Fig. 15. A. Pachythecalis major Cuif, 1975, ZPAL H.23 in Three-dimensional micro- and nanostructural characteristics of the scleractinian coral skeleton: A biocalcification proxy

Fig. 15. A. Pachythecalis major Cuif, 1975, ZPAL H.23/10. Triassic, Lower Norian. Alakir Çay,Turkey. Transverse polished corallite in TLM (A1); enlargement of dRAF (A2). A3. Transverse polished pachytheca in TLM; fibers show faint regular (ca. 7 µm) alternations of lighter and darker zones. B. Zardinophyllum zardini Montanaro−Gallitelli, 1975. Triassic (Middle Carnian), San Cassiano Beds, Alpe di Specie, Dolomiti (Italy). Completely smooth RAF of septum in distal view, IPUM11 (B1, SEM). B2. Transverse, polished and etched septum (ZPALH.23/11); note fissure in dRAF region (arrow), more or less regular discontinuities in arrangement of pachytheca fibers (arrows), and secondary, probably biogenic deposits filling up the calice (marked transparent dark grey). All coralla with still preserved aragonitic mineralogy.