{{Short description|Extinct genus of sea urchins}} {{Automatic taxobox | fossil_range = {{Fossil range|Oxfordian|Turonian}} | image = | image_caption = | taxon = Tetragramma | authority = L. 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, 1822) }}
'''''Tetragramma''''' is a genus of fossil sea urchins known from the Upper Jurassic (Oxfordian) to the Upper Cretaceous (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'' <small>Lambert, 1936</small> * ''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'' <small>Lambert, 1933</small> * ''Tetragramma bosei'' <small>Jones, 1938</small> * ''Tetragramma cornueli'' <small>Corroy, 1925</small> * ''Tetragramma depressum'' <small>Vaziri & Arab, 2013</small><ref name="Vaziri & Arab, 2013"/> * ''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'' <small>Lambert, 1935</small> * ''Tetragramma hourcqi'' <small>Collignon, 1950</small> * ''Tetragramma pomeraniae'' <small>Kongiel, 1957</small> * ''Tetragramma tafermense'' <small>Lambert, 1931</small> * ''Tetragramma tetratuberculatus'' <small>Vaziri & Arab, 2013</small><ref name="Vaziri & Arab, 2013"/> * ''Tetragramma variolare'' <small>(Brongniart, 1822)</small>
==References== {{Reflist}}
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Category:Phymosomatoida Category:Prehistoric sea urchin genera Category:Cretaceous echinoderms Category:Jurassic echinoderms
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