Scott, H. W., Levinson, S. A., van den Bold, W. A., Berdan, J., Shaver, R. H., Howe, H. V., Hessland, I., Swain, F. M., Hanai, T., Sohn, I. G., Sylvester-Bradley, P. C., Kesling, R. V., Moore, R. C., & Reyment, R. A. (1961). Part Q, Arthropoda 3, ch. 3, p. 180-358. Treatise on Invertebrate Paleontology. https://doi.org/10.17161/dt.v0i0.5621