Figure 19 in Environmental control versus phylogenic fingerprint in ontogeny: The example of the development of the stalk in the genus Guillecrinus (stalked crinoids, Echinodermata)

Figure 19. Variations in the level of organization of the columnals during their ontogeny in relation to their position on the stalk at the juvenile stage in Guillecrinus neocaledonicus. Ontogenetic stages of Figure 16 (J1 and J2, juvenile stage; A1 and A2, adult stage). Position on the stalk at the juvenile stage (P, proxistele; M, mesistele; D, dististele). See text for explanations.