Fig. 5
From: Balanocrinus and other crinoids from Late Jurassic mudstones of France and Switzerland
Balanocrinus brachiospina n. sp., early Late Oxfordian, Savigna 2b. a Second primibrachial, M11247, a1 proximal, a2 distal. b Adoral view of second primibrachial, M11248. c Aboral view of second primibrachial and attached first secundibrachial with distal synostosial facet, M11249. d Proximal view of radial with low muscle fossae, note nerve canal on lateral synostosial facets, M11250. e Symmetric first primibrachial, M11251, e1 proximal, e2 distal, cryptosynarthrial facet. f Distal view of asymmetric first primibrachial with cryptosynarthrial facet, M11252. g Radial with high scalloped muscle fossae, M11253, g1 adoral-proximal, g2 aboral-distal. h Aboral view of small radial with crest and knobs, muscle fossae low; M11254. i Distal (upper) view of basal circlet, note nerve canals, M11255. j Lateral view of high basal circlet, M11343. k Basal circlet of medium height, M11256, paratype, k1 proximal (lower) facet with first columnal, k2 oblique lateral-distal view with epizoic Nubeculina infraoolithica (Terquem). l Interior view of basal pair, M11257