[1]
R. Mooi, A. Kroh, and D. K. Srivastava, “Phylogenetic re-evaluation of fossil and extant micro-echinoids with revision of Tridium, Cyamidia, and Lenicyamidia Echinoidea: Clypeasteroida)”, Zootaxa, vol. 3857, no. 4, pp. 501–526, Sep. 2014.