Diagnosis

English

eng

Bourgueticrinidae with sutures between cup ossicles indistinct; basals commonly fused. Number of radials and arms generally 5, rarely 4 to 7. Every second brachial articulation synostosial or cryptosynarthrial. Articulation between cup and column commonly constricted, distinct proximale absent. Facets of elliptical distal columnals with ligament fossae forming a low, fat figure 8.

Hess H (2011) Bourgueticrinina. In: Hess H, Messing CG, Ausich WI (Eds.), Treatise on Invertebrate Paleontology, Part T, Echinodermata 2 Revised, Crinoidea, vol. 3. University of Kansas Press, Lawrence, Kansas, pp. 146–158.