Hunter, A.W.; Oji, T.; Okazaki, Y. (2011). "The occurrence of the pseudoplanktonic crinoids Pentacrinites and Seirocrinus from the Early Jurassic Toyora Group, western Japan". Paleontological Research. 15 (1): 12–22. doi:10.2517/1342-8144-15.1.012. S2CID130057366.
Hunter, A.W.; Oji, T.; Okazaki, Y. (2011). "The occurrence of the pseudoplanktonic crinoids Pentacrinites and Seirocrinus from the Early Jurassic Toyora Group, western Japan". Paleontological Research. 15 (1): 12–22. doi:10.2517/1342-8144-15.1.012. S2CID130057366.