Fig. 13.Stylophyllumparadoxum Frech, 1890, NHMW 1982 in Three-dimensional micro- and nanostructural characteristics of the scleractinian coral skeleton: A biocalcification proxy

Fig. 13.Stylophyllumparadoxum Frech, 1890, NHMW 1982/57/100, corallum with aragonitic mineralogy still preserved. Triassic, Rhaetian, Fischerwiese, Northern Calcareous Alps, Austria. A, B. Transverse section of septa with concentric arrangement of fibers within septal spines (B, enlargement). C–F. Longitudinal sections crossing centers of septal spines; domed, successive layers of aragonite fibers (darker) separated by lighter "voids" infilled by spar (see D, F enlargements). Except for regular voids in spine centers, there is no difference in organization of superimposed layers of fibers within septal spine. All TLM micrographs.