1. Shell-Breaking Predation through Time
2. The Mesozoic marine revolution: evidence from snails, predators and grazers
3. Van Sant J. F. and Lane N. G. 1964. Crawfordsville (Indiana) crinoid studies. Contr. Univ. Kansas Paleontol. Echinodermata, Art. 7. 136 pp.
4. Ulrich E. O. 1925. New classification of the “Heterocrinidae.” Pp. 82–104. In: Foerste A. F. , ed. Upper Ordovician faunas of Ontario and Quebec. Mem. Can. Geol. Surv. 138.
5. Signor P. W. and Brett C. E. 1983. Impact of the mid-Paleozoic radiation of durophagous predators: evidence from brachipods, nautiloids and crinoids. Abst. 96th Ann. Mt. Geol. Soc. Am. Abstr. P. 688.