Tetragramma

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

Tetragramma is a genus of fossil sea urchins known from the Upper Jurassic (Oxfordian) to the Upper Cretaceous (Turonian).[1]

Species

Species include:[2]

• Tetragramma antsingyensis Lambert, 1936
• Tetragramma basabensis Vaziri & Arab, 2013[3]
• Tetragramma besairiei Lambert, 1933
• Tetragramma bosei Jones, 1938
• Tetragramma cornueli Corroy, 1925
• Tetragramma depressum Vaziri & Arab, 2013[3]
• Tetragramma donaldtrumpi Thompson, 2016[4]
• Tetragramma giganteum Lambert, 1935
• Tetragramma hourcqi Collignon, 1950
• Tetragramma pomeraniae Kongiel, 1957
• Tetragramma tafermense Lambert, 1931
• Tetragramma tetratuberculatus Vaziri & Arab, 2013[3]
• Tetragramma variolare (Brongniart, 1822)

References

1. "Tetragramma Agassiz, 1838". The Echinoid Directory. Natural History Museum, London. Retrieved 2017-01-22.
2. 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
3. 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.
4. Thompson, William R. (2016). Fossil Echinoids of Texas: A Monograph of Fossil Sea Urchins. River Stix. ISBN 978-1617042782.