FIGURE 5 in X-ray Microanalysis and the Chemical Elemental Composition of Gorgonian and Pennatulacean Axial Structures (Anthozoa, Octocorallia)

FIGURE 5. Scanning electron microscope (SEM) micrographs of a cross-sectional view of a gorgonian Ellisella sp. axial skeleton. (A) Secondary electron (SE) image. The axis of Ellisella sp. is featured by the concentric growth rings resembling that in trees, also by the slightly radiating patterns on the surface. These characters are useful for comparative morphology studies on calcaxonian gorgonians and sea pens. Scale bar = 200 μm. (B) Back-scattered electron (BSE) image. The compositional change is minute since again no detectable contrast is observed in the image though the topographical contrast is apparent like that in the SE image. Scale bar = 200 μm.