thechitoncorner.bsky.social
Assistant Prof. @univie Mainly tweeting on animal development & evolution. also @ [email protected]. Personal account - views are not of my working group or employer
53 posts
417 followers
631 following
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Right on!
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Die Hände sind noch zu groß:/
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Would native plants outcompete the rhodo in absence of grazers?
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Congrats to all authors, what a cool paper!
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Congrats to Oleg and the department!
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Ok, I was just wondering if the different progenies might have brought their own algae with them.
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And all worms are derived from the same clutch?
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What a beauty!
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Jep, am Freitag und schon retour geschickt!
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Nice!
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Super!
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Will do! 😆
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Will tell the students:)
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Thanks Joaquín!
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Thanks, yes we did :)
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#adhesion #Zoology #Embryology #Spiralia #Lophotrochozoa #superglue #singlesequencing
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Ongoing investigations, integrating data from other developmental stages in our lab, will provide deeper insights into the evolutionary origins of the unique chaetognath body plan.
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Additionally, we identified diverse cell types in the ventral nerve center and validated multiple ciliated cell types previously described through anatomical observations.
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Our findings, supported by previous studies, suggest that the chaetognath adhesive system evolved convergently with those of other metazoans.
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This allowed us to identify the transcriptomic profiles of the cells involved in attachment, neuronal populations, and key cell types in chaetognath hatchlings.
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In our study, now available on #bioRxiv, Cristian—along with June (see previous post on Bluesky), Juan Montenegro, and others—applied single-nuclei sequencing, using a newly sequenced and assembled Spadella genome as a reference.
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Cristian Camilo Barrera Grijalba, a PhD student working with me on the chaetognath adhesive system, has examined the cell types that constitute the latter and other organ systems 🔗 doi.org/10.1101/2025...
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The posterior flexibility of Hox genes—previously hypothesized for chordates—likely contributed to the development of the chaetognath tail during the early Cambrian period.
#InHoxwetrust #Zoology #Embryology #Spiralia #Lophotrochozoa
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The absence of a postanal tail in rotifers and other gnathiferans, combined with the expression of posterior Hox genes in the elongated postanal tail region of chaetognaths, suggests a role for these genes in the formation of this unique structure.
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Anterior marker genes (otx, nk2.1, six3/6) and all Hox genes are expressed in a staggered manner. Additionally, June discovered two previously unidentified posterior Hox genes (Sce-postC and Sce-postD), which are absent in the gnathiferan sister groups studied so far, such as rotifers.