The highest similarity of #Polonolimulus to Early Triassic Australian forms - suggests rapid (or earlier) diversification and, together with its discovery within marine-influenced deposits, challenges the idea these extreme forms were fully freshwater-adapted. #Fossils #Triassic #Xiphosurida
This crocodile ran like a greyhound across prehistoric Britain 200 million years ago #fossils #paleontology #reptiles #Triassic #UK
Idealized reconstruction of Polonolimulus zaleziankensis gen. et sp. nov. Reconstruction credit: Jonatan Audycki. https://doi.org/10.7717/peerj.20950/fig-11
Palaeobiogeography of Triassic horseshoe crabs. Palaeogeography of the world is reconstructed at 245 Ma (Anisian, Middle Triassic) and displayed using Mollweide projection, with a close-up of the Central European Basin System. The extents of shallow seas (light blue), landmasses (pale yellow) and mountain ranges (orange) are reconstructed based on Cao et al. (2017). Symbols represent Triassic localities that have yielded horseshoe crab fossils, their ages, and taxonomic assignment. The palaecoordinates of the xiphosurid localities are also reconstructed at 245 Ma for consistency. Simplified reconstructions of austrolimulids are displayed for context and comparison: 1–Polonolimulus zaleziankensis from the Lower Triassic (uppermost Induan/lowermost Olenekian) Zalezianka-Gózd locality, Poland; 2–Psammolimulus gottingensis from the Lower Triassic (Olenekian) Solling Formation, Germany; 3–Batracholimulus fuchsbergensis from the Upper Triassic (Norian/Rhaetian boundary) Exter Formation, Germany; 4–Attenborolimulus superspinosus from the Lower Triassic (upper Olenekian) Petropavlovka Formation, Russia; 5–Vaderlimulus tricki from the Lower Triassic (lower Spathian, Olenekian) Thaynes Group, USA; 6–Austrolimulus fletcheri from the Middle Triassic (lower Anisian) Beacon Hill Quarry, Hawkesbury Sandstone, Australia; 7–Dubbolimulus peetae from the Middle Triassic (lower Anisian) Ballimore Formation, Australia; 8–Tasmaniolimulus patersoni from the Lower Triassic (lower Induan) Jackey Shale, Tasmania (Australia). Since the investigated xiphosurid localities differ stratigraphically, their geographical position relative to continental boundaries and shallow seashores are approximated. The display window on the map showing close-up boundaries is not square due to employed map projection. For the full list of investigated localities along with their current and reconstructed palaeocoordinates and temporal data. https://doi.org/10.7717/peerj.20950/fig-10
PCA plot of the Triassic horseshoe crabs using prosomal data only. TPS grids show deformation between the average and the minimum and maximum landmark coordinates for PC1 and PC2. Convex hulls for Austrolimulidae (red) and Limulidae (light blue) are plotted in two alternative ways: solid lines for the inclusion of Limulitella is in Limulidae, and dashed lines if Limulitella is included within Austrolimulidae. Outlines of the specimens used in the analysis are shown above the plot: 1–AM F38274 Austrolimulus fletcheri, 2–gz4142 (latex peel of the holotype Muz. PGI 1808.II.10) Polonolimulus zaleziankensis, 3–UCM 140.25 Vaderlimulus tricki, 4–MMF 27693 Dubbolimulus peetae, 5–GZG.INV.45730a Psammolimulus gottingensis, 6–PIN 5640/220 Attenborolimulus superspinosus, 7–UNISTRA.2015.0.50968 Limulitella bronni, 8–LIM 68 L. bronni, 9–ZPAL V.46/101 Limulitella tejraensis, 10–PMSL T-993 Sloveniolimulus rudkini, 11–MGSB M 262 Tarracolimulus rieki, 12–MGSB 19195 Heterolimulus gadeai.: 13–MAN 8240 Keuperlimulus vicensis, 14–ZPAL V.46/120 Limulitella tejraensis, 15–MB.A.0207 Limulidae indet. (‘Limulus kieri’), 16–ZPAL V.46/106 L. tejraensis, 17–SNSB-BSPG 1967 XVI 27 Limulitella cf. liasokeuperinus, 18–ZPAL V.46/103p L. tejraensis , 19–UTGD 123979 Tasmaniolimulus patersoni. Outlines are not to scale. https://doi.org/10.7717/peerj.20950/fig-9
A new #Triassic austrolimulid from #Poland presents insight into xiphosurid evolution and palaeobiogeography at the dawn of the Mesozoic led by @jaudycki.bsky.social and with @grzegorzniedz.bsky.social: peerj.com/articles/209... @peerj.bsky.social #paleobiology #evolution
A Lystrosaurus murrayi standing in front of some Early Triassic plants
Here’s Lystrosaurus murrayi ignoring the Great Dying, the mother of mass extinctions, just getting on with its parrot-pig-reptile-bulldog business
#paleoart #sciart #dicynodont #triassic
Smith & Sidor present a new shuvosaurid, Sonselasuchus cedrus, from the Late #Triassic Chinle Fm. in Arizona 🇺🇸 & a mass assemblage of at least 36 individuals. Seems these crocodile-line ‘dinosaur mimics’ were quite abundant! ⬇️
#Paleontology #Fossils #Science
www.tandfonline.com/doi/full/10....
9-Mar-2026
“Peculiar” ancient ancestor of the #crocodile started life on four legs in adolescence before it began walking on two
Newly discovered Late #Triassic #reptile was among creatures that had physical features mimicking the late-evolving #dinosaurs it lived beside […]
Digital Illustration of a tanystropheus floating over a purple to blue gradient rectangle on an off white background. Tanystropheus is a long-necked triassic reptile, with short, splayed legs and a disproportionately long neck. The drawing is stylized, putting bends in the longer extremities. Its head faces left, its body gathered beneath it to form a reverse C shape. In the bottom right corner is a watermark reading: “LEAVES AND INKS”
Mesozoic March 1 | Tanystropheus
I should've made the neck longer but I'm a amateur, this challenge is a learning experience for me :)
#artwork #Mesozoic #MesozoicMarch #Triassic #Tanystropheus #reptiles #Prehistoric #Paleontology #Paleoart #Illustration #PrehistoricReptile
🚨Paper Alert!🚨 Wojciech Pawlak, Mateusz Tałanda & colleagues show 'High-latitude dipnoan aestivation #burrows suggest seasonal aridity for early #dinosaur ecosystems in the Late #Triassic of East Greenland' in #Palaeo3 🐟https://doi.org/10.1016/j.palaeo.2026.113624
And no, you don't get any context because fuck you. :3
The context is between me and @versusbelmont.bsky.social only. :]
#art #artsky #dinosaur #Triassic #meme #shitpost #gif #dimetrodon #history #geology
Rigged Sharovipteryx
It's really tricky.
#blender #b3d #paleoart #Sharovipteryx #Triassic
Mountain photographer stumbles on one of the largest ever collections of Triassic dinosaur prints.
A newfound site in the Italian Alps holds one of the largest collections of Triassic dinosaur footprints ever seen
www.scientificamerican.com/article/phot... #globalmuseum #dinosaurs #Triassic
Photographs (A–C) and CT-scans (D–G) of morphotype E. (A) The complete specimen with x-y being cross section in picture F. (B–C) Orthoceratoid cephalopod shell fragment seen in two different angles. Red arrows pointing to the same spot in both pictures. (B) Shell fragment seen from the top. (C) Shell fragment seen in cross section. (D–E) Orthoceratoid shell fragment with a length of 15.8 mm and visible chambers. (D) Outside of the shell fragment. (E) Underside of the shell fragment. (F) Orthoslice of onychites marked x-y in picture A. (G) Bone fragment. (A–F) PMO 250.281. (G) PMO 250.904. https://doi.org/10.7717/peerj.20746/fig-7
CT-scans (A, D, G–I) and thin sections (B–C, E–F) of morphotype A. (A1–A2) External and internal view of sub-morphotype A, PMO 250.270. (B) Tetrapod bone in thin section, PMO 250.004. (C) Fish vertebrae, PMO 250.009. (D1–D2) External and internal view of sub-morphotype A2, PMO 150.275. (E) Fish scale, PMO 249.999. (F) Degraded bone fragments, PMO 250.000. (G1–G2) External and internal view of sub-morphotype A3, PMO 250.273. (H) Burrows with a width of approximately 0.5 mm over a total area of three mm, PMO 250.530. (I) Conodont element measuring 1.22 mm in length, PMO 250.273. https://doi.org/10.7717/peerj.20746/fig-3
Photographs of the different morphotypes found in the Grippia bonebed, Svalbard. (A–B) morphotype A1 cigar. (C–E) morphotype A2 amphipolar. (F–G) morphotype A3 cylindrical with grooves. (H–J) morphotype B1 spiral rounded. (K–L) morphotype B2 teardrop. (M–N) morphotype C sub-rounded. (O-P) morphotype D reniform. (Q–S) morphotype E wide cylindrical.(A) PMO 250.847. (B) PMO 250.846. (C) PMO 250.275. (D) PMO 250.854. (E) PMO 250.858. (F) PMO 250.860. (G) PMO 250.530. (H) PMO 250.533. (I’-I”) PMO 250.864. (J) PMO 250.841. (K) PMO 250.869. (L) PMO 250.868. (M) PMO 250.271. (N) PMO 250.884. (O) PMO 250.886. (P) PMO 250.528. (Q) PMO 250.899. (R) PMO 250.897. (S) PMO 250.281. https://doi.org/10.7717/peerj.20746/fig-2
Digesting an ancient ecosystem: #coprolites from the Grippia #bonebed, Lower #Triassic, Svalbard
peerj.com/articles/207...
@peerj.bsky.social #paleobiology #paleontology #fossils
doi.org/10.7717/peer...
Painterly digital illustration of a mammal-like gomphodontian approaching the entrance of its burrow sharing an uneasy stare with a Procompsognathus or other closely related coelophysid theropod dinosaur resting on a fallen log just outside of the burrow with various Triassic plants in the morning light.
Triassic artwork for James Stryker's paleoart project featuring a cynognathian cynodont and a coelophysid dinosaur.
#Triassic #Paleoart #Paleoillustration #Illustration #Dinosaur #Gomphodontia
Silesaurs may have been early ornithischian bird-hipped dinosaurs, a group that would include Triceratops (pictured) when dinosaurs reigned. Image credit: Shutterstock/Alberto Andrei Rosu.
#Paleontologists are on a mission to pinpoint the dawn of the #dinosaurs. What early evolutionary steps set the stage for the animals’ impressive reign? A PNAS News Feature: https://ow.ly/nocW50YbEU7
#Lewisuchus #Triassic #Silesaurus #ornithischians #extinction
#Volcanic #eruptions and #extinction during the #Triassic www.sci.news/paleontology... My reporting on #Darwin voyage and #volcanoes in #Chile here nkozphoto.com/index.php/jo... #science #evolution #Climate #climatechange #osorno
Dinosaur A (On the left side): Lewisuchus Most paleontologists agree that Lewisuchus is part of a wider group of animals called silesaurs. Image credit: Nobumichi Tamura/Stocktrek Images / Science Source. Dinosaur B (On the right side). Saturnalia Saturnalia is among the first confirmed dinosaurs. Image credit: Nobumichi Tamura/Stocktrek Images / Science Source.
#Paleontologists are working to pinpoint the dawn of the #dinosaurs. What were the early evolutionary steps that set the stage for the animals’ impressive reign? A PNAS News Feature: https://ow.ly/PXit50Y66be
#Lewisuchus #Triassic #Silesaurus #ornithischians #extinction
Rigged Vancleavea
I think this is the hardest creature I've ever made.
It's really hard to fix the weight of the jaws and the teeth when the jaws closed.
#blender #b3d #paleoart #Vancleavea #Triassic
Drawing of a long bipedal crocodile-like animal. I used Scott Hartman's skeletal as reference.
Dinosaur A (On the left side): Lewisuchus Image credit: Nobumichi Tamura/Stocktrek Images / Science Source. Dinosaur B (On the right side). Saturnalia Image credit: Nobumichi Tamura/Stocktrek Images / Science Source.
#Paleontologists are working to pinpoint the dawn of the #dinosaurs. What were the early evolutionary steps that set the stage for the animals’ impressive reign? A PNAS News Feature: https://ow.ly/q3wC50Y1LmI
#Lewisuchus #Triassic #Silesaurus #ornithischians #extinction
Finished the texture.
Sharovipteryx, the 20cm Triassic glider. It could glide with its legs to avoid predators and hunt insects.
This may be my favorite species from Triassic.
#blender #b3d #paleoart #Sharovipteryx #Triassic
#Dicynodonts were an ancient & successful group of #synapsids that lived from the middle of the #Permian to the end of the #Triassic. They were among the largest terrestrial animals of their time, only really surpassed when large dinosaurs began to evolve in the Late Triassic.
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This specimen was found on a 1964 expedition that took BYU's James A. Jensen & a Harvard team of paleontologists to the #Ischigualasto Formation of Argentina. This formation has yielded an amazing array of animal & plant fossils from the #Carnian stage of the Late #Triassic (237-227 Ma).
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The lateral view of a skull of the dicynodont, Ishigualastia jenseni, on display at the Brigham Young University Museum of Paleontology in Provo, Utah. This skull was discovered in 1964 from the Ishigualasto Formation, Argentina.
Presenting a skull of the #dicynodont, Ischigualastia, at the BYU Museum of Paleontology in Provo, Utah 🇺🇸 for this #FossilFriday. This ancient, beaked herbivore was the size of a cow & lived in Argentina 🇦🇷 during the Late #Triassic (~230 Ma).
#Paleontology #Science
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A vibrant artwork depicting a dinosaur amidst tall grass, showcasing its detailed features and natural surroundings.
Paleontologists are closing in on the dawn of the dinosaurs—revealing the early evolutionary steps that set the stage for their rise. Read the PNAS News Feature:
https://ow.ly/BxZp50XXke0
#dinosaurs #Paleontology #Triassic #Lewisuchus #Silesaurus #ornithischians #extinction
An artwork showing two dinosaurs next to each other, illustrating the diversity of early theropods and ornithischians. Image credit: Science Source/MARK P. WITTON.
Can #paleontologists pinpoint the dawn of the #dinosaurs? Researchers are uncovering the early evolutionary steps that set the stage for their impressive reign. A PNAS News Feature: https://ow.ly/Ntt050XTtUk
#Lewisuchus #Triassic #Silesaurus #ornithischians #extinction
