Extended Data Fig. 1: 3D-reconstructed contents from synchrotron-scanned scroll coprolites attributed to Ptychoceratodus (a-f) and probable regurgitalites attributed to Polonosuchus (g-t) from Krasiejów.
From: Digestive contents and food webs record the advent of dinosaur supremacy
ai, Specimen ZPAL AbIII_3401 in semi-transparency with internal fish remains (aii-av) and crushed bivalves (avi-avii). The dotted line marks a big spiral convolution. aii, Virtual thick slab of the coprolite matrix and articulated fish scales. aiii, Close up of semi-articulated fish scales (the bony part of the scale is highlighted in orange and the ganoine layer in pink) and fin lepidotrichia (green). aiv, Pelvic girdles and articulated right pelvic fin. av, Example of a fish scale. Note the lateral line canal opening (centre). avi, avii, Crushed bivalve shells. bi, Specimen ZPAL AbIII/3413 in semi-transparency with internal crushed bivalves. bii, Ostracod valve in lateral views. biii, External and internal view of a crushed bivalve shell. biv, External view of a crushed bivalve shell. ci, Specimen ZPAL AbIII/3412 in semi-transparency with internal unidentified globules. cii, Virtual thin section showing the coprolite matrix and one of the globules. di, Specimen ZPAL AbIII/3416 in semi-transparency with inclusions. dii, Round inclusion (here preserved as a hemisphere) with internal spiral structure. diii, A mid-line fish scale. div, Beetle elytron. dv, Two bivalve shells in articulation. e, Specimen ZPAL AbIII/3415 in semi-transparency with internal fish remains and mineralized cracks. fi, Specimen ZPAL AbIII/3414 in semi-transparency with internal cracks and inclusions. fii, Plant inclusion. fiii, fiv, Small bone inclusions. g, Two fragments (gi specimen ZPAL AbIII/3417a, gii Specimen ZPAL AbIII/3417b) rendered in semi-transparent. h-i, Plant cuticles. j, Tooth-bearing fragment from a temnospondyl skull. Note the folded dentine (‘labyrinthodont’ plicidentine) which is the characteristic tooth structure of early tetrapods including temnospondyls. k, A smaller fragment of a tooth-bearing fragment of a temnospondyl skull (from specimen gii, but perhaps representing a fragment of the same bone as in gi). l, Detailed view on folded dentine in one of the teeth. m, A vertebra, likely of a tetrapod. n, Triangular bone with large canals (perhaps from a temnospondyl). o, Small, poorly preserved vertebra. p, Elongated bone with large canals (likely from a temnospondyl). q, Small fish bone. r, Ganoid scale of an actinopterygian fish. s, Virtual thin section displaying the bromalite matrix and several bones (including the small temnospondyl skull bone shown in k). t, Virtual thin section displaying the bromalite matrix and the large temnospondyl skull bone in j.
