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@djbirddanerd.bsky.socialSep 29, 2026, 9:52 AM

Reassessment of #Miocene putative #coprolites from Poland suggests a biogenic origin and probable #squamate (reptilian) producers: peerj.com/articles/217... @peerj.bsky.social supported by size/morphology, surface striations, hair-like inclusions and associated putative reptile remains #paleobiology

Six Miocene coprolite fossils (A–F) shown alongside modern reptile faeces (G–L) for comparison. The fossils are irregular, flattened, dark-brown masses; specimen C has a distinctive striated surface texture. The modern samples come from an iguana, a Madagascar boa, a boa snake, and a tortoise, appearing as similar brownish, segmented or lumpy droppings. Panels M and N are microscope photos of hair-like structures inside specimen A, each marked with a yellow line showing the thin-section cut. Scale bars: 1 cm for the specimens, 100 µm for the microscope views. See: https://doi.org/10.7717/peerj.21755/fig-2A grid of small vertebrate fossils from Bełchatów, Poland (scale bars 1 mm). Highlighted putative reptile finds: A, a possible reptile tooth crown shown from two sides; B, a crocodile tooth, slender and pointed; G, a rounded osteoderm (bony skin plate) in dorsal and ventral view; and N, a putative squamate bone fragment shown in three orientations. The remaining panels show mammal and amphibian remains: bat and hedgehog teeth, a possible frog bone, rodent incisors, and numerous mole and shrew-like insectivore teeth (Desmanella, Plesiosorex, Talpinae, Plesiodimylinae), plus a lagomorph tooth and a desman molar. Scale bars: 1 mm. 10.7717/peerj.21755/fig-3Thin-section and electron microscope images of probable coprolites from Bełchatów, Poland. A and B show entire thin sections of two coprolites — pale, elongate slices with darker internal material. C and D are optical microscope views of the coprolite matrix; E and F are backscattered electron images of the same, showing scattered pale inclusions in a darker groundmass. G, H, and I are SEM close-ups revealing clusters of siderite and iron oxides/hydroxides — granular, bright mineral aggregates labelled "Sd" and "FeO(OH)" — in the coprolite matrix. https://doi.org/10.7717/peerj.21755/fig-5
@koprolitos.bsky.socialSep 9, 2026, 10:05 AM

Entrevista a George Frandsen, fundador de @poozeum.bsky.social, el museo de los #coprolitos, de la mano de @geoilogico.bsky.social:

▶️ koprolitos.blogspot.com/2026/09/entrevista-george-frandsen-fundador-de.html
#dinosaur #coprolites