# Tetragramma

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{{Short description|Extinct genus of sea urchins}}
{{Automatic taxobox
| fossil_range = {{Fossil range|Oxfordian|Turonian}}
| image = 
| image_caption =
| taxon = Tetragramma
| authority = [L. Agassiz](/source/Louis_Agassiz), 1838
| synonyms_ref = <ref>{{cite WoRMS |year=2025 |title=''Tetragramma'' L. Agassiz, 1838 † |id=512465 |access-date=30 May 2025 |db=Echinoidea}}</ref>
| synonyms =
* ''Acanthechinopsis'' <small>Gregory, 1906</small> 
| type_species = ''Tetragramma variolare''
| type_species_authority = ([Brongniart](/source/Alexandre_Brongniart), 1822)
}}

'''''Tetragramma''''' is a genus of fossil [sea urchin](/source/sea_urchin)s known from the Upper Jurassic ([Oxfordian](/source/Oxfordian_(stage))) to the Upper Cretaceous ([Turonian](/source/Turonian)).<ref>{{cite web|url=http://www.nhm.ac.uk/our-science/data/echinoid-directory/taxa/taxon.jsp?id=1424|title=Tetragramma Agassiz, 1838|work=The Echinoid Directory|publisher= Natural History Museum, London|access-date=2017-01-22}}</ref>

==Species==
Species include:<ref name="Kroh 2010">Kroh, A. (2010). ''Tetragramma'' L. Agassiz, 1838 †. In: Kroh, A. & Mooi, R. (2015) World Echinoidea Database. Accessed at http://www.marinespecies.org/Echinoidea/aphia.php?p=taxdetails&id=512465 on 2017-01-22</ref>

* ''[Tetragramma antsingyensis](/source/Tetragramma_antsingyensis)'' <small>Lambert, 1936</small>
* ''[Tetragramma basabensis](/source/Tetragramma_basabensis)'' <small>Vaziri & Arab, 2013</small><ref name="Vaziri & Arab, 2013">{{cite journal|last1=Vaziri|first1= M. R.|last2= Arab|first2= A. L.|year=2013|title= Echinoids of the genus ''Tetragramma'' Agassiz (Phymosomatoida) from the Aptian sediments of the Basab region, northwest of Kerman, Iran|journal= Journal of Sciences, Islamic Republic of Iran|volume=24|issue=2|pages=149–155|url=https://jsciences.ut.ac.ir/pdf_32081_7166e1c580c64b1edf8eb503cd1e833a.html}}</ref>
* ''[Tetragramma besairiei](/source/Tetragramma_besairiei)'' <small>Lambert, 1933</small>
* ''[Tetragramma bosei](/source/Tetragramma_bosei)'' <small>Jones, 1938</small>
* ''[Tetragramma cornueli](/source/Tetragramma_cornueli)'' <small>Corroy, 1925</small>
* ''[Tetragramma depressum](/source/Tetragramma_depressum)'' <small>Vaziri & Arab, 2013</small><ref name="Vaziri & Arab, 2013"/>
* ''[Tetragramma donaldtrumpi](/source/Tetragramma_donaldtrumpi)'' <small>Thompson, 2016</small><ref>{{cite book|last1=Thompson|first1=William R.|title=Fossil Echinoids of Texas: A Monograph of Fossil Sea Urchins|date=2016|publisher=River Stix|isbn=978-1617042782}}</ref>
* ''[Tetragramma giganteum](/source/Tetragramma_giganteum)'' <small>Lambert, 1935</small>
* ''[Tetragramma hourcqi](/source/Tetragramma_hourcqi)'' <small>Collignon, 1950</small>
* ''[Tetragramma pomeraniae](/source/Tetragramma_pomeraniae)'' <small>Kongiel, 1957</small>
* ''[Tetragramma tafermense](/source/Tetragramma_tafermense)'' <small>Lambert, 1931</small>
* ''[Tetragramma tetratuberculatus](/source/Tetragramma_tetratuberculatus)'' <small>Vaziri & Arab, 2013</small><ref name="Vaziri & Arab, 2013"/>
* ''[Tetragramma variolare](/source/Tetragramma_variolare)'' <small>(Brongniart, 1822)</small>

==References==
{{Reflist}}

{{Taxonbar|from=Q23005736}}

Category:Phymosomatoida
Category:Prehistoric sea urchin genera
Category:Cretaceous echinoderms
Category:Jurassic echinoderms

{{Paleo-echinoidea-stub}}

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