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Maarten Larmuseau

@maartenlarmuseau.bsky.social
214 followers 170 following 25 posts

Professor in Genetic Genealogy @KU_Leuven Biologist & geneticist inspired by genealogy, history, museums & art

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Maarten Larmuseau @maartenlarmuseau.bsky.social · 21/01/2026
Zoek mee in jouw stamboom naar #patrijskinderen: voorhuwelijkse kinderen die later ‘gewettigd’ werden door een ‘vader op papier’. Was hij ook de biologische vader? Met citizen science combineren we archiefonderzoek + DNA (KU Leuven). Meedoen kan t.e.m. 30/06/2026 👉 depatrijzen.be 🔍🧬
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Luc Int Panis @lucintpanis.bsky.social · 21/01/2026
Nieuw citizen-science onderzoek! Dacht je dat men vroeger altijd wachtte met kinderen tot na het huwelijk? Zeker niet! In de 19de eeuw kreeg in Vlaamse steden tot 𝗲́𝗲́𝗻 𝗼𝗽 𝘃𝗶𝗲𝗿 𝗺𝗼𝗲𝗱𝗲𝗿𝘀 haar eerste kind vóór het huwelijk. www.kuleuven.be/depatrijzen/...
kuleuven.be
Doe mee
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VSC | Vlaams Supercomputer Centrum @vschpc.bsky.social · 28/05/2025
🧬 Over 1,000 years of history revealed from 3,000+ burials in Sint-Truiden. Researchers from KU Leuven & global partners uncovered genetic traces of migration, ancestry & the Black Death, powered by VSC 💻 📰 Read more www.vscentrum.be/post/discove... #HPC #DNA #Paleogenomics #Supercomputing
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 20/05/2025
Yes, correct! OLV is the name of the church in Sint-Truiden. Best wishes
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 20/05/2025
Dankjewel Lieven!
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 20/05/2025
For all the details, read our paper: genomebiology.biomedcentral.com/articles/10....
genomebiology.biomedcentral.com
Urbanization and genetic homogenization in the medieval Low Countries revealed through a ten-century paleogenomic study of the city of Sint-Truiden - Genome Biology
Background Processes shaping the formation of the present-day population structure in highly urbanized Northern Europe are still poorly understood. Gaps remain in our understanding of when and how cur...
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 20/05/2025
For the first time, we could reconstruct migration, family structure, urban development and epidemics in one medieval town in Flanders. (9/9) Many congrats to Owyn Beneker, Toomas Kivisild, Christiana Scheib & all co-authors! Thanks to @fwovlaanderen.bsky.social and agentschap Onroerend erfgoed
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 20/05/2025
We found few family ties among the 400 individuals—far fewer than in medieval Cambridge (UK). Only near the abbey, in the cemetery’s oldest part, were relatives more often buried together. Likely a reflection of social status. (8/9)
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 20/05/2025
The plague left no significant impact on the population’s genetic makeup. We also found no evidence of lasting changes in immune gene diversity. Other pathogens linked to poverty and poor hygiene were detected too, including Borrelia and Leptospira. (7/9)
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 20/05/2025
For the first time, we found direct evidence of the plague in medieval Flanders: Yersinia pestis DNA in five individuals from the 14th century. They were scattered across the cemetery—not in mass graves. No historical record from 14th-century Sint-Truiden mentions the plague at that time. (6/9)
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 20/05/2025
From the 11th century onward, the population became genetically more homogeneous—similar to today’s people from region. This was result of centuries of mixing between ‘Gallic’ (blue) & ‘Germanic’ (orange) ancestral groups, shaping north-south genetic gradient still visible in Low Countries. (5/9)
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 20/05/2025
The earliest inhabitants (8th–10th century) were remarkably genetically diverse (red on PCA). Differences between Flemish sites were then almost as large as those between present-day Flemish & Spanish populations. We even found 5 individuals with ancestry similar to medieval Irish or Scots. (4/9)
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 20/05/2025
Teeth from 400 individuals were sampled as sterile as possible for ancient DNA. The result: a genetic timeline of a millennium, spread across the entire cemetery. (3/9)
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 20/05/2025
In 2019, more than 3000 skeletons were excavated beneath the Groenmarkt in Sint-Truiden, the historic cemetery of the Church of Our Lady. For centuries, it lay also in the shadow of the influential abbey of Saint Trudo (†693). (2/9)
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 20/05/2025
Discover our results of the largest ancient DNA study ever conducted on a single burial site: 400 skeletons from the Belgian city Sint-Truiden (8th–18th century). A unique glimpse into 1000 years of genetic history. (1/9) @kuleuvenuniversity.bsky.social
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 08/05/2025
We proudly present UYSD: a new open-access repository with global Y-SNP haplogroup frequencies. A valuable resource for forensic genetics, genetic genealogy, population studies, and more. 👉 www.nature.com/articles/s41...
nature.com
UYSD: a novel data repository accessible via public website for worldwide population frequencies of Y-SNP haplogroups - European Journal of Human Genetics
European Journal of Human Genetics - UYSD: a novel data repository accessible via public website for worldwide population frequencies of Y-SNP haplogroups
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 08/05/2025
🎬 Aanrader: gratis documentaire ‘Vermist en Gevonden’ ging gisteren in première in @StadIeper! Leerlingen uit het secundair onderwijs onderzoeken het lot van vermiste WOI-soldaten. Ik praat met hen over DNA-identificatie en ethische kwesties. Bekijk hier 👉 www.youtube.com/watch?v=_fkm...
youtube.com
Vermist en Gevonden | Missing and Found
YouTube video by In Flanders Fields Museum
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Strathclyde Institute for Genealogical Studies @strathgenealogy.bsky.social · 31/03/2025
Hear Prof. dr. Maarten H.D. Larmuseau’s talk “Mommy’s baby, daddy’s maybe”: Genetic genealogical reconstruction of extra-pair paternity behaviour. Prof. dr. Larmuseau is a genetic genealogist at KU Leuven (University of Leuven, Belgium). 🎟️Register > bit.ly/3QzHhe9
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 02/04/2025
Apparently I have an "oddly specific scientific obsession"... guilty as charged 😅 Thanks #TILscience for the nice video on our research @kuleuvenuniversity.bsky.social www.youtube.com/shorts/1hrr2...
youtube.com
Who’s Your Daddy?? No seriously.
YouTube video by Today I Learned Science
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Andrew Curry @andrewcurry.com · 10/03/2025
I'm on the @science.org podcast this week with @maartenlarmuseau.bsky.social & @bscelza.bsky.social talking about genetic genealogy, cuckoldry and extra-pair paternity: www.science.org/content/podc... (Starting around 15:00)
science.org
Intrusive thoughts during pregnancy, paternity detectives, and updates from the Trump Tracker
On this week’s show: The latest news on how U.S. government science agencies are being impacted by President Donald Trump’s administration, how researchers are using genealogy and DNA testing to find ...
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 07/03/2025
Honoured to see an article about my research on extra-pair paternity in @science.org. Many thanks to journalist @spoke32.bsky.social for the story and to all colleagues for their quotes! Hopefully, future visitors to my office will be less surprised by a (reproduction) 17th-century painting...
science.org
How often are children genetically unrelated to their presumed fathers?
Tackling a touchy subject, genetic detective finds only 1% of European children have unexpected paternity
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Katherine Stiles @katherinestiles.org · 07/03/2025
Geneticist @maartenlarmuseau.bsky.social tackles a touchy question: How often are children genetically unrelated to their presumed fathers?
science.org
How often are children genetically unrelated to their presumed fathers?
Tackling a touchy subject, genetic detective finds only 1% of European children have unexpected paternity
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 25/02/2025
Looking forward to my keynote talk 'Mommy's baby, daddy's mayby' at the (online) genetic genealogical symposium! Booking is now open 👇 www.strath.ac.uk/studywithus/...
strath.ac.uk
Advancing Genetic Genealogy | University of Strathclyde
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 14/02/2025
Dit weekend is het groot feest in Leuven voor de 600ste verjaardag van onze alma mater KU Leuven! 🎉🍾 Zoveel te beleven maar je kan starten met mijn 600 sec lezing over 'Het DNA-verhaal van Vlaanderen'. 🧬 Iedereen welkom om 10u in de promotiezaal, Naamsestraat 22 www.kuleuven.be/600jaar/prog...
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 03/02/2025
Important critique by individuals who personally discovered their #misattributed #paternity. Their analysis exposes ethical and clinical shortcomings in current medical guidelines. The discussion on transparency needs to be reassessed. 👉https://www.cell.com/ajhg/fulltext/S0002-9297%2825%2900006-0
cell.com
Misattributed paternity discovery: A critique of medical organizations’ recommendations
The five authors recently discovered their misattributed paternity (MP), two ascertaining that, decades ago, their pediatricians abetted the paternity deception. From their unique perspective, the aut...
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 22/01/2025
Ik heb de fouten laten weten! @vrtnws.bsky.social
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 22/01/2025
2 fouten in 1 quote bij vrtnws🫣: "Ze hebben enerzijds het mitochondriaal DNA bestudeerd. Dat is DNA dat zich op de celwand bevindt en enkel via moeder op dochter wordt doorgegeven". Het bevindt in mitochondriën en niet in celwand, en het is via moeder op kind (ook zoon). www.vrt.be/vrtnws/nl/20...
vrt.be
Meisjes aan de macht? DNA-onderzoek suggereert dat mannen hun vrouwen volgden bij Kelten in Verenigd Koninkrijk
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 15/01/2025
Ancient DNA reveals fascinating patterns in Iron Age Britain🧬Genomes from Durotriges tribe uncovers a matrilocal pattern, previously undescribed in European prehistory. Dominant maternal lines shaped southern Britain's genetic landscape.⚡ #AncientDNA #IronAge www.nature.com/articles/s41...
nature.com
Continental influx and pervasive matrilocality in Iron Age Britain - Nature
An analysis of ancient mitochondrial and nuclear DNA shows evidence of matrilocal communities in Iron Age Britain.
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Spoorzoeker - Peter Eyckerman @peycker.bsky.social · 23/12/2024
Leuk artikel van @maartenlarmuseau.bsky.social in de standaard vandaag! Ik had nog niet op dat verschil gelet. m.standaard.be/cnt/dmf20241...
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 09/01/2025
In our new study, we examine the psychological impact and #MentalHealth challenges following the discovery of a 'not parent expected' (#NPE) result through commercial #DNAtesting. 👉 bmcpsychiatry.biomedcentral.com/articles/10....
bmcpsychiatry.biomedcentral.com
“I’m trying to figure out who the hell I am”: Examining the psychosocial and mental health experience of individuals learning “Not Parent Expected” news from a direct-to-consumer DNA ancestry test - B...
Background According to recent estimates, around 30 million people have taken Direct-to-Consumer DNA ancestry tests, typically marketed as a fun, harmless and exciting process of discovery. These test...
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Maarten Larmuseau @maartenlarmuseau.bsky.social · 19/11/2024
New press article about our ancientDNA study in medieval Flanders 🧬 #archaeology #DNA #Flanders www.medievalists.net/2024/11/earl...
medievalists.net
Who Lived in Early Medieval Flanders? DNA Reveals the Answer - Medievalists.net
Who lived in Flanders during the 7th century, and where did they come from? New DNA research from Merovingian graves in Koksijde has uncovered surprising insights into the region's diverse ancestral o...
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