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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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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

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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#bskyart #surrealism #iconoplasm #AIArt #AIArtist #AIArtwork #AIimages #GenArt #DigitalArt #AIArtGallery #AIGeneratedArt #creativeai #AIArtCommunity #synthart #eyes #pycnogonid #cathedrals #curves

They Sing in Their Protein Cathedrals

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Gulf of Mexico: The Sea Spider Stroke
Gulf of Mexico: The Sea Spider Stroke YouTube video by Global Foundation For Ocean Exploration

A timely encore of this SWIMMING SEA SPIDER for #seaspiderSaturday! #okeanos #pycnogonid youtu.be/7xt-R9UM-j0?...

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This species is one of the several extinct pycnogonids/sea spiders from the Jurassic of Western Europe. It’s also the only fossil one to be assigned to a current genus due to the striking similarities with modern species. The golem part in its name refers to the ancient and mineral nature of the holotype compared to other Eurycyde’s species.

Size : a bit more than 0,5cm of main body length, around 2,5/3cm of legspan
Time period : Late Jurassic
Paleoart speculativometer : Few missing parts

The animal drawn look like a red spider-figure without abdomen, with really long legs

This species is one of the several extinct pycnogonids/sea spiders from the Jurassic of Western Europe. It’s also the only fossil one to be assigned to a current genus due to the striking similarities with modern species. The golem part in its name refers to the ancient and mineral nature of the holotype compared to other Eurycyde’s species. Size : a bit more than 0,5cm of main body length, around 2,5/3cm of legspan Time period : Late Jurassic Paleoart speculativometer : Few missing parts The animal drawn look like a red spider-figure without abdomen, with really long legs

What time is it ? It’s #Cheliceratime!
This time, we’re taking a swim in the jurassic seas of Germany to meet a sea spider named Eurycyde golem!

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

#seaspider #jurassic #solnhofen #pycnogonid #sciart #bugsky #invert

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Original post on mastodon.social

3-Jul-2025
What the sea spider #genome reveals about their bizarre #anatomy
The first high-quality #pycnogonid genome provides novel insights in #chelicerate evo-devo

Intriguing - I didn't even know these #arthropods existed

#science #ecology #evolution #development #MarineBiology […]

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First methane-powered sea spiders found crawling on the ocean floor | CNN Scientists on the US West Coast say they discovered three previously unknown species of deep-sea spider that could have a rare diet fueled by a common greenhouse gas.

MOAR on methane powered Sea spiders! #pycnogonid #seaspidersaturday www.cnn.com/2025/06/17/s...

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"Mutation March 2025, day 23 - sea spider." Marker drawing of a whimsical sea spider, but it is made of wheat. The body and limbs are green, with each leg ending in a spike of wheat.

"Mutation March 2025, day 23 - sea spider." Marker drawing of a whimsical sea spider, but it is made of wheat. The body and limbs are green, with each leg ending in a spike of wheat.

✨ Mutation March, day 23 - sea spider ✨

What a silly, spindly, wheaty fellow!

#MutationMarch2025 #artchallenge #pycnogonid

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It's so hard to get a perfect focus doing #macrophotography without a tripod... I tried Topaz photo AI on some #macro pics and I must say I'm impressed with its sharpening capabilities.

Here is a #seaspider before/after. So happy with the golden eyes!

#bioart #sciart #pycnogonid #closeup

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Video

and
#pycnogonid #seaspider

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sea spider. 8 elongate arms with proboscis, dark brown facing right.. covered with white dots, possibly parasites

sea spider. 8 elongate arms with proboscis, dark brown facing right.. covered with white dots, possibly parasites

A #deepsea sea spider in the family Colossendeis apparently covered by... parasites? St. Rogatien Bank in the North Pacific #seaspidersaturday #pycnogonid

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Pycnogonid! A sea spider on some intertidal algae. #pycnogonid #californiacoast #sonomacounty

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Listening to @hhmijanelia.bsky.social Igor Siwanowicz talk at @ascbiology.bsky.social in December made me want to revisit #Fiji #LUTs for depth coding. Here's a #pycnogonid found in Malibu couple years ago.

#microscopy #bioimaging #fluorescence #confocal

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