Sign in

Jeremias N Brand 🪱

@brandgefahr.bsky.social
454 followers 947 following 32 posts

Evolutionary biologist studying the evolution of sex and its consequences. Group leader at the University of Basel. My current focus is flatworm diversity in East Africa. www.jeremias-brand.github.io

PostsRepliesMedia
Jeremias N Brand 🪱 @brandgefahr.bsky.social · 07/09/2026
Very sad to see the success of the AFD in the election in Sachsen-Anhalt. Such a hateful party should not be in government. ✊
010
Reposted by Jeremias N Brand 🪱
Rink Lab @rink-lab.bsky.social · 04/09/2026
Jeremias Brand (@brandgefahr.bsky.social), Christopher Laumer (@tendersombrero.bsky.social), Ignacio Tenaguillo-Arriola, and Ulf Jondelius shared the latest in flatworm genomics for our second session of day three at ISFB XVI.
011
Reposted by Jeremias N Brand 🪱
Jacob Wood @jacob-wood.bsky.social · 31/08/2026
Calma glaucoides and Gargamella rosi nudibranchs at Wembury Point today with @beardybirder.bsky.social
1345
Reposted by Jeremias N Brand 🪱
Camille Cornet @camillecornet.bsky.social · 18/06/2026
🧬🦋 New preprint out! 🦋🧬 What mechanisms underlie large-scale chromosomal rearrangements? Why do rearrangement rates vary so massively across taxa? We explored these questions in Erebia butterflies, a genus with extraordinary chromosome number diversity, from 7 to 52! www.biorxiv.org/content/10.6...
12812
Reposted by Jeremias N Brand 🪱
Nico Posnien @posnienlab.bsky.social · 03/04/2026
🚨 Postdoc Opportunity as part of DFG Research Training Group "GönomiX" at the University of Göttingen! ​We are seeking a bioinformatician/scientist to study cross-species comparison of Gene Regulatory Networks using our "Göttingen Zoo" of emerging model systems. #GoenomiX @bucherlab.bsky.social
11113
Reposted by Jeremias N Brand 🪱
André Marques @amarques.bsky.social · 21/01/2026
📢 Three new #bioRxiv preprints from our team on holocentric chromosomes. Together, they connect centromere repeat evolution, karyotype dynamics, and meiotic recombination outcomes, revealing how holocentric genomes evolve and function. 🧬👇
46036
Reposted by Jeremias N Brand 🪱
JA Fields | NonCompliantCyborg @noncompliantcyborg.bsky.social · 14/11/2025
Couldn’t sleep last night so I designed a white lined Dirona beanie and stayed up til it was finished and out of the wash. #nudibranch 🦑🐙🐡
Side by side of a white lined dirona 3D sculptural embroidered sea slug on a black beanie and a photo of the same species of nudibranch. The beanie has numerous cerata that are all connected at the base like the real animal and posable and movable. The rhinophores have fluffy white fabric at the ends and also stand up.
612922
Reposted by Jeremias N Brand 🪱
Rebecca R Helm @rebeccarhelm.bsky.social · 24/09/2025
I get that the news cycle is packed right now, but I just heard from a colleague at the Smithsonian that this is fully a GIANT SQUID BEING EATEN BY A SPERM WHALE and it’s possibly the first ever confirmed video according to a friend at NOAA 10 YEAR OLD ME IS LOSING HER MIND (a thread 🧵)
715294709899
Reposted by Jeremias N Brand 🪱
Maren Wellenreuther @marenwellenreuther.bsky.social · 05/09/2025
Size matters—but maybe not how we thought. Most chromosomal inversions are just a few hundred bp. Ignoring these “small players” could mean we’ve misunderstood how genomes evolve -out in TREE authors.elsevier.com/a/1ljL1cZ3X3...
02410
Jeremias N Brand 🪱 @brandgefahr.bsky.social · 26/08/2025
I'm currently in a sea of moving cartons getting ready to move on from Göttingen back to Switzerland. Super excited, but it's also frustrating that science requires moving so often... Also why do I have so much stuff? 😬
030
Reposted by Jeremias N Brand 🪱
EvolDir @evoldir.bsky.social · 22/08/2025
Lund University is seeking a postdoc/researcher for an ERC project on gene expression in hybrid Italian sparrows. One-year position with potential extension. Apply here: lu.varbi.com/en/what:job/jobID:8333… #postdoc
lu.varbi.com
Researcher in hybridization induced changes to gene expression
Researcher in hybridization induced changes to gene expression
0714
Jeremias N Brand 🪱 @brandgefahr.bsky.social · 23/08/2025
On my way home from #ESEB25 it was inspiring to see that evolutionary biology research is alive and well! So many new ideas and insights. Thank you to @tonigabaldon.bsky.social @sesbe-org.bsky.social @eseb.bsky.social and all the volunteers for making this possible!
060
Reposted by Jeremias N Brand 🪱
Yi-Jyun Luo @yjluo.bsky.social · 18/08/2025
Delighted to share the peer-reviewed version of our study led by @tomlewin.bsky.social now out in Genome Biology @bmc.springernature.com! We analyzed 64 chromosome-level genomes across 15 animal phyla and found that extensive genome rearrangements are the norm in bilaterians. doi.org/10.1186/s130...
doi.org
Conservation of bilaterian genome structure is the exception, not the rule - Genome Biology
Species from diverse animal lineages have conserved groups of orthologous genes together on the same chromosome for over half a billion years since the last common ancestor of bilaterians. Although no...
69543
Jeremias N Brand 🪱 @brandgefahr.bsky.social · 21/08/2025
Amazing evolutionary biology outreach at the Fiestas de Gràcia in Barcelona. @rawwiberg.bsky.social explained that not everything we assume about sex is a given and that we can learn a lot from the exceptions. #ESEB25
A narrow street decorated for a festival with large, colorful papier-mâché sea creatures hanging overhead, including several Nautilus figures with striped shells. Bright fabric shades in purple, black, and green are strung above, while additional decorations such as flowers and lizards adorn the sides. Apartment balconies and building facades line the street.

A man wearing a headset microphone is giving an outdoor science talk, pointing at a large screen showing an image of the flatworm Macrostomum lignano. The slide text reads "Separate sexes are not a given," with labels pointing to "Testes producing sperm" and "Ovaries producing eggs." Festival decorations, including colorful paper flowers and geometric designs, hang in the background, and people are gathered to watch.
0113
Reposted by Jeremias N Brand 🪱
Henry North @henrylnorth.bsky.social · 20/08/2025
Surely one of the all-time best conference outreach activities: an evolution-inspired decorated street for Les Festes de Gràcia #ESEB2025
03112
Jeremias N Brand 🪱 @brandgefahr.bsky.social · 16/08/2025
In preparation for #ESEB25 I visited the sampling site in Barcelona where the workhorse strain of the planarian research community originates. I’ve spent the last 5 years trying to understand how asexuality evolved in Schmidtea mediterranea—see my talk in session S28.02 to hear all the results!
A stone fountain in a lush garden, featuring a cascading water staircase flowing down multiple steps. The water runs through a stone channel into a spout, then falls into a small circular basin at the base. The structure is framed by greenery, with tall trees and dense bushes surrounding the scene. Fallen leaves and twigs cover the dirt ground in front of the fountain.
1160
Reposted by Jeremias N Brand 🪱
Rebecca R Helm @rebeccarhelm.bsky.social · 10/07/2025
BEHOLD! One of Earth's greatest lineages of life: the lil wiggle arm guys, Meteora. These single-celled critters, originally found in deep-sea sediments, are SO DIFFERENT from other lifeforms on Earth that they're likely in their own kingdom (as in, the Animal Kingdom, the Plant Kingdom etc). 🧪🌿
451534473
Reposted by Jeremias N Brand 🪱
Christian Rellstab @christian-rellstab.bsky.social · 02/06/2025
Find here my announcement for a 2-year post-doc position in ecological genomics of white oaks in the framework of the Horizon project OptFORESTS. I am looking for somebody with strong skills in bioinformatics, landscape genomics, forest genomics, GWAS, and population genetic simulations.
apply.refline.ch
Post-Doc in Ecological Genomics 80-100% (f/m/d)
The Research Unit Biodiversity and Conservation Biology studies the diversity of life in its various forms, from genetic diversity to the diversity of species and ecosystems as well as their interacti...
01811
Reposted by Jeremias N Brand 🪱
Kelley Harris @kelleyharris.bsky.social · 21/05/2025
. @pnas.org just published the final version of our manuscript on how generation time and effective population size interact to shape vertebrate germline mutation rates, led by Luke Zhu and Annabel Beichman: www.pnas.org/doi/10.1073/...
pnas.org
PNAS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...
18132
Reposted by Jeremias N Brand 🪱
Richard Merrill @dickmerrill.bsky.social · 22/04/2025
Really excited that our DFG grant on the Speciation Genomics of Eye Size variation in *Heliconius* has been funded :) In the next weeks, I will post an advert for a PhD, but if you know of good students, please suggest they get in touch. Please repost.
15628
Reposted by Jeremias N Brand 🪱
Chris Laumer @tendersombrero.bsky.social · 01/04/2025
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/...
nhm.ac.uk
Field workshop on the taxonomy and natural history of freshwater and limno-terrestrial meiofauna | Natural History Museum
0107
Jeremias N Brand 🪱 @brandgefahr.bsky.social · 28/03/2025
🌍 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
142
Reposted by Jeremias N Brand 🪱
Chris Laumer @tendersombrero.bsky.social · 18/03/2025
Taking the pulse of meiofauna research in 2025. My biggest take-home message as the head of one panel: evolutionary genomics is not (yet) anywhere near reaching its potential in this field, partly because of a lack of visibility/interdisciplinary education. www.nature.com/articles/s42...
nature.com
Fundamental questions in meiofauna research highlight how small but ubiquitous animals can improve our understanding of Nature - Communications Biology
This paper identifies the top-50 priority questions for meiofaunal research, highlighting their critical roles in biogeochemical cycles and biodiversity. It calls for a balanced research agenda, inter...
0106
Reposted by Jeremias N Brand 🪱
Bugz n Slugz @moistmacro.bsky.social · 09/02/2025
A lot of folks associate #Nudibranchs with spectacular colours - but there are many that have evolved to just blend into the background of sponges and weeds. This undescribed Thordisa is a case in point that looks like a fluffy weed. #SeaSlugs #MarineLife #Invertebrates #Macro
A photo of a sea slug that is a uniform dark brown all over but with a highly textured body that makes it resemble a piece of weed. It is on an algae covered log.
2868
Jeremias N Brand 🪱 @brandgefahr.bsky.social · 27/01/2025
A close-up view of individual coral polyps! 🐙
Close-up of individual polyps of a coral. They are withe with a purple area around the mouth opening. It looks like a field of flowers.
170
Jeremias N Brand 🪱 @brandgefahr.bsky.social · 25/01/2025
The first time I saw these algae in a sample I could not believe my eyes. Their movement is so smooth and coordinated!
120
Reposted by Jeremias N Brand 🪱
Roman Ulm @romanulm.bsky.social · 23/01/2025
POSTDOC POSITION AVAILABLE, Geneva, Switzerland - Applications are invited for a postdoc position to study UV-B perception and signalling in plants. Please apply, forward to suitable candidates, and/or repost; many thanks! Deadline February 24, 2025. See www.ulm-lab.ch for more information.
04452
Reposted by Jeremias N Brand 🪱
Bugz n Slugz @moistmacro.bsky.social · 23/01/2025
So this little #SeaSlug is a type of sap sucker in the genus Costasiella. These are not technically #Nudibranch and belong in the super order of #Sacoglossa. They perform kleptoplasty where they steal chloroplasts from their Avrainvillea algae host and utilise them for photosynthesis #🦑 #🦐 #📷
A photo of a small sea slug that is primarily green with pink tipped cerata. The green colour comes from the stolen chloroplasts that the slug uses to photosynthesise and produce sugars. It has two small black “eyes” on its face with a yellow patch below.
931573
Jeremias N Brand 🪱 @brandgefahr.bsky.social · 20/01/2025
Giant clams are fascinating. Not only do they have beautiful colors, but they actually have eyes! The numerous black dots on their mantle are individual eyes, each with lenses capable of forming images. 🐙
4194
Reposted by Jeremias N Brand 🪱
Jennifer M Polinski @jmpolinski.bsky.social · 13/01/2025
Happy #MolluscMonday 🐌 Red-finger aeolis nudibranch (Flabellina verrucosa) under the UNH Pier in New Castle NH in April 2024 #macrophotography #scuba #marinelife
1456
Jeremias N Brand 🪱 @brandgefahr.bsky.social · 13/01/2025
I hope you had a better Monday than this grumpy looking scorpion fish! ☺️🫠🦑
A scorpion fish sitting on a coral rock in the pitch black.
0141
Reposted by Jeremias N Brand 🪱
Dr. Drew harvell @drewharvell.bsky.social · 04/01/2025
A few of my favorite tidepool shots of 2024 from San Juan Island and Monterey, better late than never for #invertefest! #marinelife #tidepool #invert #nudibranch #seastar
3437
Reposted by Jeremias N Brand 🪱
Bugz n Slugz @moistmacro.bsky.social · 02/01/2025
Here is a nice little mollusc for today. Amphioctopus marginatus that most divers refer to as the Coconut Octopus due to its habit of using empty coconut shells to provide itself with a protective shell. #🦑 #🦐 #Octopus #UnderwaterPhotography
A photo from the side of a smallish octopus. Its colouration is cream with a brown vein like pattern across its back and arms. It suckers also have a light blue tinge to them.
09312
Reposted by Jeremias N Brand 🪱
Gabriel Jensen @shallowseasgallery.com · 02/01/2025
For my #newyearnewnudi contribution here is Plocamopherus lucayensis. Fun fact these guys will blink with (very weak) bioluminescence if I disturb their bryozoans home. #nudibranch #marinelife #underwater #🦑
Plocamopherus lucayensis are red orange Nudibranchs that have heads that look like sock puppets and purple beards. They are plentiful on the feather bryozoans all over the bridge.
0256
Jeremias N Brand 🪱 @brandgefahr.bsky.social · 02/01/2025
Top down view of a long-arm cleaner shrimp (Ancylomenes longicarpus). 🦑
Top down view of a long-arm cleaner shrimp (Ancylomenes longicarpus) sitting on top of the tentacles of an anemonie. The shrimp is highly transparent with only the eyes, pincers and tail showing in crisp white and blue painting.
181
Reposted by Jeremias N Brand 🪱
Remy Mac™️ 🤿📸🪸 @remymac.bsky.social · 02/01/2025
Words can't express how jealous I am of Bubble Coral shrimp. Imagine THAT being your home. It'd be like living in a beautiful house made of silk baloons. 🌊🦑🦐
A shrimp living in some Bubble Coral. The shrimp is sea through, blue and orange.Two shrimp in the same coral
1478
Jeremias N Brand 🪱 @brandgefahr.bsky.social · 01/01/2025
To start the new year a long-arm cleaner shrimp (Ancylomenes longicarpus) I saw on our recent trip to the Red Sea. #addOcean
A glass shrimp sitting on top of anemonie tentacles.
2140
Reposted by Jeremias N Brand 🪱
Jean-François Cudennec @limpetnerd.eurosky.social · 30/12/2024
🪼 For #MolluscMonday, a glimpse into the fantastic world of Alexander Semenov, who captures marine invertebrates like no one else 💙 🦑 📷 🌊
A collage of six different photos of marine invertebrates on a black background, including jellyfishes, pteropods, a polychaetes and a clione
15610
Reposted by Jeremias N Brand 🪱
Matt Rockman @wormsrock.bsky.social · 27/12/2024
The blue splotches in the last image are called concrements. They don't look like much in that transmitted light image, but with light from above they are iridescent.
151
Reposted by Jeremias N Brand 🪱
Matt Rockman @wormsrock.bsky.social · 27/12/2024
Just beautiful little animals.
0123
Reposted by Jeremias N Brand 🪱
Matt Rockman @wormsrock.bsky.social · 27/12/2024
Finally organizing some images from my zoology course. Here's the anterior end of a convolutrid acoel flatworm, with symbiotic algae living in its tissues. Acoels are sister to Deuterostomes + Protostomes: they ancestrally lack a through gut and nephridia. Heterochaerus sp., probably. #InverteFest
A gray half-circle entering the frame from the left: this is the front end of a flatworm. There are a few dozen golden circles scattered across it, each a unicellular alga. For this image the animal is on a microscope slide, compressed by a coverslip.
1152
Reposted by Jeremias N Brand 🪱
Existential Comics @existentialcomics.com · 26/02/2024
The Metaphor of Godzilla existentialcomics.com/comic/539
48714