Tetragramma Explained

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)

Notes and References

1. Web site: Tetragramma Agassiz, 1838. The Echinoid Directory. Natural History Museum, London. 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. Book: Thompson. William R.. Fossil Echinoids of Texas: A Monograph of Fossil Sea Urchins. 2016. River Stix. 978-1617042782.