FIGURE 12. Isocrinid and rhizocrinid columnals. A–K in Early Miocene stalked crinoids (Echinodermata) from the southern Rhodanian basin (southeastern France). Paleoenvironments and taxonomy

FIGURE 12. Isocrinid and rhizocrinid columnals. A–K: from Palais des Papes in Avignon; A–C: Metacrinus berthei (MHNL 20.062719), A–B: symplexies with anomalous 4-symmetry, C: distal internodal from a young individual; D–F: Papacrinus avignonensis n. gen., n. sp. (MHNL 20.062726), D: oblique distal view, E–F: oblique proximal view, F: close up of cirrus socket; G–K: Paraconocrinus rhodanicus n. sp. (MHNL 20.062727), G–H: columnal from dististele, G: proximal view, H: close up of fulcral ridge, oblique view, I: columnal from middle mesistele, J: columnal from proximal dististele, proximal view, K: columnal from proximal dististele, side distal view; L: Gastecrinus viticolis n. gen., n. sp. from Vigne Gaste (Istres), aboral cup (MHNL 20.062729). Scale bar equals 1 mm in A–F and L, 0.5 mm in G and I–K, 0.1 mm in H.