Fig. 5. Flabellum chunii Marenzeller, 1904 in Three-dimensional micro- and nanostructural characteristics of the scleractinian coral skeleton: A biocalcification proxy

Fig. 5. Flabellum chunii Marenzeller, 1904. Recent, Great Meteor Seamount, SEAMOUNT2 (1993), DW 152 (January 11, 1993), 30°02.00'N, 28°22.10'W, 470 m. A. Septa and inner side of wall (A1) thickened by fibers arranged in scale−like units (A2, enlargement); ZPALH.23/2/1. B. Marginothecal wall sectioned longitudinally (large white arrow); layers of successive growth increments (dRAF) continue in wall "stereome", i.e.,TD (small white arrows); ZPAL H.23/2/2. C. Septum longitudinally sectioned in RAF plane. Dissolved or etched components of RAF form narrow "strands" (C2 enlargement); ZPALH.23/2/3. D. Transverse polished and etched section of septum; dRAF zone composed of neighboring dCRA (D1) is from both sides covered with layers of TD fibers (D2) which direction conform to that of scale−like units (i.e., semi−parallel to RAF); ZPALH.23/2/4. All SEM; growth direction within skeletal element i ndicated by black arrow in B.