Fig. 3

Columnals of Rhizocrinidae from Tuilerie de Gan (Late Ypresian). a–c Paraconocrinus romanensis (Roux & Plaziat, 1978), a, b columnal from dististele segment in bed 6 (spm B, MNHN.F.A69331, b close up of the well-preserved fulcral ridge, c articular facet of isolated distal columnal from bed 4 with surface covered by micrite (spm D, MNHN.F.A69333), d–i Democrinus londinensis (Forbes, 1852) from bed 6, d–g isolated proximal columnal of dististele with anchylosed articulation (spm B, MNHN.F.A69337), d, e general view showing the flat anchylosed facet partly broken, f, g previous functional synarthry preserved under the flat anchylosed surface, g close up of the well-preserved stereom of fulcral ridge and adjacent ligament depression, h, i distal-most columnal of the preserved dististele segment, i: well-preserved facet stereom (spm A, MNHN.F.A69336). Scale bars: a, c, d, e, h = 1 mm; b, f, g, i = 100 µm