Figure: Shell of one of the described species Ypomonetikochelys euryaspis („a patient turtle with broad shields”) NHMD 1903049 (Natural History Museum of Denmark, University of Copenhagen; exposition at the Geocenter Møns Klint) in dorsal (top) and ventral (bottom) view.
Two new Triassic turtles from Greenland🐢🙂
1drv.ms/b/c/553c4757...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Map of Denmark with the location of the studied sites and an illustration of an ammonite with explanations of morphological terms
Species concept in palaeontology 🙂
Figure: A. Danish localities which yielded studied ammonites of the Pachydiscus neubergicus group. B. Morphology and measurement of a P. neubergicus specimen.
journals.pan.pl/dlibra/publi...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Figure: Fieldwork in fjords of South Georgia.
Organic carbon burial in fjords of South Georgia 🙂
journals.sagepub.com/doi/10.1177/...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
At the origin of cowries 🐚🙂
doi.org/10.1017/S001...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Antarctic Cretaceous and Paleogene crinoids 🙂
www.sciencedirect.com/science/arti...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Figure: The horned sea star (left) has a skeleton with a “diamond” microstructure. Using various labeling and imaging techniques (middle panel), a model of stereom growth was proposed (right panel).
Morphogenesis of the echinoderm diamond-type stereom 🙂
www.sciencedirect.com/science/arti...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Rycina: Shell of gastropod Desbruyeresia marisindica from Kairei hydrothermal vents in the Indian Ocean, covered with inorganic coatings (A), with cross section through this shell showing morphology of inorganic coatings (B) and close-up on a fragment showing structure and shell/coating spatial relations (C). Distribution of some elements (oxygen, manganese, calcium, iron, copper, and phosphorus) in a fragment of coating illustrated in (C) is shown in lower two rows.
Coatings on shells from hydrothermal vents 🐚🙂
www.nature.com/articles/s41...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Figure: A schematic section through shallow seabed showing the effects of methane-derived carbonate cementation. Cements form at or close to the seabed where worm tubes (A) and bivalve shells (B) occur, or in deeper parts of the subsurface where concrections (C) form.
Methanogenic carbonates 🙂
www.sciencedirect.com/science/arti...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Rycina: Ammonite specimens representing the genera Baculites (a, b, e, f), Fresvillia (c, d), and Hoploscaphites (g) from lower Danian deposits exposed at Stevns Klint, Denmark (see Fig. 3 in Machalski et al. 2025). Prasinophytes belong to the green algae.
Ammonites survived cross the Cretaceous–Paleogene boundary 🙂
www.nature.com/articles/s41...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Figure: Various microstructures of Spirotubus carbonate skeletons under a scanning microscope.
Enigmatic microfossils from southern Poland 🙂
www.scup.com/doi/10.18261...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Figure: Calcispheres (a kind of calcareous microfossils) from Sosnowiec IG-1 core with preserved organic matter. A–B. Volvocacean calcispheres with preserved cells forming a colony; C–D. Radiospherid (spinose) calcispheres with highly mineralized mucous envelopes around single-celled algae. Scale A the same for B and D. The central chamber of the calcisphere is typically between 30 and 50 µm.
Life in a Devonian marine lagoon 🌊🙂
www.sciencedirect.com/science/arti...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Figure: Probable journey of the erratic boulder by rivers from Thuringia (Frankenwald) to the North Sea, and then to England. Palaeogeographic reconstruction for th Pleistocene epoch. Below the pebble itself, with the graptolite visible on the right-hand side.
Silurian erratic boulder travelling from Thuringia to England
www.paleo.pan.pl/files/mate/i...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Figure: Variability in temperature measured in different species of rudist bivalves (upper plot) and well preserved specimen of Vaccinites vesciculosus (lower photo). Coloured violin plots indicate the spread in the full dataset, while black symbols indicate monthly mean values. Grey horizontal lines show the highest and lowest monthly mean value, respectively, through the entire dataset.
Rudists: Extreme climate witnesses ☀️🌊🙂
cp.copernicus.org/articles/21/...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Un’interpretazione dell’IA della Terra primordiale.
La materia organica estratta da campioni di rocce vecchie 2,5 miliardi di anni, contenenti microrganismi fossili come quello nella fotomicrografia, conserva ancora frammenti biomolecolari che potrebbero essere stati prodotti tramite fotosintesi.
I ricercatori trovano prove di vita microbica antica in rocce vecchie 3,51 miliardi di anni
#paleobiologia @scienze
@ambiente
Estrarre informazioni biochimiche da sedimenti antichi ricchi di materia organica, in particolare per determinare il momento […]
[Original post on mastodon.uno]
Crinoids with unusual morphology 😊
journals.ku.edu/treatiseonli...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
A taxonomic revision of the extinct genus Zittelia from Jurassic sediments made it possible to trace a gradual evolutionary change in shell morphology: from the earliest species with an oval shell and elevated spire to later ones with a more globular form, in which the spire scarcely rises above the last whorl. The morphology of the aperture indicates an affinity of Zittelia with representatives of the cowries (superfamily Cypraeoidea), whose earliest members likewise appeared in the Late Jurassic.
The direct ancestor of cowries 🐚😊
geojournals.pgi.gov.pl/asgp/article...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Life restoration of Manouria morla. Author: Rudolf Hima.
Manouria morla, a Miocene tortoise 🐢🙂
sjpp.springeropen.com/counter/pdf/...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Figure: Scleractinian corals originated in the early Palaeozoic (~460 Ma) with solitary, likely heterotrophic forms such as Kilbuchophyllia. Many extant heterotrophic genera (e.g., Caryophyllia, Madrepora) arose in the Mesozoic, whereas photosymbiotic corals appeared in the Triassic (~240 Ma) and have repeatedly suffered environmental crises. Today, photosymbiotic reef builders such as Mussismilia again face extinction. Photo credits: Jarosław Stolarski (three images on the left-hand side); Marcelo V. Kitahara (Caryophyllia, Mussismilia); NOAA National Centers for Coastal Ocean Science (Expedition to the Deep Slope 2007).
Deep-sea corals: The future architects of reefs 🙂
www.nature.com/articles/s41...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Figure: Cold-water, non-symbiotic coral Balanophyllia elegans (left) and the relationship between successive feeding pulses (letter F on the graph) and skeleton formation along with the incorporation of organic matter (OM), visualized by NanoSIMS mapping of the skeleton (bottom right).
Food strengthens coral skeletons and survival in an acid ocean.
sciencedirect.com/science/arti...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Rycina: The authors of the chapter with particularly large Devonian and Carboniferous brachiopods: (a) Bernard Mottequin (Royal Institute of Natural Sciences, Brussels, Belgium) showing two Lower Carboniferous brachiopods, a spiriferide and a productide (b) Adam T. Halamski (Institute of Paleobiology, Warsaw, Poland) showing a Gigantoproductus giganteus (the largest known brachiopod – Lower Carboniferous) in an outcrop in the Pennine Mountains (c) Ulrich Jansen (Senckenberg, Frankfurt am Main, Germany) showing a Stringodiscus giganteus (Middle Devonian).
Brachiopods of the Variscan orogen link.springer.com/chapter/10.1...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Figure: Among numerous Hellenistic-period artifacts recovered from the harbor sediments of Akko (bottom photo), remarkably well-preserved colonies of Cladocora sp. corals were recovered. Today, these corals are typically found in the deeper part of the photic zone (top photo).
Ancient corals reveal the secrets of the port of Acre 😊
www.mdpi.com/2071-1050/17...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Figure: examples of contaminants detected by PiFM on sample surfaces: (a) silica particles used for polishing; (b, c) silicone (PDMS) patches before (b) and after (c) ethanol cleaning; (d, e) carbonate filler material of nitrile gloves after 10s (d) and 20h (e) of contact.
The microscope that reveals every trace 🔬🙂
onlinelibrary.wiley.com/doi/10.1111/...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Figure: A – Cross-section of a woolly mammoth molar from Torske, Western Ukraine. The blue line shows the ablation line inside the enamel layer. B – Seasonal changes in 87Sr/86Sr isotope ratios, shown as a smoothed trend (red line) and detailed fluctuations (grey line). C – Mammoth skeleton, assembled from separate elements, on display at the State Museum of Natural History in Lviv.
Isotopes in mammoth teeth evidence migrations ☺️
pubs.rsc.org/en/content/a...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Figure: The ontogeny of dinosaurs Protoceratops (top) and Bagaceratops (bottom).
Dinosaur skulls allow deciphering changes in diet 🙂
www.scup.com/doi/10.18261...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Figure: relative abundance of cephalopod statoliths (on the left, orange) and fish otoliths (on the right, yellow) in the Jurassic (geological time running from the bottom to the top of the diagram).
At the beginning of the Cretaceous period, fish took over the ocean – the end of cephalopod domination 🐟🙂
www.tandfonline.com/doi/full/10....
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
Figure: habitus of the studied sponges. A–C, I–J, Gastrophanella somaliensis sp. nov., D–H, Microscleroderma magnum sp. nov.
First known free-living lithistid sponge 🙂
www.sciencedirect.com/science/arti...
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Figure: reconstruction of Plesionectes longicollum (artwork: Peter Nickolaus)
A new plesiosaur from Holzmaden 🙂
peerj.com/articles/196...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology #plezjozaur
Figure: insects remains: A – beetle abdomen; B – Orthoptera wing; C – beetle elytron; D – dragonfly wing. Late Jurassic (Tithonian), Kcynia Formation (Unit III). Photo by D. Nast.
New fossils from Owadów-Brzezinki. 🪰🐠🐢
dx.doi.org/10.7306/2025...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
🌍 Czym zajmuje się paleontologia i jaki powinien być udział eksponatów paleontologicznych w Muzeum Historii Naturalnej? O tym w kolejnym odcinku cyklu Świat Okiem Nauki. 🦖 🌿
📅 Premiera: 10 kwietnia 2025 r., godz. 18:00 na kanale YT PAN
Więcej tiny.pl/tbm9pbzh
#MHN #Nauka #Paleobiologia #PAN
Figure: Synthetic and biogenic calcium carbonate polymorphs. Left: Synthetic vaterite (yellow) on calcite (red). Right: Bivalve shell with aragonite (blue) and calcite (red). SEM, false colors.
Practical application of studies on calcification. www.elementsmagazine.org/controls-on-...
#geologia #paleontologia #paleontology #paleobiologia #paleobiology
