Briggs, D. E. G., Clarkson, E. N. K., and Aldridge, R. J., 1983, The conodont
animal: Lethaia, v. 16, p. 1-14.
Klapper, G., and Ziegler, W., 1967, Evolutionary development of the Icriodus
latericresens group (Conodonta) in the Devonian of Europe and North
America: Palaeontographica, Series A, v. 127, p. 68-83.
Rexroad, C. B., 1958, The conodont homeomorphs Taphrognathus and
Streptognathodus: Journal of Paleontology, v. 32, p. 1158-1159.
Scott, A. J., and Collinson, C., 1959, Intraspecific variability in conodonts -
Palmatolepis glabra Ulrich & Bassler: Journal of Paleontology, v. 33,
p. 550-565.
