Tetragramma

Tetragramma Temporal range: Oxfordian–Turonian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Echinoidea
Order:	† Phymosomatoida
Family:	† Diplopodiidae
Genus:	† Tetragramma L. Agassiz, 1838
Type species
Tetragramma variolare (Brongniart, 1822)
Synonyms [1]
AcanthechinopsisGregory, 1906

Tetragramma is a genus of fossil sea urchins known from the Upper Jurassic (Oxfordian) to the Upper Cretaceous (Turonian). ^[2]

Species

Species include: ^[3]

• Tetragramma antsingyensis Lambert, 1936
• Tetragramma basabensis Vaziri & Arab, 2013 ^[4]
• Tetragramma besairiei Lambert, 1933
• Tetragramma bosei Jones, 1938
• Tetragramma cornueli Corroy, 1925
• Tetragramma depressum Vaziri & Arab, 2013 ^[4]
• Tetragramma donaldtrumpi Thompson, 2016 ^[5]
• Tetragramma giganteum Lambert, 1935
• Tetragramma hourcqi Collignon, 1950
• Tetragramma pomeraniae Kongiel, 1957
• Tetragramma tafermense Lambert, 1931
• Tetragramma tetratuberculatus Vaziri & Arab, 2013 ^[4]
• Tetragramma variolare (Brongniart, 1822)

References

1. Kroh A, Mooi R, eds. (2025). "Tetragramma L. Agassiz, 1838 †". World Echinoidea Database. World Register of Marine Species . Retrieved 30 May 2025.
2. "Tetragramma Agassiz, 1838". The Echinoid Directory. Natural History Museum, London. Retrieved 2017-01-22.
3. 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
4. Vaziri, M. R.; Arab, A. L. (2013). "Echinoids of the genus Tetragramma Agassiz (Phymosomatoida) from the Aptian sediments of the Basab region, northwest of Kerman, Iran". Journal of Sciences, Islamic Republic of Iran. 24 (2): 149–155.
5. Thompson, William R. (2016). Fossil Echinoids of Texas: A Monograph of Fossil Sea Urchins. River Stix. ISBN   978-1617042782.