Fig. 4 in Calcium phosphate preservation of faecal bacterial negative moulds in hyaena coprolites

Fig. 4. SEM images of coprolites of the hyaenid Lycyaena chaeretis (Gaudry, 1861) from La Roma 2 (Upper Miocene, Spain). A. Calcite crystals inside a void likely produced by gas arising from digestive processes (RO-SSC). B. Matrix composed of microspherulites 1–3 μm in diameter (RO-SSC). C. Polished sections examined in backscattered detection mode, showing the thin-walled structure of the microspherulites (white arrows) (RO-2008-117). D. Microspherulites embedded in a fine-grained calcium phosphate precipitate; the brighter zones indicate areas enriched in Na and Cl (white arrows) (RO-2008-117).