Fig. 24
From: Crinoids from the Middle Jurassic (Bajocian–Lower Callovian) of Ardèche, France
Cyrtocrinus praenutans n. sp., Lower Bathonian, Bed 1, La Pouza. Series of cups (p, q, r), first primibrachials (i–o) and second primibrachials (a–h) to illustrate differences in size, shape, and ornamentation. Cups are shown in side view; in contrast to Fig. 15, primibrachials are shown in aboral view with synostosial facets exposed; first primibrachials are oriented with distal side upward mounted on muscular facets, second primibrachials show adoral facet facing downward. Asterisks indicate position of hidden proximal muscular facet articulating to radial. a M11022. b M11009. c 11020. d M11013, note narrow proximal synostosial facet. e M11007. f M11021. g M11018. h M11008. i M11030. j M11029. k M11025. l M11028, note cryptosyzygial distal facet. m M11031. n M11026. o M11027, note concave central part of facet. p M11002. q M11006. r M11001. Scale bar 1 mm