Description from 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, 149-155.GIF file - 88.97 kB - 430 x 417 pixelsadded on 2013-08-26117 viewsEchinoidea taxaTetragramma basabensis Vaziri & Arab, 2013 †checked Kroh, Andreas 2013-08-26 This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 4.0 License
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