Taxon - Links and literature
Sumrall C. D., Sprinkle J., Guensburg T. E., Dattilo B. F. (2012): Early Ordovician Mitrates and a Possible Solute (Echinodermata) from the Western United States, Journal of Paleontology 86/4 [as Drepanocystis dubius Sumrall, Sprinkle, Guensburg & Dattilo, 2012]