Tim Ewin (@tim_ewin) profile picture

Tim Ewin

@tim_ewin

Museums, geology, palaeontology, echinoderms,

 London, England, SW7
Joined March 2022
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  • Following145
  • Followers187
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Photo by Tim Ewin (@tim_ewin)Photo by Tim Ewin (@tim_ewin)Photo by Tim Ewin (@tim_ewin)Photo by Tim Ewin (@tim_ewin)Photo by Tim Ewin (@tim_ewin)Photo by Tim Ewin (@tim_ewin)Photo by Tim Ewin (@tim_ewin)Photo by Tim Ewin (@tim_ewin)Photo by Tim Ewin (@tim_ewin)Photo by Tim Ewin (@tim_ewin)
facebook.com/share/p/yUHbR3V… A great news story and even Mary Anning loved fossil crinoids! Given with the author’s compliments no less.
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Happy curator washing a new, spectacular piece of crinoidal limestone from the Early Carboniferous/Mississippian (360million years old) of Derbyshire, UK. This will form part of the new garden displays at the NHM London. Check out these huge crinoid stems!
Image from Tim Ewin (@tim_ewin)
Image from Tim Ewin (@tim_ewin)
Image from Tim Ewin (@tim_ewin)
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OH NICE! the brisingid Astrocles, a new record for the Aleutians Islands! 2804 m #okeanos Lone Knoll
Image from Christopher Mah, @echinoblog.bsky.social (@echinoblog)
Image from Christopher Mah, @echinoblog.bsky.social (@echinoblog)
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Some awesome broody starfish with cute baby starfish!
Christopher Mah, @echinoblog.bsky.social (@echinoblog) profile pictureChristopher Mah, @echinoblog.bsky.social@echinoblog6 Jul 2023
Starfish bearing young (brooding) is a CRAZY thing. Most species live around the Peninsular region. But there's like 5? 6? DIFFERENT lineages/groups that ALL brood in DIFFERENT WAYS. Young around mouth. Internal brooding. Brooding among arm spine baskets!
Image from Christopher Mah, @echinoblog.bsky.social (@echinoblog)
Image from Christopher Mah, @echinoblog.bsky.social (@echinoblog)
Image from Christopher Mah, @echinoblog.bsky.social (@echinoblog)
Image from Christopher Mah, @echinoblog.bsky.social (@echinoblog)
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#fossilfriday More beautiful Wiltshire Middle Jurassic crinoids! Those lovely long stems are being used for an exciting research pilot study into biometrics and ecological tiering! Can you spot the starfish as well?! (Tip: look towards the bottom!)
Image from Tim Ewin (@tim_ewin)
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Congratulations @NHMdinolab! As you say a very appropriate dinosaur to be named after you! Nice one @Tweetisaurus !
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The oldest evidence of brooding in a Devonian blastoid - implications for the evolution of echinoderm reproductive strategies youtu.be/64XtTuBNcSQ onlinelibrary.wiley.com/doi/… @NidiaArmada @PaleoJB @Pentremites @VirtualPaleaeo @MorphoSource @wileyearthspace
3-D reconstructions of the internal structures of Hyperoblastus reimanni (CMC IP 37404), the oldest brooding echinoderm. Top left: organs of the reproductive system (gonad and brooded juveniles) with the gut in a central position. Middle: diagram of the reconstructed internal structures in the thecal cavity: gut (pink), hydrospires (purple), coelom (orange), empty space inside the vault (green), brooded juveniles (light blue), gonad (dark blue) and structure 1 (grey). Bottom right: coelem.

ALT 3-D reconstructions of the internal structures of Hyperoblastus reimanni (CMC IP 37404), the oldest brooding echinoderm. Top left: organs of the reproductive system (gonad and brooded juveniles) with the gut in a central position. Middle: diagram of the reconstructed internal structures in the thecal cavity: gut (pink), hydrospires (purple), coelom (orange), empty space inside the vault (green), brooded juveniles (light blue), gonad (dark blue) and structure 1 (grey). Bottom right: coelem.

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Some stunning crinoids from Canada. The large tongue-shaped extension in the cream coloured specimen is a huge anal pyramid! This may also be where the gonads were located (hence large size) and differs from modern crinoids where they are located on the arms.
Dr. James Lamsdell (@FossilDetective) profile pictureDr. James Lamsdell@FossilDetective19 May 2023
Assorted crinoids from the Royal Ontario Museum Dawn of Life gallery this #FossilFriday. Despite being commonly called "sea lilies", crinoids are echinoderms (one of the more interesting groups I don't work on, which includes things like sea urchins).
A crinoid with a long projection in the centre of thing, spindly arms. This one did not get the memo about being a lily and became corn instead.

ALT A crinoid with a long projection in the centre of thing, spindly arms. This one did not get the memo about being a lily and became corn instead.

The top of a crinoid with many subdivided arms with lots of fine filters on them.

ALT The top of a crinoid with many subdivided arms with lots of fine filters on them.

A long stalked crinoid with very thick arms.

ALT A long stalked crinoid with very thick arms.

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It’s on!
Clare Fisher (@Bruchlas) profile pictureClare Fisher@Bruchlas17 May 2023
It’s our 2nd visit behind the scenes @NHM_London at 8pm @channel5_tv. @tim_ewin investigates a 167 myo ‘marine Pompeii’. @SelBrace collects DNA from a bee’s knees and @ChrisGPackham takes to the stage for the Wildlife Photographer of the Year & Hattie takes us to a haunted lift!
Image from Clare Fisher (@Bruchlas)
Image from Clare Fisher (@Bruchlas)
Image from Clare Fisher (@Bruchlas)
Image from Clare Fisher (@Bruchlas)
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It’s our 2nd visit behind the scenes @NHM_London at 8pm @channel5_tv. @tim_ewin investigates a 167 myo ‘marine Pompeii’. @SelBrace collects DNA from a bee’s knees and @ChrisGPackham takes to the stage for the Wildlife Photographer of the Year & Hattie takes us to a haunted lift!
Image from Clare Fisher (@Bruchlas)
Image from Clare Fisher (@Bruchlas)
Image from Clare Fisher (@Bruchlas)
Image from Clare Fisher (@Bruchlas)
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Never thought my mug would be featured in the Radio Times magazine! Check out some of the beautiful fossils we’ve collected and the research we are undertaking on them on Channel 5 at 8pm this Wednesday!
Image from Tim Ewin (@tim_ewin)
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#FossilFriday Another fossil from the Palaeogene Red Bluff Tuff of Chatham Island – a small, flat-topped spine from an echinoid.
Image from NHM_Bryozoa (@BryozoanNhm)
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Job alert at the NHM: NERC Postdoctoral Researcher in Palaeoecology Chalk macrofossils, palaeoecology, climate change, field/collections work etc. Applications due by 1st June. careers.nhm.ac.uk/templates/…
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Am on a Channel 5 episode in a series exploring the work the natural history museum does. It features the Wiltshire fossil site (that contains thousands of exceptionally preserved echinoderms) and some of the research we are doing.
Image from Tim Ewin (@tim_ewin)
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The coordinated behaviour of tube feet along an Ophiuroid arm is fascinating to see. Love how the tube feet immediately go back to food capture again after they’ve passed the parcel!
みさきのうみしだ (@Crinoidea_hk) profile pictureみさきのうみしだ@Crinoidea_hk7 May 2023
アカクモヒトデ Ophiomastix mixta Lütken, 1869の摂餌行動です。管足を上手に使って餌を口の方向に移動させています。まるで運動会の大玉転がし（送り？）みたい。
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Absolutely love this!
みさきのうみしだ (@Crinoidea_hk) profile pictureみさきのうみしだ@Crinoidea_hk18 Apr 2023
また、組画像を作ってみました。 生き物は皆美しい！
Image from みさきのうみしだ (@Crinoidea_hk)
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Wonderful day @NHM_London with @tim_ewin @VirtualPalaeo and Ebony looking at the wonderful Wiltshire crinoid material as part of our @NERCscience grant with @echinerd
Image from Emily G Mitchell (@EGMitchell)
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Close up of a crinoid arm! The zigzag line up the middle is the food groove. Food particles captured by sticky tube feet are passed into this and small hairs lining the groove push it to the mouth at the top centre of the cup. The groove size limits the size of food it can eat.
みさきのうみしだ (@Crinoidea_hk) profile pictureみさきのうみしだ@Crinoidea_hk1 Apr 2023
現在飼育中の長崎県産のコヒゲクシウミシダ Clarkcomanthus comanthipinna (Gislén, 1922) の拡大画像です。羽枝や腕の口側には口まで続く細い線状の溝があります。これは食溝と呼ばれる器官で、この溝を通って餌が口まで運ばれていきます。
Image from みさきのうみしだ (@Crinoidea_hk)
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A beautiful stalked Metacrinus crinoid from waters around Japan.
みさきのうみしだ (@Crinoidea_hk) profile pictureみさきのうみしだ@Crinoidea_hk31 Mar 2023
現在飼育中の長崎県産のトリノアシ Metacrinus rotundus P. H. Carpenter, 1885 と思われるゴカクウミユリ科 Isocrinidae のウミユリです。一見すると植物のようにみえますが、ウニやヒトデと同じ棘皮動物門のウミユリ綱の仲間です。
Image from みさきのうみしだ (@Crinoidea_hk)
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More Jurassic fossil feather stars (comatulid stalkless crinoids) from the Wiltshire lagerstatte. Complete Jurassic feather stars are rare as their multipart skeleton is held together by soft tissue. But they are abundant at this site, 20+ complete individuals on this slab alone!
Image from Tim Ewin (@tim_ewin)
Image from Tim Ewin (@tim_ewin)
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