Fig. 2 in The ultrastructure and building of graptolite dissepiments

Fig. 2. Morphology and variability of dissepiments of dendroid graptolites, SEM micrographs. A, B. "Dictyonema" sp. 1. Caradoc limestone, borehole Chudovo, depth 33 m, Estonia. A. Broken bifurcated dissepiment showing central core. ZPAL G.39/5. B. Dissepiment with broad, plate−like base. ZPAL G.39/2. C. Dictyonema cf. cervicorne Holm, 1890. ZPAL G.39/6. Ordovician boulder O.331. C1, dissepiments with distinct protuberances; C2, abnormally developed dissepiments and abandoned attempts at their formation.