Estoniadiscus is an extinct genus of animal of unknown classification, possibly belonging to Bilateria, from the Early Cambrian (Nemakit-Daldynian–Atdabanian) of Estonia.Jankauskas, T., Posti, E. 1973. Micropaleontological characteristic of the stratotype sections of the Estonian Lower Cambrian. Proceedings of the Academy of Sciences of the Estonian SSR. Chemistry and Geology 22, 2, 143-148.Babcock, L.E. and Robison, R.A. 1988. Taxonomy and paleobiology of some Middle Cambrian Scenella (Cnidaria) and hyolithids (Mollusca) from western North America. University of Kansas paleontological contributions, 121: 22 Originally described as a species of Scenella in 1888a,Schmidt, Fr. 1888. Über eine neuentdeckte untercambrische Fauna in Estland. Mémoires de l´Académie Impériale des Sciences de St.-Petersbourg 36, 2, 1-28. it was redescribed as a possible stem-brachiopod in 2003.
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