I'm just proud of this one
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#art #horseshoecrab #oc

Limu hehehehehe
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#art #horseshoecrab #oc

Limu in monster hunter
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#art #monsterhunter #horseshoecrab

Even more started to beckon #parappatherapper #umjammerlammy #crashbandicoot #spyro #deltarune #antonblast #horseshoecrab #helpmethisiswaytoomanyhashtags

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#paleoart #sciart #Horseshoecrab #polonolimulus #triassic #fossilfriday #Paleontology

Polonolimulus zaleziankensis Horseshoe crab

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Polonolimulus zaleziankensis !

(A fundraising campaign has been launched to help a lesbian couple, please share and donate : www.lepotcommun.fr/cagnotte/sol... )

#paleoart #sciart #Horseshoecrab #polonolimulus #triassic #fossilfriday #Paleontology

Horseshoe crab

#sketchbook #horseshoecrab #fountainpen

Xiphosura (Horseshoe crabs) Group represented: Limulines Cardiac lobe extending forward Ophthalmic ridge The first & second segments of the opisthosoma are functionally linked to the prosoma, making horseshoe crabs the sole chelicerates where using the word “cephalothorax” is 100% correct scientifically. The rest of the opisthosoma is called “thoracetron” More rigid thoracetron with fused segments for all post-Paleozoic species Thoracetron sides often spiny, modern species having articulated spines Sword-shaped telson with wide motion range 5 pairs of book gills. They can be flapped to aid in swimming on the back when needed First opisthosomal legs reduced to non-functional appendages stuck between prosomal walking legs & called “chilaria” Large genital operculum at the end of the cephalothorax Last prosomal legs modified & called “pusher legs”, with a small highly modified exopodite serving as a cleaning structure. 4 first walking legs ending with pincer claws Uniramous prosomal appendages covered by the vaulted prosomal shield 3-segmented chelicerae

Chasmataspidida Group represented: Diploaspidids lineage 5 pairs of uniramous only-walking prosomal legs Unknown chelicerae, supposed to be small & 3-segmented Last segment of 5° legs modified into a small claw or a leg joint Opisthosoma subdidived into typical pattern of a shorter & broader mesosoma of 4 segments, and a longer narrower metasoma (=tail) of 9 segments. The 3 largest segments of the mesosoma are grouped under the term of “buckler”. Reduced pointy/rounded telson Genital appendage tubular and stemming from the 2° operculum, similar to what’s seen in eurypterids Respiratory organs hidden under 3 opercula and of unknown morphology, probably book gills like horseshoe crabs & eurypterids. Possibly 3 supplementary operculas on the first 3 segments of the metasoma. First opisthosomal segment super reduced and squished against the prosoma, overlapping in ventral view on the prosoma in the form of a metastoma between the 5° legs.

Eurypterida ("sea scorpions") Group represented: Derived eurypterines Chelicerae small on average, rarely visible beyond the prosomal rim in most species Large lateral eyes with excellent sight Morphologies of prosoma & uniramous legs are extremely diverse, key features for eurypterid identification & classification Eurypterines specifically have an additional segment to their 5° legs, and the said legs are modified in most eurypterines into large flippers aiding in swimming Opisthosoma subdidived into typical pattern of a broader mesosoma of 6 segments, and a narrower metasoma (=tail) of 6 segments. Sometimes a 7/5 preabdomen/postabdomen denomination is used Telson of various shapes depending on the group considered Complex & segmented tubular +/- long genital appendage called “zipfel” and steming from the fused 1° & 2° operculum. 5 pairs of book gills hidden under opercula called “blattfüsse” First opisthosomal segment squished against the prosoma, only lasting as an overlapping metastoma between the 5° legs in ventral view 1° & 2° opercula fused, ensuring both reproduction & respiration

The arachnid body plan Due to multiple terrestrialization events, arachnids in their traditional sense aren’t monophyletic and therefore, didn’t originate from a single terrestrial ancestor. However, the historic grouping of these animals in a single class relied on a lot of morphological similarities that seem to be convergently shared by default by all terrestrial euchelicerates. The mouth is pushed forward to accommodate the changes in food processing between land & water The first pair of legs is modified as manipulatory & sensory appendages, now called pedipalps Shortened chelicerae, often only 2-segmented 0 to 8 eyes, pattern highly variable Prosoma-opisthosoma connexion is often less rigid and can be morphologically diverse Opisthosoma made of max 12 segments, the ancestral first one being lost Telson reduced, most frequently lost, or turned into a flagellum Spiracles (air-breathing openings) usually on the ventral first half of the opisthosoma, internal respiratory system Genital opening often in the shape of a plate Prosoma’s ventral side often shows fused plates, rigidifying the body for terrestrial walk Loss of the gnathobases & reduction of the masticatory role of the coxae, the legs mainly serve to move Uniramous appendages

Aquatic main euchclicerates groups: Xiphosura (Horseshoe crabs), Chasmataspidida, Eurypterida & the arachnid body plan

#Cheliceratime #horseshoecrab #chasmataspidid #eurypterid #seascorpion #arachnid
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What time is it? It’s #Cheliceratime !
No particular species today, we're doing a bit of a recap before going further: in the end, what is a chelicerate?

Answers in the thread below! ⬇️ 🧵

#arthropod #scicom #arachnid #horseshoecrab #pycnogonid #eurypterid #invert #bugsky

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An Atlantic horseshoe crab I finished up this weekend 🦀

Done in punch needle embroidery

#HorseshoeCrab #Crab #AnimalArt #OceanCritter #SeaCreature #OceanArt #Crustacean #Arthropod #FiberArt #PunchNeedle

They wear matching outfits ooo

#furry #animal #girlfriends #love #cute #fox #horseshoecrab #cartoon #storybook #art #digitalart

Another exciting preprint by @nextstrain, with one of the coolest animals out there, the horseshoe crab! #EvoDevo #HorseshoeCrab #Arthropods

Just some pin sketches. #art #kissymissy #horseshoecrab

There Will Be Blood - ecoRI News The Massachusetts Division of Marine Fisheries is set establish the state’s horseshoe crab quotas for 2026.

#Massachusetts is proposing to reduce 'bait' #horseshoecrab quotas for 2026 from 140,000 to 100,000 crabs but RAISE its 'biomedical' quota from 200,000 to 280,000;
Pharma firms could also capture & bleed 100,000 crabs. Crab allies, complain today to dan.mckiernan@mass.gov. ecori.org/there-will-b...

The limited edition horseshoe crab and radioactive Hagerman Horse fossil prints are now available!

www.beastieandbone.com/gift-shop

#sciart #natureart #fossil #paleoart #illustration #horse #horseshoecrab

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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Romantic horseshoe crab holding a heard shaped ravioli and a poem— roses are red, I think you’re great, are these raviolis, horseshoe crab shaped?

For both my partners, who are the greatest people I could ever hope to know. And a happy pal/gal/valentine’s day to all who celebrate. #valentines #valentinesday #<3 #horseshoecrab #valentinescard

Sanderling iin a horseshoe crab shell on the beach in Cape Cod

Ship ahoy! ⛵A #sanderling in a #horseshoecrab shell for today's #BirdOfTheDay theme of #WaterBirds. On #CapeCod.

Prints have finally arrived for stocking my booth at the Oddities and Curiosities Expo in Charlotte, NC next weekend, including the limited edition Patreon 2025 favorites re-releases! #natureart #sciart #horse #horseshoecrab #fossil #livingfossil

A horseshoe crab with the words "I am just a bit ✨SLOW✨" around it.

My new favorit animel😌 the world is changing too fast for him...

#horseshoecrab #seacreatures

Lawsuit filed to protect horseshoe crabs under Endangered Species Act: ‘Can’t wait any longer’ The American Horseshoe Crab is about as close as you can get to a creature that shared the Earth with dinosaurs, but the Center for Biological Diversity said the marine animals are in trouble.

I remember when these were plentiful and that wasn't THAT long ago...humans can really kill off a species when they are greedy enough. These guys have been around since the dinosaurs...isn't that enough reason to save them?!? #sealife #horseshoecrab #oceans

www.fox13news.com/news/cant-wa...

Horseshoe crab 🤎
| #vgencomm | #horseshoecrab | #arthropods |

If it ain’t broke, don’t fix it…🧲 🦀

Wanna learn more? Head to bit.ly/horseshoe-crab-fossil & tune in next week for another #FossilFriday feature from the Paleo Research Institute collection:

www.digitalatlasofancientlife.org/vc/

#Fossil #Paleontology #HorseshoeCrab #Evolution #Geology #Education

🧪 #HorseshoeCrab 🩸
We should talk more about how to get pharma companies to use alternatives to the blue blood-derived Limulus Amebocyte Lysate (LAL) test for endotoxins.

Scorecard from Centre for Biological Diversity shows most companies not even trying
biologicaldiversity.org/w/news/press...

Nonprofit sues over inaction on horseshoe crab protections | Coastal Review The Center for Biological Diversity filed a lawsuit Monday against the National Marine Fisheries Service for not publishing initial findings on a petition filed February 2024 to protect American horse...

#horseshoecrab

Nonprofit sues over inaction on horseshoe crab protections | Coastal Review share.google/WP0k7slXqLgZ...

An Atlantic horseshoe crab! 🦀 for some reason I hated this color scheme last time. I now think it’s my favorite and will be doing many more like this 😂

#HorseshoeCrab #SeaCritter #PunchNeedle

Mazon Monday #300: Mazon Creek horseshoe crab fossil shows evidence of ancient algal or parasitic infestation This is Mazon Monday post #300.  What’s your favorite Mazon Creek fossil?  Tell us at email:esconi.info@gmail.com. The Lauer Foundation just won't let the Mazon Creek horseshoe crabs alone... first it was Euproops danae remains in bromalites (see Mazon Monday #283), now they've found evidence of ancient algal or parasitic infestation in another Euproops danae fossil from the Mazon Creek biota.

Mazon Monday #300: Mazon Creek horseshoe crab fossil shows evidence of ancient algal or parasitic infestation #fossils #paleontology #MazonMonday #MazonCreek #horseshoecrab #Carboniferous #Pennsylvanian

1/5 Try that speaking 3x fast! #chelicerates #HorseshoeCrab #linocut

a horseshoe crab with some injuries on its carapace, and some limpets hitchhiking on its back

Limulus polyphemus - Atlantic horseshoe crab (2023)

I love these guys, they look so cool but are quite harmless. If you ever see one upside down, help it out and flip it over! They're clumsy and aren't good at doing it themselves!

#invertebrates #xiphosura #horseshoecrab #art #sciart

Showcasing Delawareans' Horseshoe Crab Art - DNREC We requested Delawareans send us their horseshoe crab art, and they did so! Check out a stunning display of paintings, tattoo, Christmas ornaments and more that demonstrate the connection Delawareans ...

So fun to be in highlighted #Delaware #artists this month. The featured paining of mine sold recently to an avid #horseshoecrab fan from Maryland. I’Ve been painting them for about 15 years and help tourist learn about them when they visit our capital. #artist dnrec.delaware.gov/outdoor-dela...