This turkish eurypterid, despite its relatively generic look, is of great importance in the understanding of how these animals evolved before their Silurian golden age, both when looking at species relationships, paleobiogeography & science’s history. Size : a bit more than 10cm of body length Time period : Late Ordovician Paleoart speculativometer : Mostly based on another taxon The animal drawn looks a bit like a scorpion but without claws, short spiny legs at the front, a last pair of legs enlarged and used as fins, and a long sword-like telson in place on the sting

What time is it? It’s #Cheliceratime & #Fossilfriday!
Today, one of my favourite eurypterids for all it represents, Paraeurypterus anatoliensis!
All the basic infos are here but if you want to learn more, there’s more below!⬇️🧵

#eurypterid #ordovician #turkey #paleoart #sciart #bugsky #invert
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A friend found this pair of trilobites and I find them fascinating.
Two articulated specimens preserved together, showing very clear thoracic segmentation and a well-defined pygidium.

#Paleontology #Trilobite #Ordovician #Fossil #Geology #Travel

The whole morphology of this basal sea spider is currently unknown, only a fossilized molt of its central body made it to us. The head part is really weird (even from pycnogonid standards), hinting to how little we know on early sea spider evolution. Size : Unknwon, I hypothesised it in the drawing to be of somewhat 5-ish cm of leg span Time period : Late Ordovician Paleoart speculativometer : Pure speculation The animal drawn looks like a spidery figure with 8 long legs but with a long tail beind it and a weird 5 segmented head with large claws at its front

What time is it? It’s #Cheliceratime !
For this entry it's the first "pure speculation" paleoart of the series with Palaeomarachne granulata!

All the basic infos are here but if you want to learn more, there’s more below!⬇️

#arthropod #ordovician #pycnogonid #paleoart #sciart #bugsky #invert
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Really excited to have found these Ordoviciam trilobites in the Anti-Atlas, Morocco.
One is extremely tiny, but both specimens preserve clear eye detail, which always makes a find special. The small one may be a juvenile calymenid-type trilobite.

#trilobite #fossils #Ordovician

Ordovician? More like Odd-ovician!
I mean, check out these crazy critters 🤯

Wanna learn more? Head to bit.ly/ordovician-diorama & tune in next week for another #FossilFriday feature from the Paleo Research Institute collection
www.digitalatlasofancientlife.org/vc/

#Fossil #Paleontology #Ordovician

Maqueta de coral con forma de tubos, con la parte estrecha en el sustrato, y apéndices saliendo por el extremo superior.

Entre el Ordovícico medio y el Pérmico tardío (486-251 MdA), en el océano podían verse corales rugosos que podían crecer hasta un metro de longitud en forma de cuerno y se alimentaban del plancton. 🏛️Museo Carnegie de Historia Natural 📷James St. John #ordovícico #ordovician

This ordovician fella is one of the oldest confirmed xiphosuran, the group containing modern horseshoe crabs. Its already modern-shaped body suggests that the horseshoe crab lineage origins go deep in the Ordovician or even before, like it’s believed for many chelicerates. Size : around 25cm of body length Time period : Late Silurian Paleoart speculativometer : Some missing parts The animal drawn is a brown-yellow horseshoe crab, with a wide lunar-shaped first body part and a long sword-like ending to its body

What time is it? It’s #Cheliceratime!
Been a long time since we talked about a horseshoe crab, so here's one of their oldest member, Lunataspis aurora!

All the basic infos are here but if you want to learn more, there’s more below!⬇️

#horseshoecrab #ordovician #paleoart #sciart #bugsky #invert
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Congrats Greta Ramirez, who successfully defended her PhD thesis, 'The ecology and diversity of Late #Ordovician & Early #Silurian paleocommunities of Québec.' L to R: Hans Larsson (McGill), Katalin Patonai (UdeM), Dr. Ramirez, JP Zonneveld (U Alberta), me.

Underwater painterly illustration of an Ordovician seafloor with various animals including crinoids, coral, trilobites, and nautiloids.

Ordovician illustration for James Stryker's paleoart project.

#Illustration #Paleoart #Paleoillustration #Ordovician

Excited for Greta & Feb 5! She can finally be rid of me. 😂 If you want to join via Zoom, send me a request. The presentation will be in English. #Ordovician #Silurian #FoodWebModels #Quebec #Anticosti #Medusozoan

Aphetoceras has gotten a remodel

#Minecraft #prehistoric #paleoart #palaeotology #Ordovician

Video for ESCONI January 2026 Paleontology Meeting – “Getting Lost Can Lead to Treasure – Edrioasteroids” Jack Kallmeyer President of the Dry Dredgers will present “Getting Lost Can Lead to Treasure – Edrioasteroids – What to Do When You Find Thousands”. The meeting was held on January 17th, 2026 at 7:30 PM. While growing my early collection in the Cincinnatian, one of the most desired fossils that I sought after was the Edrioasteroid. While not really rare (if you count fragmentary finds), nice complete specimens tend to be elusive.

Video for ESCONI January 2026 Paleontology Meeting – “Getting Lost Can Lead to Treasure – Edrioasteroids” #fossils #paleontology #ordovician #cincinnatian #Edrioasteroids

Original post on mastodon.social

14-Jan-2026
Tiny Titans of Recovery - Ancient traces reveal minute fossil life in #SouthAfrica’s Cederberg mountains
UCT-led study uncovers #fossil #ecosystem that helped kick-start life after global catastrophe

^at the end of the #Ordovician, ie 444 million years ago […]

Let's welcome Kettneraspis

#Minecraft #prehistoric #paleoart #palaeotology #Ordovician

ESCONI January 2026 Paleontology Meeting – January 17th, 2026 at 7:30 PM – “Getting Lost Can Lead to Treasure – Edrioasteroids” Jack Kallmeyer President of the Dry Dredgers will present "Getting Lost Can Lead to Treasure - Edrioasteroids - What to Do When You Find Thousands". The meeting will be held on January 17th, 2026 at 7:30 PM. While growing my early collection in the Cincinnatian, one of the most desired fossils that I sought after was the Edrioasteroid. While not really rare (if you count fragmentary finds), nice complete specimens tend to be elusive.

ESCONI January 2026 Paleontology Meeting - January 17th, 2026 at 7:30 PM – “Getting Lost Can Lead to Treasure - Edrioasteroids” #fossils #paleontology #Edrioasteroids #ordovician #cinncinatian

This #FossilFriday, another beautiful #Newfoundland fossil: an orthocerid nautiloid from #Ordovician rocks in western Newfoundland. It's a great teaching specimen, as it shows both the internal chamber walls (septae) and the central air/water canal (siphuncle).

Photos: Chris Brown

Video for ESCONI November 2025 Paleontology Study Group Meeting – “Gonioceras: A Most Unusual Cephalopod” The November 2025 Paleontology Study Group Meeting was held on November 15th, 2025 via Zoom. John Cataloni presented “Gonioceras: A Most Unusual Cephalopod”. The diversity of nautiloid shell shapes in the Upper Ordovician of central Laurentia is remarkable. However, one shape is often missing from lists of shell shapes and that is the so-called “flat-fish” form of 

Video for ESCONI November 2025 Paleontology Study Group Meeting – “Gonioceras: A Most Unusual Cephalopod” #fossils #paleontology #fossil #illinois #ordovician #cephalopods #cephalopod

➡ 🇬🇧 Comptes Rendus Palevol 24 (23) #openaccessjournal
📰 Published on 04.11.2025

#FossilFriday The class Somasteroidea & its significance among early Asterozoa #Echinodermata ⤵

✒Daniel B. BLAKE & Bertrand LEFEBVRE
🔗https://doi.org/10.5852/cr-palevol2025v24a23

#ordovician
@echinoblog.bsky.social

Let's welcome Ectenaspis

#Minecraft #prehistoric #paleoart #palaeotology #Ordovician

Let's welcome Homalonotus

#Minecraft #prehistoric #paleoart #palaeotology #Ordovician

Fósil de trilobite. Es una criatura ovalada y simétrica. Tiene una porción anterior semicircular, seguida de una columna con segmentos cilíndricos que reducen su tamaño en la zona posterior. A los lados, hasta el final, tiene segmentos curvos que recuerdan a costillas.

En 1698 se descubrió el primer trilobite, el Ogygiocarella debuchii, pero entonces se creyó que se trataba de un pez plano. 📷Micktherocktapper #trilobite #ordovicico #ordovician

ESCONI November 2025 Paleontology Study Group Meeting – November 15th, 2025 at 7:30 PM via Zoom – “Gonioceras: A Most Unusual Cephalopod” The November 2025 Paleontology Study Group Meeting will be held on November 15th, 2025 at 7:30 PM via Zoom. John Cataloni will be presenting “Gonioceras: A Most Unusual Cephalopod”. The diversity of nautiloid shell shapes in the Upper Ordovician of central Laurentia is remarkable. However, one shape is often missing from lists of shell shapes and that is the so-called “flat-fish” form of…

ESCONI November 2025 Paleontology Study Group Meeting – November 15th, 2025 at 7:30 PM via Zoom – “Gonioceras: A Most Unusual Cephalopod” #fossils #paleontology #ordovician #cephalopods

Beats and yelling shorts, 20th October 25 Isen: Zaklinani posledni zimyOut 5th September on Northern Silence Productions Basic, repetitive black metal achieves a sense of triumphalism through a gradualist development of riffs. Each one is …

Beats and yelling shorts, 20th October 25

hatemeditations.com/2025/10/20/b...

#isen #northernsilenceproductions #echoesofgloom #atmf #dunesofash #signalrex #kingdom #osmoseproductions #blackchambermusic #umulamahri #ordovician

Pez similar a una lamprea pero con numerosos, enormes y afilados colmillos curvos saliendo de su boca.

El Panderodus unicostatus fue un pez sin mandíbula, como las lampreas, que vivió desde el Ordovícico medio al Devónico tardío (470-359 Mda). Sus elementos, unas piezas mineralizadas similares a dientes, habrían permitido agarrarse a su presa. Dado que los […]

[Original post on mastodon.social]

Complete MDICE Signal Found in Ordovician Organic Carbon Isotopes

A complete MDICE signal has been found in the Ordovician organic carbon isotope (δ13Corg) record, dating over 400 million years, confirming a carbon‑cycle shift seen only in carbonate data. getnews.me/complete-mdice-signal-fo... #ordovician #mdice

I think they copied it from my thin section.

#Ordovician

Original post on mastodon.social

Ordovician (Geological periods 🌍)

The Ordovician is a geologic period and system, the second of six periods of the Paleozoic Era, and the second of twelve periods of the Phanerozoic Eon. The Ordovician spans 41.6 million years from the end of the Cambrian Period 486.85 Ma to the start of the […]

#horrorcore #weirdcore #aiimages #iconoplasm #AIArt #AIArtist #AIArtwork #GenArt #DigitalArt #AIArtGallery #AIGeneratedArt #AIArtCommunity #monster #horrorart #digitalart #fantasyai #synthart #lovecraft #friday #nodule #ordovician #fractal #bryophyte #cyclops

Friday Night Nodules of the Ordovician

A geological map of southern Quebec from Pagé et al, 2008. It shows the location of ophiolites (tectonically emplaced ocean lithosphere) along the margin of the Appalachians.

Quite a bit of #Chrysotile was extracted from the Jeffrey Mine, Quebec. It is located on a line of oceanic lithosphere attached to North America during the growth of the Appalachians.

The town of Asbestos, home of the mine, has been renamed 'Val-des-Sources' […]

[Original post on fosstodon.org]

The Lake District We cannot know exactly what this area would have been like when it was full of active volcanoes, but we can get a rough idea from modern subduction regions on Earth today. Under the Mediterranean, …

The latest from JHM is about the Lake District and its formation over the last half billion years, with some additional ponderings about human life.

#LakeDistrict #Formation #Ordovician #Keswick #Ambleside #Skiddaw

jhm.scilla.org.uk/2025/08/18/t...