| Summary: | Fig. 5. Structural features of the caryophylliid coral Ceratotrochus (Edwardsotrochus) duodecimcostatus (Goldfuss, 1826) coralla from upper Pliocene deposits in a tributary valley of the El Melah stream, north-east of Hammamet town, Tunisia. A. Virtual sections of INGUJ265P153 in lower (A1) and in more distal part (A2) of corallum. B. Thin-section 3/76 of INGUJ265P139 that shows nearly completely developed 5 cycles of septa. Positions of 10 S1 septa marked with black dots. C. Thin section 2/118 of INGUJ265P138, enlarged region of transversely sectioned corallum to show diverse pat- terns of mid-septal zone development (from zig-zag in S1, S2 septa to straight in S4 septa). D. Thin sections of INGUJ265P137, transverse (D1, thin section T1/8) and longitudinal (D2, thin section T1/9) sections to show some variability of septal cycle development (D1), and development of tabular dissepiments (D2). E. INGUJ265P188, distal (E1) and lateral (E2) views of specimen with major structural features indicated. F. Longitudinal thin section 5/29 of INGUJ265P136 with the boring Maeandropolydora sulcans Voigt, 1965. G. Virtual longitudinal section of INGUJ265P188 with the boring Maeandropolydora elegans Bromley and D'Alessandro, 1983. Published as part of Gaaloul, Nadia, Uchman, Alfred, Ali, Syrine Ben, Janiszewska, Katarzyna, Stolarski, Jarosław, Kołodziej, Bogusław & Riahi, Sami, 2023, In vivo and post-mortem bioerosion traces in solitary corals from the upper Pliocene deposits of Tunisia, pp. 659-681 in Acta Palaeontologica Polonica 68 (4) on page 665, DOI:10.4202/app.01095.2023, http://zenodo.org/record/12198539
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