Plumigorgia hydroides, Nutting, 1910

Chen, Jei-Ying & Williams, Gary C., 2015, X-ray Microanalysis and the Chemical Elemental Composition of Gorgonian and Pennatulacean Axial Structures (Anthozoa, Octocorallia), Proceedings of the California Academy of Sciences 62 (16), pp. 399-415 : 404

Plumigorgia hydroides

Figures 3A–B, 4A–C .

As seen in Figure 4B , there are twelve identified elements, two more than that in Isis hippuris in which the major elements present in the axis of Plumigorgia hydroides are again carbon (21.93 wt%), oxygen (40.07 wt%) and calcium (32.11 %), with one minor element fluorine found at 3.87 wt%. The remaining trace elements are sodium (0.55 wt%), magnesium (0.07 wt%), sulfur (0.15 wt%), chlorine (0.45 wt%), iron (0.04 wt%), bromine (0.09 wt%), strontium (0.53 wt%) and REE ytterbium (0.14 wt%). The summary EDS results for both spectrum 1 (the right side of the axis) and spectrum 2 (the left side of the axis) are listed in Table 2.

TABLE 2. EDS results of spectrum 1 and 2 for gorgonian Plumigorgia hydroides axial cross-section surface from Figure 4A . (All results are in weight%)

Figures

FIGURE 4. Energy dispersive spectrometer (EDS) area scan dataset. (A) EDS site of interest BSE image in a cross-sectional view of a gorgonian Plumigorgia hydroides axial skeleton acquired by INCA Energy software using same region as Figure 3, partial area scan was applied due to the visible topographical differences of the surfaces on both sides of the axis, thus only two small areas were selected for EDS analysis. Scale bar = 300 μm. (B) Bar chart of the quantitative results from (C) spectrum 1 for reference in that the analytical results of the two sites are identical as seen in Table 2.