Fig. 4
From: Balanocrinus and other crinoids from Late Jurassic mudstones of France and Switzerland
Balanocrinus subteres (Münster in Goldfuss), basal Impressamergel Formation, Middle Oxfordian (Transversarium Zone), Heldenberg near Winzingen (Swabian Alb), from Sieverts-Doreck (1967). a Adoral view of basal, SMNS 69390/1. b Proximal view of radial, note facets to basals, SMNS 69390/2. c Oblique aboral-distal-lateral view of radial, SMNS 69390/3. Radials. d Aboral view of small, thin radial with forked crest, SMNS 69390/4. e Thick radial with smooth surface, SMNS 69390/5, e1 aboral, e2 distal articular facet. f Aboral view of radial with forked crest, SMNS 69390/6. Scale bars 1 mm