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40 million kinorhynchs/AMT @ceratosaurus.bsky.social · 22/08/2026

which may have led to him seeing features on the specimens which were not actually present. (2/2)

40 million kinorhynchs/AMT @ceratosaurus.bsky.social · 22/08/2026

This is a very nice sketch, but it is important to note that the 'pneumatophores' depicted in the Ruedemann drawing could not be found in the original specimens and were almost certainly not present in graptolites. Ruedemann likely suffered from an eye condition called strabismus, (1/2)

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40 million kinorhynchs/AMT @ceratosaurus.bsky.social · 16/07/2026

i got to use them for a fluid dynamics simulation for my science fair though so all is well

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Dr. Evan J. Gowan @evangowan.bsky.social · 15/07/2026

Any paleontologists out there that has advice on how one identifies the species of a fossil? I am looking at everything from microfossils (foraminifera), molluscs and corals. Is there a manual that teaches how to do this effectively? I am but a mere modeller!

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Luther Wells @ultraluther.bsky.social · 16/07/2026

Red Panda #sciart #mammal #animal #art

A digital painting of a Red Panda resting on a branch

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40 million kinorhynchs/AMT @ceratosaurus.bsky.social · 16/07/2026

you could always draw the really reduced ones with only two or three thecae :P

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40 million kinorhynchs/AMT @ceratosaurus.bsky.social · 16/07/2026

peakkk i really should draw more graptolites (i.e. draw more in general)

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franz @franzanth.bsky.social · 30/06/2026

Be not afraid.

screenshot of a 3D model showing tetragraptus, a graptolite. it's a colony of tubes that form 4 rows that grow outwards and upwards, with their bases meeting in the center like the letter X

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Fabio Alejandro Romero @fabioaleromero.bsky.social · 01/05/2026

This is perhaps my last posts regarding the size estimations of Nanaimoteuthis haggarti, pretty much because there is nothing more to attempt to change their results until somebody come to make a more concrete argument of the results, for now I stick with a conservative size

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Fabio Alejandro Romero @fabioaleromero.bsky.social · 26/04/2026

I went doing this for reflect on the representation of scale Nanaimoteuthis size, I made this chart based on the main results of the article, based on the given data since all the ML are made individually with the constant of an ML:TL average of 4.2 from 18 taxa.

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40 million kinorhynchs/AMT @ceratosaurus.bsky.social · 01/04/2026

this is horrifying and im all here for it

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Kenneth De Baets @djbirddanerd.bsky.social · 25/03/2026

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

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

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40 million kinorhynchs/AMT @ceratosaurus.bsky.social · 14/03/2026

*undisputed articulated sea cucumber fossil (Oesolcucumaria is older, from the middle Ordovician of Wales, but its interpretation is disputed)

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40 million kinorhynchs/AMT @ceratosaurus.bsky.social · 14/03/2026

#paleoart #Paleoart #sciart Reconstruction of Porosothyone picketti, a sea cucumber from the Silurian of Australia and the earliest articulated sea cucumber fossil, that I made for Wikipedia.

A warm gray sea cucumber over a white background. The sea cucumber has a light pink stripe running along the back and another one along the side. The front is light pink and has ten tentacles.

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40 million kinorhynchs/AMT @ceratosaurus.bsky.social · 24/02/2026

im sorry what (from doi.org/10.1016/j.cu...)

Rejecting the radiating neuromeric organization of Mollisonia, Bolton et al. do not recognize that Gaussian blurring can reveal cryptic arrangements: digital defocusing of neural traces in the fossil’s tilted part reveals seriate tiling.

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40 million kinorhynchs/AMT @ceratosaurus.bsky.social · 23/02/2026

Ah yes, a right to play hockey but not a right to food or a livable wage Makes total sense

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40 million kinorhynchs/AMT @ceratosaurus.bsky.social · 23/02/2026

Universities can be extremely expensive as well (at least in 'Murica) so what even is the point of spending all that money to go if you aren't going to actually try to learn

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40 million kinorhynchs/AMT @ceratosaurus.bsky.social · 22/02/2026

fucking horrid beast there is no reason it has to be that large

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40 million kinorhynchs/AMT @ceratosaurus.bsky.social · 22/02/2026

I am extremely excited for the Special Volume to come out! Can't wait to make my own illustration sometime in the future

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Farid Saleh | فريد صالح @taphozoan.bsky.social · 16/02/2026

It's been a while! But I’m back with some massive 🧪 news: 15 papers on the Cabrières Biota have been accepted in Lethaia. They show the incredible complexity of life 470 million years ago (e.g., sponges, algae, worms🪱, arthropods🦐) and will be rolling out soon! 🎨 by @joschuaknuppe.bsky.social

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40 million kinorhynchs/AMT @ceratosaurus.bsky.social · 17/02/2026

Sorry for the late reply but happy birthday!

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40 million kinorhynchs/AMT @ceratosaurus.bsky.social · 09/02/2026

Pterograptus didn't send so I posted it here

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40 million kinorhynchs/AMT @ceratosaurus.bsky.social · 09/02/2026

Congrats for 18K and thank you for hosting! I'm an amateur paleoartist who primarily draws invertebrates. I post rather rarely but I'm working on drawing more. (Pieces in chronological order, Pterograptus is the newest)

The Soom Shale, a late Ordovician lagerstätte

Larva of Platypeltoides magrebiensis, an early Ordovician trilobite

Pterograptus scanicus, a middle Ordovician graptolite

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コワレ宇スキヰ @kowaord.bsky.social · 06/02/2026

期日前投票に行ってきました。

投票箱に投票する三葉虫（アサフス・コワレウスキー）のイラスト。
「I voted!」とコメントが書かれている。

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David Ho @davidho.bsky.social · 05/02/2026

I know it’s intentional but we should stop calling everything AI, lumping useful machine learning techniques for science with large language models that tech companies are trying to cram into everything.

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Literally Miguel 🇻🇪 @literallymiguel.bsky.social · 01/02/2026

The undomitable unpredictability of nature vs "Ventrolateral edge of palatine medial to suborbital fenestra: sharp, palatine does not curve dorsally (0), or smooth, palatine curves dorsally (1)."

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Kiabugboy @kiabugboy.bsky.social · 12/10/2025

The Crinoid hat video is up on my channel! youtu.be/ZdPTYamnqQA

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40 million kinorhynchs/AMT @ceratosaurus.bsky.social · 02/02/2026

However, this shows us in my view how little we actually know about these beautiful animals. I really enjoyed making this piece and am proud of how it turned out (for now at least) Hope you enjoy it!

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40 million kinorhynchs/AMT @ceratosaurus.bsky.social · 02/02/2026

This piece was highly speculative and inspired by the deep-sea habitat this graptolite likely inhabited. I chose to make its zooids bioluminescent and also depicted it eating the unfortunate larva of a Caryocaris phyllocarid, which also lived in the same strata.

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40 million kinorhynchs/AMT @ceratosaurus.bsky.social · 02/02/2026

'Satan's Lyre' #graptolite #paleoart #sciart I've been trying to learn more about graptolites as of late and for my first piece in a while, I chose to draw the large graptolite Pterograptus scanicus.

A large, winglike graptolite Pterograptus scanicus, floats in dark water. The right side is closer to the camera and illuminated by light, while the left side fades into the darkness. There are a regular series of glowing cyan lights along the branch-like 'feathers' of the graptolite. Close to the camera, a gray, transparent larval Caryocaris (a genus of phyllocarid) is ensnared in the graptolite's tentacles.

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40 million kinorhynchs/AMT @ceratosaurus.bsky.social · 20/01/2026

atomized 3D kangaroos... nature is wonderful!

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Richard Fallon @richardfallon.bsky.social · 28/11/2025

An Abstract (?) Expressionist #FossilFriday: Essence of a Graptolite (2014) by Sue Purcell. It 'was inspired by a fossil I found during a field trip with the fossil club at the Lower Llanfawr Quarry, Llandrindod Wells, Powys. Mid-Wales' (www.saatchiart.com/art/Painting...)

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