Chapter

Cox, L.R., Newell, N.D., Boyd, D.W., Branson, C.C., Casey, R., Chavan, A., Coogan, A.H., Dechaseaux, C., Fleming, C.A., Haas, F., Hertlein, L.G., Kauffman, E.G., Keen, A.M., LaRocque, A., McAlester, A.L., Moore, R.C., Nuttall, C.P., Perkins, B.F., Puri, H.S., Smith, L.A., Soot-Ryen, T., Stenzel, H.B., Trueman, E.R., Turner, R.D. & Weir, J. 1969. (Systematic Descriptions). In R.C. Moore (ed.), Treatise Invert. Paleont. (N) 2: N491-N868.

New: Subsequent rank (orig. spell.)

New: Subsequent spelling

New: Description/Diagnosis in English