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JW
Jo Wolfe
@jopabinia.bsky.social
Why things evolve into crabs. Evolutionary biologist (species alive today AND fossils). Canadian at Harvard (she/her) My science: scholar.google.com/citations?user=CKqoVjEAAAAJ&hl=en
3.4k followers1.8k following7.7k posts
JWjopabinia.bsky.social

For #Crustmas I will give you so many ostracods, with calcified shells enclosing the body. These are myodocopes: "Giant" (3 cm) Gigantocypris with mirror eyes, bioluminescent sexual displays in the Luxorina, eyeless cave dwellers like Spelaeoecia, and SO many fossils (here with pyritized eggs) 🧪🦑

Perfect ROUND ostracod, in orange, viewed from the front where you can see its giant round mirrored eyes, and its antennae that look like whiskers coming out of the gap in the bivalved (yet so round) shell https://twilightzone.whoi.edu/explore-the-otz/creature-features/giant-ostracod/
A long exposure captures ostracods (doing bioluminescent courtship displays) in motion on a Bonaire reef, driven in part by currents. Kyle McBurnie https://www.science.org/content/article/sea-fireflies-caribbean-shining-new-light-evolution
Lateral view of Spelaeoecia, cave ostracod from Bermuda. It is translucent and has no eyes, and most of its appendages peek a bit out of the more elongated bivalved carapace https://oceanexplorer.noaa.gov/explorations/09bermuda/background/plan/media/spelaeoecia.html
Ventral view of Luprisca incuba, 443 million year old fossil. You see it splayed out with appendages, the furca at the bottom, and a few eggs on either side of the furca. All preserved in pyrite. Photo of YPM IP 307300 is from David Siveter, but I can't find the version with scale bar. It's about 1.5 mm long
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JWjopabinia.bsky.social

Read this about the bioluminescence work of @ostratodd.bsky.social@nikohensley.bsky.social and others in their team

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Ccassandroid.substack.com

Any idea what shedded this? Koh Lanta, Thailand

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JW
Jo Wolfe
@jopabinia.bsky.social
Why things evolve into crabs. Evolutionary biologist (species alive today AND fossils). Canadian at Harvard (she/her) My science: scholar.google.com/citations?user=CKqoVjEAAAAJ&hl=en
3.4k followers1.8k following7.7k posts
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