Tessera

The Palaeontological Association

@thepalass.bsky.social

Official Bluesky of The Palaeontological Association (palass.org). Re-post of jobs and other events doesn't mean endorsement.

353 Posts1525 Follower 387 Folgt

The Palaeontological Association @thepalass.bsky.social · 7h ago

Cambrian SSFs from North Greenland (eastern Laurentia) with regional & global correlations onlinelibrary.wiley.com/doi/10.1002/... #PapersinPalaeontology

Grey scale photographs showing a selection of small shelly fossils from the Cambrian Series 2 of North Greenland. Clockwise from top left: possible arthropod cuticle (NHMD002048183 from GGU sample 255513, scale bar 100 microns); orthothecid hyolith conch (NHMD002048155 from GGU sample 255522, scale bar 100 microns); ecdysozoan Nikolarites spasskyi (NHMD002048184 from GGU sample 255502, scale bar 100 microns); Mellopegma simesi (NHMD002048149 from GGU sample 271470, scale bar 200 microns); calodiscid trilobite pygidium (NHMD002048181 from GGU sample 255507, scale bar 200 microns); Pelagiella (PMU 31480 from GGU sample 255513, scale bar 100 microns). In the centre: sponge spicule (NHMD002048198 from GGU sample 271717, scale bar 100 microns). Red rectangle near upper right is a cover image from the journal Papers in Palaeontology.

The Palaeontological Association @thepalass.bsky.social · 22h ago

Bataspis crux, a galeaspid (jawless stem gnathostome) from the Lochkovian of Yunnan with a batwing-shaped head adapted for hydrodynamic efficiency onlinelibrary.wiley.com/doi/10.1111/... @morphobank.bsky.social

Top left: a photograph of the holotype of Bataspis crux (IVPP V30969) the headshield of a Devonian fish, more complete on the right hand side, showing the extended, curved cornual process. Scale bar in lower right corner is 1 cm.
Bottom right: a life restoration of Bataspis crux rapidly moving away up and to the right from a eurypterid on the left of the scene. Artist: Dinghua Yang.
Blue rectangle at top right is a cover image from the journal Palaeontology.

The Palaeontological Association @thepalass.bsky.social · 22h ago

A giant plagiosaurid temnospondyl from Bjørnøya (Svalbard, Norway) & the origin of the plagiosaurid body plan onlinelibrary.wiley.com/doi/10.1002/... #PapersinPalaeontology @mfnberlin.bsky.social

Map, photographs and line drawings of a fossil tetrapod - the plagiosaur Arctobatrachus urdensis. Top left: map with a red star showing the position of Bjørnøya (Bear Island) in the Arctic region.
Beneath that is a black and white photograph taken at the excavation site in 1948. Skull is lying with snout towards the bottom, two large eyes above. Below to the right is the skull in its present state (PMO 201.958), it shows evidence of weathering as it was not recovered from the fossil site until 1985. Above that to the right is a reconstruction of the skull (scale bar beneath is 5 cm. On the right is a line diagram of the specimen as it was originally discovered, based on field photos taken in 1948 and collected material (scale bar at top right is 10 cm).
Red rectangle in the centre is a cover image from the journal Papers in Palaeontology.

The Palaeontological Association @thepalass.bsky.social · 5d ago

When growth form fossilizes: a new liverwort species from the Cretaceous Las Hoyas site onlinelibrary.wiley.com/doi/10.1111/... @davidhorcajada.bsky.social #FossilFriday

Collage of photographs and diagrams of fossil and living liverworts.
Top left: carbonized compression fossil from the Cretaceous Las Hoyas site (MUPA-LH31437). Darker branched fossil on a paler matrix. Scale bar on left is 1 cm. Overlapping this, in the middle of the image is a coloured branched scheme used to measure the fossils, showing different growth modules as different colours.
Top right: annotated photograph of another fossil liverwort: new species Metzgeriites gynothallicus (MUPA-LH 28894). Below that is a photograph of the extant taxon Metzgeria, showing similar features. Scale bars for both of these images are 250 microns.
Bottom right are two photographs of living liverworts with different growth modes: a dendroid form on the left and a 'thalloid mat' growing on a tree branch on the right.
Blue rectangle in bottom left corner is a cover image from the journal Palaeontology.

The Palaeontological Association @thepalass.bsky.social · 6d ago

A thorny evolution: first Triassic ammonoid with a ventral apertural elongated rostrum onlinelibrary.wiley.com/doi/10.1002/... #PapersinPalaeontology

In the centre is a photograph of a fossil ammonoid (pale coloured in a dark matrix; aperture to top left). Specimen UBGD 301014.1, photograph by Arnaud Brayard, Biogeosciences lab, CNRS, Université Bourgogne Europe. Scale bar in top right corner is 10 mm.
Top right: line reconstruction of the conch, with a life restoration below (in a blue seascape); both by Emmanuel Fara.
Red rectangle at top left is a cover image from the journal Papers in Palaeontology, which features this research.

The Palaeontological Association @thepalass.bsky.social · last wk.

🦴 Newsletter No. 122 is here! 📖 🦈 A 200-million-year-old fish 👩‍🔬 The remarkable "Steamboat ladies" 🦖 The reopening of Dinosaur Isle Museum 🎓 News about our 70th Annual Meeting at the University of Oxford. 🤝 Become a Member and join the PalAss. #newsletters #palaeontology

The Palaeontological Association @thepalass.bsky.social · 2w ago

🌟 Volunteer Opportunity! 🦖📚 Help shape the future of palaeontology! The Palaeontological Association is looking for volunteer reviewers from our Membership to assist with reviewing grant applications. 🔗 Complete the webform below ⬇️ palass.org/awards-grant... #palass #opportunity #posts

The Palaeontological Association @thepalass.bsky.social · 2w ago

The genus Coryphodon in Europe: new exceptional material from Le Quesnoy (northern France, early Eocene, MP7) onlinelibrary.wiley.com/doi/10.1002/... #PapersinPalaeontology @benjaminraynaud.bsky.social @cr2p.bsky.social @nilschabrol.bsky.social @datadryad.bsky.social @morphobank.bsky.social

Palaeogeographic map of Western Europe at the beginning of the Eocene, showing the location of Le Quesnoy, now in Oise, France. Darker shades indicate emergent land, white colour is open marine. Paler grey indicates a shallow marine or lagoonal environment.
On the right, examples of three Corophydon teeth from the site; from top to bottom: upper M3; lower p4; fragment of a premaxilla with an upper I3 (scale bar in the middle is 1 cm).
Red rectangle in upper right corner is a cover image from the journal Papers in Palaeontology.

The Palaeontological Association @thepalass.bsky.social · 2w ago

Anatomical network analysis of sauropodomorph cranial topology onlinelibrary.wiley.com/doi/10.1111/... @datadryad

On the left, four line diagrams of sauropodomorph skulls; from top to bottom: Camarasaurus lentus, Giraffatitan brancai, Lufengosaurus huenei and Tapuiasaurus macedoi. Colours highlight topological modules detected in the cranial networks.
On the right are four plots illustrating methods used in the analaysis. From top to bottom: anatomical network model of the cranium of Shunosaurus lii, showing the 42 nodes and 105 edges; linear regression model of the relation between degree and betweenness in the cranial network of Shunosaurus lii; biplot of the PC1 loadings and jitter plot of the PC1 scores for each node of the cranial network of Shunosaurus lii.
Blue rectangle in the middle at the top is a cover image from the journal Palaeontology.

The Palaeontological Association @thepalass.bsky.social · 2w ago

Multielement apparatus architecture of the Early Triassic conodont Triassospathodus symmetricus: high-resolution x-ray microtomography onlinelibrary.wiley.com/doi/10.1002/... #PapersinPalaeontology

Digital reconstructions from a micro-CT scan of fossil conodont elements forming a natural assemblage. Triassospathodus symmetricus. Top left, rendered image of the whole assemblage in ventral view (GMPKU-P-4309 from bed 617 of the upper Nanlinghu Formation, Chaohu of Anhui, China).
Top right, surface model of the specimen in the same view, with different elements coloured individually.
Scale bar for top two images is 500 microns.
The bottom half of the image shows the 15 individual elements of the assemblage spread out. Scale bar at lower right is also 500 microns.
Red rectangle in bottom right corner is a cover image from the journal Papers in Palaeontology.

The Palaeontological Association @thepalass.bsky.social · 3w ago

Fossil freshwater fishes from the Pliocene of northern Colombia & the palaeogeography of northern South America onlinelibrary.wiley.com/doi/10.1002/... @gaballench.bsky.social @sreinales.bsky.social @agenciafapesp.bsky.social #PapersinPalaeontology #FossilFriday

Top left: Map centred on Colombia, showing Venezuela to the right and the Pacific Ocean to the left. The Guajira Peninsula is highlighted in a dotted box outline towards the top. To the right is a photograph of a fossil fish tooth (Serrasalmus; STRI 470060; scale bar 2 mm). Red rectangle in the top right corner is a cover image from the journal Papers in Palaeontology. Bottom left is a palaeogeographic map of northern South America showing a possible palaeodrainage connection between east and west of the Andes. In the bottom left corner is a selection of fish photographs representing the taxa recovered from the site.

The Palaeontological Association @thepalass.bsky.social · 3w ago

Quo vadis Plesiolacerta? Taxonomy, nomenclature & phylogenetic relationships of the large lacertid Plesiolacerta (Squamata) from the Palaeogene of Europe onlinelibrary.wiley.com/doi/10.1002/... #PapersinPalaeontology @morphobank.bsky.social #FossilFriday @ncn.gov.pl @palaeontosoc.bsky.social

At the top are two photographs of fossil specimens with teeth. Both are the newly named species, Timon planeutes. Upper left is the paratype left maxilla MNHN.F.QU17166 in labial view. Lower right is the holotype right dentary MNHN.F.QU17179 in labial view. Both are from the Phosphorites du Quercy collection, and both have a 5 mm scale bar on the right side of the image.
At the bottom is a simplified time-scaled phylogenetic tree of Lacertidae and Eolacertidae based on fossils.
Red rectangle in the upper right corner is a cover image from the journal Papers in Palaeontology.

The Palaeontological Association @thepalass.bsky.social · 3w ago

Late Miocene Fagus (Fagaceae) foliage, cupules & nuts, from eastern Zhejiang, China onlinelibrary.wiley.com/doi/10.1002/... #PapersinPalaeontology

Photographs of a fossil beech leaf, Fagus stuxbergi from eastern Zhejiang, China.
Left: leaf (Jhuw-19-046) white vertical scale bar at lower left is 1 cm.
Top right: nut (Jhuw-21-045) black scale bar at lower left is 2 mm.
Bottom right: cupule (Jhuw-21-045), black scale bar at lower left is 5 mm.
Red rectangle, centre bottom, is a cover image from the journal Papers in Palaeontology.

The Palaeontological Association @thepalass.bsky.social · 3w ago

Cranial anatomy of the early rhynchosaur Howesia browni: implications for rhynchosaur skull evolution onlinelibrary.wiley.com/doi/10.1002/... @stephanspiekman.bsky.social @morphobank.bsky.social #PapersinPalaeontology

Top left: photograph of a fossil reptile skull: the rhyncosaur Howesia browni SAM-PK-K10180 in right lateral view. Below and to the right is a digitised reconstruction of the same skull, showing the individual bones in different colours. Scale bar between the two images is 20 mm.
Upper right: reduced strict consensus tree of rhynchosaur interrelationships.
Red rectangle in lower left corner is a cover image from the journal Papers in Palaeontology.

Dr Darja Dankina 🐠@darjadankina.bsky.social · 4w ago

⚠️ The 23rd EAVP Conference ended less than one week ago✨ 💚 Thank you as well to all our speakers, sponsors, and everyone who joined us—both in person and online. It was a pleasure to welcome more than 150 participants from nearly 25 countries 🌍🤝 #conference #eavp2026 @eavpalaeo.bsky.social

The Palaeontological Association @thepalass.bsky.social · last mo.

Enigmatic Multiplicisphaeridium-type acritarch from the Pleistocene of Marmara Sea: morphological & spectroscopic evidence for a chytrid-like new taxon onlinelibrary.wiley.com/doi/10.1111/... @datadryad.bsky.social

Top left: map of the Black and Caspian drainage basins and major river systems (coloured lines), with the Black Sea in the centre. The study area (the Marmara Sea) is outlined in red at the south east point of the Black Sea.
Top right: light microscope image of a Palaeoarkaya similis specimen showing a slightly triangular to oval central area with long processes extending. A black arrow near the top of the main body indicates an apical vesicle pore. Holotype, from core MAR02-89P, 490 cm. Scale bar in lower left corner is 20 microns.
Bottom right corner: SEM image of Palaeoarkaya similis. Paratype specimen from core MAR02-89P, 260–262 cm. Scale bar in centre of image is 10 microns.
Bottom left corner: Plot showing some of the results of the chemotaxonomic analysis of Palaeoarkaya similis and other palynomorphs (for comparison); processed ATR μ-FTIR spectra.
Blue rectangle in top right corner is a cover image from the journal Palaeontology.

The Palaeontological Association @thepalass.bsky.social · last mo.

No evidence for Bergmann's rule in Otodus megalodon onlinelibrary.wiley.com/doi/10.1002/... @macrofun.bsky.social @ferronhg.bsky.social

Palaeoartist's reconstruction of Otodus megalodon. In the centre a huge shark breaches the surface of the water, with open mouth, surrounded by flying seabirds and smaller whales in the water. The cliffs of land can be seen in the background to the left. Artwork by Hugo Salais (https://metazoa.studio) reproduced here with kind permission.

The Palaeontological Association @thepalass.bsky.social · last mo.

A new lace bug from Lower Cretaceous Spanish amber & the evolution of forewing venation in Tingidae (Hemiptera) onlinelibrary.wiley.com/doi/10.1002/... #PapersinPalaeontology

Top left: photograph of a fossil lace bug in amber: new species Paleoanomala decapita (the specimen is missing the head; holotype MCNA-9548; scale bar in bottom left corner is 100 microns). To the right of this is a line diagram of the specimen with various anatomical regions shaded in different colours. At the bottom right is an artist's reconstruction of the insect. The small red rectangle in the bottom left corner is a cover image from the journal Papers in Palaeontology.

The Palaeontological Association @thepalass.bsky.social · last mo.

Embryogenesis of the early Cambrian medusozoan (Cnidaria) Octapyrgites elongatus onlinelibrary.wiley.com/doi/10.1111/... @datadryad.bsky.social

Circular schematic diagram illustrating the developmental cycle of early Cambrian medusozoan Octapyrigites elongatus. The cycle begins on the left, in the middle, with a fertilized egg (pink circle) which divides, and continues clockwise (from the top) through three substages of organogenesis (indicated with a red arrow) where the embryo appears as a spherical object (here shown in greyscale) developing increasing numbers of lobes (numbered) before moving into the post-embryonic stages (hatchling), linked with a blue arrow. Each of the three post-embryonic stages includes a blue portion at the bottom (the embryonic tissue) and a pink upper portion (post-embryonic tissue). There is a small horizontal scale bar in the lower right corner, which is 200 microns long. The blue rectangle in the upper right corner is a cover image from the journal Palaeontology.

The Palaeontological Association @thepalass.bsky.social · 2mo ago

Ethmosphenoid endocasts elucidate evolutionary brain divergences & interrelationships of stem tetrapods onlinelibrary.wiley.com/doi/10.1002/... @draliceclement.bsky.social #PapersinPalaeontology #FossilFriday

Digital reconstructions of the skull of Gogonasus andrewsae shown in dorsal view (NMV P221807). Top left: 3D rendering of the whole skull. Middle: showing the cranial endocast within the skull in blue. Bottom right: showing the course of the sensory line canal in pink.
Red rectangle in bottom left corner is a cover image of the journal Papers in Palaeontology.
Scale bar (on right) is 10 mm.

The Palaeontological Association @thepalass.bsky.social · 2mo ago

Happy #FossilFriday! A late-stem-group early hexactinellid from the lower Cambrian of the Siberian Platform onlinelibrary.wiley.com/doi/10.1002/... #PapersinPalaeontology #FossilFriday

Photographs of hexactinellid sponge spicules. Top left, holotype of Botomospongia sphaeroides (PIN 5895/104-1), a flattened skeleton consisting of many spicules; scale bar 0.1 mm. On the right, enlargements of three spicules, from top to bottom: anchoring tip of anchor with one row of secondary rays (after acid etching, scanning electron micrograph; PIN 5895/112); second-order pentactine (after acid etching, back-scattered electron micrograph; PIN 5894/105-1); isolated first-order hexactine (after acid etching, scanning electron micrograph; PIN 5895/112).
Red rectangle at bottom left is a cover image for the journal Papers in Palaeontology.

The Palaeontological Association @thepalass.bsky.social · 2mo ago

🦖📺 Have you discovered the PalAss YouTube channel yet? The PalAss's channel is packed with fascinating talks, lectures, and ECR webinar series! 🌍🦴🔬 🎥 Visit: www.youtube.com/@ThePalaeont... ✨ Keep your finger on the pulse of palaeontology! 🦕💡 #youtube #video #palaeontology

The Palaeontological Association @thepalass.bsky.social · 2mo ago

Beaks of the Permo-Triassic: a morpho-functional analysis at the dawn of a novel structure in tetrapod evolution onlinelibrary.wiley.com/doi/10.1111/...

Four photographs of the skulls of beaked Permian tetrapods (clockwise from top left: Stahleckeria, Diictodon, Proganochelys and Bentonyx). In the middle of the photographs are two sketches indicating the landmark points used to define the beak outlines and collect data from each specimen.
Lower right: a scatter plot showing the first two principal components of the clustering analysis; coloured data points relate to the functional groups illustrated underneath: snippers, shearers and slicers.
Silhouette credits: dicynodonts (Woznikella) DiBgd, CC BY-SA 4.0; trilophosaurs (Trilophosaurus) Jeff Martz, Public Domain; poposauroids (Sillosuchus), redrawn and modified from work by A.R. Mihaila, CC BY-SA 4.0, and PaleoNeolitic, Public Domain; aetosaurs (Stagonolepis) Jeff Martz, CC0 1.0; silesaurids (Kwanasaurus) Jeff Martz, CC BY 4.0. Others by an author of the paper.

The Palaeontological Association @thepalass.bsky.social · 2mo ago

A deep dive into the fossil record of diving beetles (Dytiscidae): origins & pulsed diversification onlinelibrary.wiley.com/doi/10.1111/... @datadryad.bsky.social @jules2701.bsky.social @cocomacro.bsky.social @davidperis.bsky.social @ibb-botanic.bsky.social @paleodb.bsky.social

Main photograph is of a large, round, diving beetle with stems of water plants in the background. This is the extant species Cybister lateralimarginalis.
There are smaller photographs of two fossil diving beetles overlapping this image: top right is Liadytiscus latus (in a brown matrix) and bottom left is Sinoporus lineatus (in a yellow matrix).
Each photograph has a 1 mm scale bar in the lower right corner.
Plot at bottom right shows the origination rate of new genera on the vertical axis and geological time on the horizontal axis.
Blue rectangle at top left is a cover image from the journal Palaeontology.

The Palaeontological Association @thepalass.bsky.social · 2mo ago

Body size evolution through shifting climatic conditions in Mesozoic dinosaurs onlinelibrary.wiley.com/doi/10.1111/... #FossilFriday @lnwilson.bsky.social

Four plots showing estimated change in femoral circumference between ancestor and descendant dinosaurs (vertical axis) as a function of change in mean annual precipitation (horizontal axis). Clockwise from top left: all ornithischians; ornithischians following the Cenomanian/Turonian Boundary; sauropodomorphs following the Jenkyns Event; all sauropodomorphs.
Dinosaur silhouettes from PhyloPic: Scelidosaurus (Gareth Monger, CC BY 3.0); Triceratops (Jagged Fang Designs, CC0 1.0); Plateosaurus (Mike Taylor, CC0 1.0); Diplodocus (Jagged Fang Designs, CC0 1.0).
Dark blue rectangle in top right corner is a cover image from the journal Palaeontology.

The Palaeontological Association @thepalass.bsky.social · 2mo ago

Unusual occurrence of Cochlichnus in aeolian sandstones: evidence for a stiletto fly larval origin onlinelibrary.wiley.com/doi/10.1002/... #PapersinPalaeontology @WileyEcology

Top: photograph of a stiletto fly larva from Australia.
Underneath is an image of a large sand dune overlaid by two pairs of boxes containing a photograph and a plot.
The upper photograph shows the trace made by a modern stiletto fly larva, and a red wavy line indicating the wave function that the trace makes.
Underneath is a similar looking trace fossil from Brazil, with the corresponding wave function in blue.

The Palaeontological Association @thepalass.bsky.social · 2mo ago

A new large paracrocodylomorph archosaurian from the Triassic Chañares Formation (Argentina) & revision of key loricatan features onlinelibrary.wiley.com/doi/10.1002/... #PapersinPalaeontology

Artist's reconstruction of the Triassic paracrocodylomorph Shakajlura riojanensis, from the Chanares Formation, Argentina, by Lautaro R. Blanco.
Red rectangle in bottom right corner is a cover image from the journal Papers in Palaeontology.

The Palaeontological Association @thepalass.bsky.social · 2mo ago

Digestion corrosion marks on a hatchling Allosaurus maxilla from the Upper Jurassic of Guimarota (Portugal) onlinelibrary.wiley.com/doi/10.1002/... #PapersinPalaeontology @wileyecology.bsky.social

Top left: map of the Iberian peninsula with the study area, in Portugal, outlined in red.
Main photograph: a tiny Allosaurus maxilla (scale bar underneath is 1 mm) in lateral view (MG 27804); teeth at the bottom.
Red rectangle at top right is a cover image from the journal Papers in Palaeontology.

The Palaeontological Association @thepalass.bsky.social · 2mo ago

Micro-CT reveals host-controlled symbiosis of the Jurassic serpulid–hydroid association doi.org/10.1111/pala... @WileyEcology

External and internal digital images of the hydroid colonies Protulophila gestroi within host serpulids (Propomatoceros lumbricalis) from the Middle Jurassic of the Polish Basin. Top left: external view of a serpulid (in grey) with pores for the hydroid zooids; to the right (in green) is a view of the internal cavities left by the hydroid (specimen GIUS 8-3730/1; scale bar at left 5 mm).
Below, a different serpulid showing a different morphological expression of the hydroid, this time with a magnification of part of the internal hydroid colony on the right, indicating the zooids, external apertures and stolon (specimen GIUS 83730/3; scale bar to right of external view is 2 mm; scale bar at the bottom of the magnified view on the right is 0.5 mm).
Blue rectangle in lower left corner is a cover image for the journal Palaeontology.

The Palaeontological Association @thepalass.bsky.social · 2mo ago

Triassic archosauromorph lips onlinelibrary.wiley.com/doi/10.1111/...

A selection of Triassic archosauromorphs, reconstructed with lips closing the mouth and covering all teeth.
Top right: Prestosuchus in right lateral view (with closed mouth) and frontal view with an open mouth (scale bar 300 mm).
Three images underneath, from left to right: Venetoraptor (scale bar 10 mm); 'Hyperodapedon' (scale bar 100 mm); Silesaurus (scale bar 20 mm).
Dark blue rectangle in lower left corner is a cover image from the journal Palaeontology.
Artwork copyright Matheus F. Gadelha.