fossils of Great Britain
Category:Ordovician trilobites
Category:Taxa named by Roderick Murchison

{{Asaphida-stub}}

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