Tetragramma
Tetragramma is a genus of fossil sea urchins known from the Upper Jurassic to the Upper Cretaceous.Species include:
- Tetragramma antsingyensis Lambert, 1936
- Tetragramma basabensis Vaziri & Arab, 2013
- Tetragramma besairiei Lambert, 1933
- Tetragramma bosei Jones, 1938
- Tetragramma cornueli Corroy, 1925
- Tetragramma depressum Vaziri & Arab, 2013
- Tetragramma donaldtrumpi Thompson, 2016
- Tetragramma giganteum Lambert, 1935
- Tetragramma hourcqi Collignon, 1950
- Tetragramma pomeraniae Kongiel, 1957
- Tetragramma tafermense Lambert, 1931
- Tetragramma tetratuberculatus Vaziri & Arab, 2013
- Tetragramma variolare
