Ludwik Gąsiorowski
@lgasiorowski.bsky.social
Zoologist, morphologist, developmental biologist. Interested in the evolution of diversity of animal body plans.
Assistant Professor at the University of Warsaw.
https://ibe.biol.uw.edu.pl/en/835-2/research-groups/comparative-invertebrate-zoology/
Assistant Professor at the University of Warsaw.
https://ibe.biol.uw.edu.pl/en/835-2/research-groups/comparative-invertebrate-zoology/
What happens if your asexual reproduction goes wrong? For instance, you can grow a head instead of a tail. But if you're a flatworm, it's not that bad - as we showed in our newest paper published in the Proceedings of the Royal Society B: tinyurl.com/4dnp2ffz
October 29, 2025 at 2:53 PM
What happens if your asexual reproduction goes wrong? For instance, you can grow a head instead of a tail. But if you're a flatworm, it's not that bad - as we showed in our newest paper published in the Proceedings of the Royal Society B: tinyurl.com/4dnp2ffz
Another preprint from our lab. This time, we looked into the diversity of Catenulida in Poland (and some other countries) and traced the evolution of important characters on their phylogeny.
Molecular phylogeny of Catenulida (Platyhelminthes) with special focus on their diversity in Poland
Catenulida is a clade of free-living flatworms found abundantly in freshwater habitats across the globe. Despite their ubiquitous distribution, catenulids remain poorly studied; most of the species ar...
www.biorxiv.org
May 26, 2025 at 1:06 PM
Another preprint from our lab. This time, we looked into the diversity of Catenulida in Poland (and some other countries) and traced the evolution of important characters on their phylogeny.
While caring for our beloved Stenostomum, we found bizarre, malformed worms that grow heads instead of tails during paratomy. We tested whether this phenotype is heritable (it’s not) and whether fragments with ectopic heads can retain their reversed polarity (they do). Check out our latest preprint!
Spontaneous ectopic head formation enables reversal of the body axis polarity in microscopic flatworms
In most of the animals the antero-posterior axis is specified during early embryogenesis. However, in the organisms that undergo somatic asexual reproduction constant re-establishment of the body axis...
www.biorxiv.org
May 16, 2025 at 10:33 AM
While caring for our beloved Stenostomum, we found bizarre, malformed worms that grow heads instead of tails during paratomy. We tested whether this phenotype is heritable (it’s not) and whether fragments with ectopic heads can retain their reversed polarity (they do). Check out our latest preprint!
Reposted by Ludwik Gąsiorowski
🌍 4 year, fully funded PhD in Evolutionary Biology at the University of Basel! 🌿
Explore flatworm speciation in the African Great Lakes!
✔️ Fieldwork in Zambia & Tanzania
✔️ Training in phylogenetics, molecular ecology, evolutionary biology & stable isotope analysis
📅 Deadline: May 31, 2025
Explore flatworm speciation in the African Great Lakes!
✔️ Fieldwork in Zambia & Tanzania
✔️ Training in phylogenetics, molecular ecology, evolutionary biology & stable isotope analysis
📅 Deadline: May 31, 2025
March 28, 2025 at 1:02 PM
🌍 4 year, fully funded PhD in Evolutionary Biology at the University of Basel! 🌿
Explore flatworm speciation in the African Great Lakes!
✔️ Fieldwork in Zambia & Tanzania
✔️ Training in phylogenetics, molecular ecology, evolutionary biology & stable isotope analysis
📅 Deadline: May 31, 2025
Explore flatworm speciation in the African Great Lakes!
✔️ Fieldwork in Zambia & Tanzania
✔️ Training in phylogenetics, molecular ecology, evolutionary biology & stable isotope analysis
📅 Deadline: May 31, 2025
Reposted by Ludwik Gąsiorowski
It's official - I'm organizing a field taxonomy workshop on freshwater and limno-terrestrial meiofauna! 27 August-11 Sept, in the Lake District. We have 13 experts covering all major taxa, advanced microscopy, DNA taxonomy, sci-com, publishing. RT! Send your best!
www.nhm.ac.uk/our-science/...
www.nhm.ac.uk/our-science/...
Field workshop on the taxonomy and natural history of freshwater and limno-terrestrial meiofauna | Natural History Museum
www.nhm.ac.uk
April 1, 2025 at 2:27 PM
It's official - I'm organizing a field taxonomy workshop on freshwater and limno-terrestrial meiofauna! 27 August-11 Sept, in the Lake District. We have 13 experts covering all major taxa, advanced microscopy, DNA taxonomy, sci-com, publishing. RT! Send your best!
www.nhm.ac.uk/our-science/...
www.nhm.ac.uk/our-science/...
Reposted by Ludwik Gąsiorowski
Thank you to everyone who joined us at the University of Warsaw #DOKO event yesterday! It was wonderful to meet so many people keen to learn more about UW, its courses, and our student organisations 🧪🦴🦠🔬
March 23, 2025 at 11:43 AM
Thank you to everyone who joined us at the University of Warsaw #DOKO event yesterday! It was wonderful to meet so many people keen to learn more about UW, its courses, and our student organisations 🧪🦴🦠🔬
Reposted by Ludwik Gąsiorowski
This paper provides now solid evidence that the xenacoelomorph male gonopore is homologous to the bilaterian hindgut.
www.biorxiv.org/content/10.1...
www.biorxiv.org/content/10.1...
The xenacoelomorph gonopore is homologous to the bilaterian anus
The bilaterian through gut with an anal opening is a key invention in animals, since it facilitates effective food processing, which allows animals to grow to a larger body size. However, because non-...
www.biorxiv.org
February 12, 2025 at 3:23 AM
This paper provides now solid evidence that the xenacoelomorph male gonopore is homologous to the bilaterian hindgut.
www.biorxiv.org/content/10.1...
www.biorxiv.org/content/10.1...
Reposted by Ludwik Gąsiorowski
I’m delighted to share the latest work of PhD student June Ordonez, who is working with me on the formation of the nervous system in #chaetognaths!
doi.org/10.1101/2025...
doi.org/10.1101/2025...
February 1, 2025 at 10:39 AM
I’m delighted to share the latest work of PhD student June Ordonez, who is working with me on the formation of the nervous system in #chaetognaths!
doi.org/10.1101/2025...
doi.org/10.1101/2025...
We looked into details of the stem cell system of catenulids. Surprisingly, it was very different from the canonical neoblast-based systems of other flatworms. What does it tell about the evolution of stem cells and regeneration? Check in our latest paper in @naturecomms.bsky.social:
bit.ly/3WK2ZzR
bit.ly/3WK2ZzR
February 2, 2025 at 4:07 PM
We looked into details of the stem cell system of catenulids. Surprisingly, it was very different from the canonical neoblast-based systems of other flatworms. What does it tell about the evolution of stem cells and regeneration? Check in our latest paper in @naturecomms.bsky.social:
bit.ly/3WK2ZzR
bit.ly/3WK2ZzR
Reposted by Ludwik Gąsiorowski
Join the "Zoomorphology & Evolution Meeting" at Dep. of Biology, UCPH, 13-19:30, 7 March 2025
Best wishes
Katrine Worsaae & Peter Funch
Best wishes
Katrine Worsaae & Peter Funch
January 20, 2025 at 9:10 PM
Join the "Zoomorphology & Evolution Meeting" at Dep. of Biology, UCPH, 13-19:30, 7 March 2025
Best wishes
Katrine Worsaae & Peter Funch
Best wishes
Katrine Worsaae & Peter Funch
Following up on the paper by @eudaldpascual.bsky.social, I checked the Fox genes complement in additional catenulid and macrostomorph species. It turned out that the evolution of Fox complement in flatworms is related to ancestral losses and multiple, independent, lineage-specific expansions.
Evidence for Multiple Independent Expansions of Fox Gene Families Within Flatworms - Journal of Molecular Evolution
Expansion and losses of gene families are important drivers of molecular evolution. A recent survey of Fox genes in flatworms revealed that this superfamily of multifunctional transcription factors, p...
link.springer.com
January 20, 2025 at 1:11 PM
Following up on the paper by @eudaldpascual.bsky.social, I checked the Fox genes complement in additional catenulid and macrostomorph species. It turned out that the evolution of Fox complement in flatworms is related to ancestral losses and multiple, independent, lineage-specific expansions.
I posted this some time ago on the abandoned platform, but maybe it’s worth advertising here as well:
I’m hiring a post-doc (18 months) for our newly established group at the Institute of Evolutionary Biology in Warsaw.
Apply by 15.12.2024.
More details here: euraxess.ec.europa.eu/jobs/283654
I’m hiring a post-doc (18 months) for our newly established group at the Institute of Evolutionary Biology in Warsaw.
Apply by 15.12.2024.
More details here: euraxess.ec.europa.eu/jobs/283654
November 28, 2024 at 12:25 AM
I posted this some time ago on the abandoned platform, but maybe it’s worth advertising here as well:
I’m hiring a post-doc (18 months) for our newly established group at the Institute of Evolutionary Biology in Warsaw.
Apply by 15.12.2024.
More details here: euraxess.ec.europa.eu/jobs/283654
I’m hiring a post-doc (18 months) for our newly established group at the Institute of Evolutionary Biology in Warsaw.
Apply by 15.12.2024.
More details here: euraxess.ec.europa.eu/jobs/283654