Sea spiders (Pycnogonida) shared unsual body plan that their bodies are almost just legs, even their guts were branched and associated within each of them. They are not spiders nor even arachnids, instead they most likely arose from a very basal chelicerate lineage.

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fancy feathers (and pycnofibers)

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We've just reached our Pycnonemosaurus stretch goal! Thank you so much to everyone who has supported the project thus far. Check out the newly revealed stretch goal!

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One specimen of Gladocephaloideus is so complete and well-preserved that it even includes traces of hair-like pycnofibers. https://t.co/YqOBxq3WB0

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Pterosaur feathers
by

Pterosaurs are known to have been covered in hair-like pycnofibers. Two specimens of anurognathids show that some pycnofibers were brush- or tuft-shaped and probably share an evolutionary origin with feathers.

https://t.co/t8rAmwEbQq

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Sordes was a small flying reptile from the Jurassic. It had wing membranes attached to the legs and between the legs and pycnofibres (hair-like filaments) covered its body.

(Credit: Dmitry Bogdanov, paleopeter)

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Results from the last of the year 2018! Rhabdodon, Paleorhinus, Prodrinoceras, Rostropycnodus.

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Pterosaur pycnofibres suggest feathers are not limited to maniraptoran dinosaurs: Yang et al in

https://t.co/O2kfL8DcW7

Free-to-read: https://t.co/9HyVBpvjjr

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Results from a very quick... failed stream. I hope I can fix this until the release of the book. Don't know what happened... anyway. We have here Pycnonemosaurus, Desmatosuchus and Ikrandraco.

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Light-vented Bulbul (Pycnonotus sinensis)

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Another This time Eomesodon, a beast that was able to grow surprisingly huge for a pycnodont. I saw a original in Solnhofen, especially impressive because one is able to the the sculpture of the scales which are usually too small to notice.

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And another pycnodont! This genus, Stenoprotome, is mostly known for dorsally preserved parts of the head, but in combination with the few lateral preserved parts, and material from related genera, they let us paint an absurd picture.

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Let's continue. Gladiopycnodus is probably the best when you search for some alien spaceship inspiration, the armored belly and back, long rostrum and of course the huge anal spines can't be ignored.

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Very few work on fish regularly, but even clades you would think are pretty normal can have amazing members, and in the case of pycnodonts we actually have several families of super weird fish. Rostropycnodus is just one of the medium weird guys.

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