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Oleksandr Holovachov

@holovachov.bsky.social
61 followers 41 following 61 posts

Nematologist

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Reposted by Oleksandr Holovachov
Genetics Society of America @genetics-gsa.bsky.social · 27/06/2026
🧬 A new genome assembly of Echinomermella matsi, an enigmatic, body cavity parasite of the green sea urchin, will help illuminate the biology of this poorly understood marine species. 🪱 Find more in the June issue of #G3journal 🔗 buff.ly/10KlTwF 📷️ credit: @holovachov.bsky.social
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Reposted by Oleksandr Holovachov
worm~lab nemahunters @worm-lab.bsky.social · 14/02/2026
As one part of our many international collaborations, our team of the Biodiversity Genomics Center Cologne, BioC2 @unicologne.bsky.social, conducted a @nanoporetech.com workshop at the UNAM in Windhoek last week. Big thanks to Tarja Hoffmeyer and Joseph Kirangwa for running this. Long-reads rule!
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Zoological Journal of the Linnean Society @zoojlinnsoc.bsky.social · 07/02/2026
We couldn't do it without our authors, and we look forward to another year of ground breaking research published with us. If you want to be part of our history, why not consider one of our journals as the home for your research this year? academic.oup.com/biolinnean/p...
academic.oup.com
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Reposted by Oleksandr Holovachov
Zoological Journal of the Linnean Society @zoojlinnsoc.bsky.social · 07/02/2026
We reinvest back into our journals through our expert Editorial Office, ensuring a high-quality peer review process. Additionally, we promote authors’ work & showcase the research we publish through blogs, online lectures & in-person events, making science accessible to all (3/4).
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Zoological Journal of the Linnean Society @zoojlinnsoc.bsky.social · 07/02/2026
As a not-for-profit organisation, the research published with us goes directly towards funding our community outreach & engagement. Most notably, this includes our historical collections, extensive education and events programmes, and our prestigious medals, prizes and awards. (2/4)
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Zoological Journal of the Linnean Society @zoojlinnsoc.bsky.social · 07/02/2026
Why not publish your research with a Society Journal? 🧪🌍 The Linnean Society is committed to publishing high-quality and ground-breaking scientific research across the four themes of botany, zoology, biology and evolution, striving to make these accessible & engaging to a global audience. 🧵(1/4)
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worm~lab nemahunters @worm-lab.bsky.social · 30/01/2026
#nemahunters assemble! @holovachov.bsky.social
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bioRxiv Genomics @biorxiv-genomic.bsky.social · 16/01/2026
The genome of an enigmatic sea urchin parasite Echinomermella matsi Jones & Hagen, 1987 resolves its place among other invertebrate parasitic nematodes www.biorxiv.org/content/10.64898/20…
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Reposted by Oleksandr Holovachov
phy_papers @phypapers.bsky.social · 17/01/2026
The genome of an enigmatic sea urchin parasite Echinomermella matsi Jones & Hagen, 1987 resolves its place among other invertebrate parasitic nematodes www.biorxiv.org/content/10.64898/20…
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bioRxiv Zoology @biorxiv-zoology.bsky.social · 08/01/2026
Panagrolaimus einhardi sp. nov. and two sisters of fortune www.biorxiv.org/content/10.64898/20…
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David Pires @david1822.bsky.social · 19/01/2026
www.nature.com/articles/s41...
nature.com
High-resolution single-nematode transcriptomic datasets of plant-parasitic nematodes from juveniles to adults - Scientific Data
Scientific Data - High-resolution single-nematode transcriptomic datasets of plant-parasitic nematodes from juveniles to adults
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Reposted by Oleksandr Holovachov
Science X / Phys.org @sciencex.bsky.social · 13/01/2026
Soil in the Atacama Desert supports unexpectedly diverse and resilient nematode populations, with biodiversity patterns closely linked to elevation, precipitation, and temperature gradients. doi.org/hbjtfx
phys.org
Organisms in the Atacama Desert soil are remarkably diverse, study shows
A new study shows that resilient and remarkably diverse populations of organisms can persist in the soil despite harsh and extremely dry conditions.
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Reposted by Oleksandr Holovachov
Paul Kardol @paulkardol.bsky.social · 26/11/2025
Explore how soil food webs withstand droughts and heatwaves, and what this means for tree regeneration in Swedish forests! 🌲🪱🌳🍄Become a PhD student in the WIFORCE Research School and work with us at SLU-Uppsala @mycopat.bsky.social #climate #forest #microbes #nematodes www.slu.se/en/about-slu...
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Kevin Kocot @kmkocot.bsky.social · 26/11/2025
Marine Meiofauna Diversity field course June 8-18, 2026 at Tjärnö Marine Laboratory, Sweden
slu.se
Marine Meiofauna Diversity – field course | slu.se
Exploring microscopic animals that shape marine ecosystems, June 8-18, 2026 at Tjärnö Marine Laboratory on the Swedish west coast.
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Reposted by Oleksandr Holovachov
Philipp Pröts @pproets.bsky.social · 15/11/2025
Am glad to present to you, our morphological work on the pharynx associated musculature (with emphasis on the spiral muscle!) of #Stilbonematinae ( #Nematoda, Desmodoroidea) is finally out. It supports a sister group relationship between Dorylaimia and Chromadoria. link.springer.com/article/10.1...
link.springer.com
Pharynx associated musculature in the Stilbonematinae (Desmodoroidea, Nematoda) with focus on the spiral muscle as a synapomorphic trait between Dorylaimia and Chromadoria - Organisms Diversity & Evol...
Recent molecular phylogenies of Nematoda have suggested a sister-group relationship between Dorylaimia and Chromadoria, but supporting morphological evidence has so far been lacking. Using immunohisto...
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Oleksandr Holovachov @holovachov.bsky.social · 25/10/2025
Warning to all interested in metagenomics. If you want to try using github.com/benn888/PRON... – DO NOT! The script is missing all required dependencies and is a waste of your time on ARM64bplatform. I do not believe www.frontiersin.org would publish anything so poorly written and untested.
github.com
GitHub - benn888/PRONAME: PRONAME is an open-source bioinformatics pipeline that allows processing and significantly increasing the accuracy of Nanopore metabarcoding sequencing data.
PRONAME is an open-source bioinformatics pipeline that allows processing and significantly increasing the accuracy of Nanopore metabarcoding sequencing data. - benn888/PRONAME
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Oleksandr Holovachov @holovachov.bsky.social · 24/10/2025
Ultraconserved Elements and Machine Learning Classifiers Enable Robust Phylogenetics and Taxonomy in Model and Non-Model Nematodes doi.org/10.1111/1755...
doi.org
Ultraconserved Elements and Machine Learning Classifiers Enable Robust Phylogenetics and Taxonomy in Model and Non‐Model Nematodes
Nematodes are among the most diverse animals, yet only around 28,000 of an estimated one million species have been morphologically described. Their small size, morphological simplicity, and cryptic d...
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WoRMS @marinespecies.bsky.social · 20/10/2025
www.marinespecies.org/news.php?p=s...
marinespecies.org
Edaphobase adopts Nemys as taxonomic backbone for nematodes
As part of a collaboration between WoRMS and Edaphobase, the World Database of Nematodes (Nemys) has been integrated as the official taxonomic backbone for Nematoda in Edaphobase.
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Oleksandr Holovachov @holovachov.bsky.social · 14/10/2025
New identification manual "Introduction to #Nematodes of the Family Cephalobidae" was released as PDF on my ResearchGate account. Published with Sven Boström with support from @worm-lab.bsky.social and Swedish Museum of Natural History.
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Deepak Haarith, Ph.D. @deepakhaarith.bsky.social · 09/07/2025
I am looking for a PhD student in #molecularbiology #biochemistry #bioinformatics to work with #plants and #nematodes Please share widely. Also, prospective applicants please check out this link: www.alligator.org/article/2024... #PhDposition
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Young Nematologists Network @youngnemas.bsky.social · 10/07/2025
🪱 Calling all Early-Career Nematologists: Registration for #VNC2025 is NOW OPEN! 🎉 If you are MSc student, PhD candidate, or postdoc working in nematology, Register and submit your abstract. Register here👉 lnkd.in/dzTRsK7z ⏰ Registration closes September 10th!!!
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David Pires @david1822.bsky.social · 08/06/2025
#Nematodes: these worms stack together to form living towers edition.cnn.com/2025/06/05/s...
edition.cnn.com
First evidence of ‘living towers’ made of worms discovered in nature | CNN
Scientists captured nematodes that stack themselves into a wriggling, vertical tower for the first time. Watch the tiny architects in action.
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Oleksandr Holovachov @holovachov.bsky.social · 04/06/2025
The ForBio/NRM course on the Identification of Soil and Freshwater #Nematodes is taking place in my office/lab at the Swedish Museum of Natural History www.nrm.se. Morning preparation for live display of fixed and live slide mounted nematodes in progress here.
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Reposted by Oleksandr Holovachov
The Met: Asian Art @metasian.bsky.social · 04/06/2025
Netsuke of a Female Monkey Holding a Nut while her Baby Crawls on her Back www.metmuseum.org/art/collection/se…
Gift of Alvin H. Schechter, 1985
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Reposted by Oleksandr Holovachov
Shahid Siddique @nemaplant.bsky.social · 23/05/2025
New paper alert! A chromosome-scale genome of Meloidogyne hapla. A devastating plant pathogen. But this is not just another genome. www.biorxiv.org/content/10.1... 🧵 NO CANONICAL TELOMERES but a novel 16-mer repeat at chromosome ends. A new mechanism for chromosome-end maintenance?
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Reposted by Oleksandr Holovachov
David Pires @david1822.bsky.social · 29/05/2025
🌍 Save the date! The 36th Symposium of the European Society of Nematologists will take place in Egmond aan Zee, the Netherlands, from June 1–5, 2026. 🔗 First details now live: www.esn2026.nl/copy-of-home #ESN2026 #Nematology
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David Pires @david1822.bsky.social · 29/05/2025
📌 Repost from the Italian #Nematology Society 🎨 𝗡𝗲𝗺𝗔𝗿𝘁 𝗖𝗼𝗺𝗽𝗲𝘁𝗶𝘁𝗶𝗼𝗻: 𝗧𝗵𝗲 𝗕𝗲𝗮𝘂𝘁𝘆 𝗼𝗳 𝗡𝗲𝗺𝗮𝘁𝗼𝗱𝗲𝘀 Unleash your creativity and help spread awareness about #nematodes through art! All forms of artistic expression are welcome. 🆓 Free to enter 📅 Deadline: August 19, 2025
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Reposted by Oleksandr Holovachov
bioRxiv Plant Bio @biorxiv-plants.bsky.social · 23/05/2025
A Chromosome-scale Reference Genome of Meloidogyne hapla reveals localized recombination hotspots enriched with Effector Proteins www.biorxiv.org/content/10.1101/202…
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Raymond L Collett @raymondlc.bsky.social · 21/05/2025
A beautiful Elaphonema sp female found in some dry soil from South Africa. 🐘 First and only discovered in South Africa by Prof J Heyns during his PhD studies 🇿🇦 #nematology #free-livingnematode
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simonebrito.bsky.social @simonebrito.bsky.social · 17/05/2025
Honored to spend the next few weeks at the Swedish Museum of Natural History, working in the Department of Zoology with Prof. @holovachov.bsky.social I’ll be studying new species of marine nematodes. Thanks to @dsbsoc.bsky.social and @hollybik.bsky.social for this amazing experience!
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simonebrito.bsky.social @simonebrito.bsky.social · 17/05/2025
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Bernd Sures @berndsures.bsky.social · 16/05/2025
Great News: Our book Aquatic Parasitology: Ecological and Environmental Concepts and Implications of Marine and Freshwater Parasites has been published online open access! link.springer.com/book/10.1007... @nicojsmit.bsky.social @unidue.bsky.social
link.springer.com
Aquatic Parasitology: Ecological and Environmental Concepts and Implications of Marine and Freshwater Parasites
A unique open access collection on ecological and environmental parasitology in marine and freshwater. Covers climate change and parasite conservation.
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The Global Soil Biodiversity Initiative @thegsbi.bsky.social · 15/05/2025
📢The Global Soil Biodiversity Conference 2026 abstract submission portal is NOW OPEN 🐛🐜🕷️🦠🪱 Abstracts are due July 15th 23:59 PDT ‼️ Submit an abstract 👇 globalsoilbiodiversity2026.org/abstract/
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Ashmolean Museum, Oxford @ashmoleanmuseum.bsky.social · 15/05/2025
Here we share the inspiration for today’s animation. This cute carving of a seated monkey holding a crab is a Japanese netsuke, which were used to secure small personal items such as purses, pipes or medicine containers to a kimono sash (obi).
A netsuke depicting a monkey with a baby riding on its back. The monkey holds a crab by the legs.
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Reposted by Oleksandr Holovachov
Patrick Kapty @patrickkapty.bsky.social · 15/05/2025
'Owl attacking a bat' netsuke ebony wood with inlays 19th century CE Japan #handmade #japanese #netsuke #circa19thcentury #Japan #japanesecraft #carved #wood #inlay #japaneseart #art #tiny #sculpture #utilitarian #usefulart
A netsuke is a small carved ornament, especially of ivory or wood, worn as part of Japanese traditional dress as a toggle by which an article may be attached to the sash of a kimono.
A netsuke is a miniature sculpture, originating in 17th century Japan. Initially a simply-carved button fastener on the cords of an inrō box, netsuke later developed into ornately sculpted objects of craftsmanship.
Like all art objects of great worth, netsuke distill the essence of a specific time and place. Worn as part of a traditional Japanese man’s ensemble from the 17th-century onwards, the netsuke’s purpose was hyper-specific, and its functional simplicity lent artists unlimited freedom to constantly redefine what it could be.

Formally, netsuke have few requirements: they must be small, they must have holes through which to pass a single cord, and they must have no protuberances that could damage one’s kimono. Everything else is left to the carver’s imagination. As such netsuke differ in style, subject and material as widely as the personalities of their makers, and they are consequently supremely collectable.
Netsuke emerged as a practical solution to dressing in 17th-century Japan. ‘Men’s kimonos didn’t have sewn-up sleeves — they were completely open, front and back, and that meant that the sleeves couldn’t be used as a pocket, as they could in women’s kimonos,’ Goodall explains. To carry things suchas tobacco, medicine or other necessities, men hung stylish inro and other vessels from cords looped under and behind the wide sashes that held their kimonos in place. At the other end of those cords, men fastened small, ornamental objects as counterweights; those objects evolved into netsuke.
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Oleksandr Holovachov @holovachov.bsky.social · 14/05/2025
I am starting a new long thread, dedicated to a project funded by the Swedish Taxonomy Initiative / Artdatabanken www.slu.se/artdatabanken/ and focusing on the diversity of #nematoda associated with insects in Sweden.
slu.se
Ett kunskapscentrum för arter och naturtyper | slu.se
SLU Artdatabanken är ett kunskapscentrum för arter och naturtyper. Vi arbetar med faktainsamling, information och forskning om biologisk mångfald i Sverige.
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カタクラケンタ/ Katakura Kenta @katakurakenta.bsky.social · 14/05/2025
Just finished. Texts are in ALT.
Title : Marumetako (Spherical octopus)

 Material: deer antler

 Size: 2.6cm x 2.5cm x 2.1cm

 2025


 I thought to myself, "I haven't carved an octopus in about a year," so I decided to create a composition of an octopus by itself for the first time in a while.

 Mollusks are soft and pliable with muscular ridges, and I feel that the difference between the two is a very attractive motif.

 This time, while carving out the shape of such an octopus, I created a work that is small enough to be easily used as a netsuke in everyday life.
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Oleksandr Holovachov @holovachov.bsky.social · 14/05/2025
An unidentified species of #Caenorhabditis from the Atacama desert in Chile is growing now in my lab :-)
Caenorhabditis
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The Kimono Gallery @roger1952.bsky.social · 08/05/2025
A netsuke figure of a sleeping boar covered by grasses. This netsuke dates from the Meiji period. (Source: metmuseum.org)
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Nature Reviews Biodiversity @natrevbiodiv.nature.com · 05/05/2025
ICYMI: New online! Utilizing aquatic environmental DNA to address global biodiversity targets
bit.ly
Utilizing aquatic environmental DNA to address global biodiversity targets
Nature Reviews Biodiversity, Published online: 28 April 2025; doi:10.1038/s44358-025-00044-xAquatic eDNA-based technologies offer the potential for universal and standardized biodiversity monitoring. In this Perspective, Altermatt et al. discuss how these technologies can help to achieve the targets of the Kunming–Montreal Global Biodiversity Framework through informing appropriate policy and actions, and describe the next steps required for widespread and equitable use of these technologies.
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Emilia Hannula @ehannula.bsky.social · 06/05/2025
Looking for a database to functionally assign your 18S (terrestrial)data to trophic groups? Look no further! Our article is published here: doi.org/10.1111/1755... and you can find the database here as a R package: github.com/lentendu/Euk... #soils #eukaryotes #protists #fungi
doi.org
EukFunc: A Holistic Eukaryotic Functional Reference for Automated Profiling of Soil Eukaryotes
The soil eukaryome constitutes a significant portion of Earth's biodiversity that drives major ecosystem functions, such as controlling carbon fluxes and plant performance. Currently, however, we mis...
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Parasite - The Journal @parasitejournal.bsky.social · 03/05/2025
New paper in press in Parasite: Reverse vaccinology for hookworms: a rational selection of vaccinable antigens against parasitic nematodes 🧪 🔜 www.parasite-journal.org
Figure 1. In silico vaccine discovery workflow aimed at identifying potential vaccinable antigens for the treatment of hookworm disease.
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Josh Luke Davis 🏳️‍🌈 @joshlukedavis.com · 02/05/2025
This is a really cool one for #FossilFriday! Researchers have found the fossil a 165-million-year-old endoparasitic worm, and speculate that its size means it's not beyond the realms of possibility that it was once infecting dinosaurs 👀🦖🧪 www.nhm.ac.uk/discover/new...
nhm.ac.uk
Jurassic fossil of a parasitic worm fills evolutionary gap | Natural History Museum
A rare fossil has been identified as an ancient species of internal parasite.
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Worcester MA Info @worcestermainfo.bsky.social · 20/04/2025
Happy Easter everyone! I love netsuke. I own a number of reproductions. I don't have this one! It's a historic Japanese ivory netsuke late 1800s from the Worcester Art Museum @worcesterartmuseum.bsky.social #easter #rabbit #bunny #japan #japanese #art #artist #Worcester #Worcesterma #Massachusetts
Rabbit netsuke
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chicworld @shelikhovskij.bsky.social · 02/05/2025
Netsuke sleeping cat. Japan, late 19th century. Material ivory
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Ocean Census @oceancensus.bsky.social · 02/05/2025
📢 New publication from the Ocean Census #BountyTrough expedition! Congratulations to Daniel Leduc and Zeng Qi Zhao: “Three new nematode species (Chromadorida: Selachinematidae) from the continental slope of New Zealand” (2025). 🔗 Full paper europeanjournaloftaxonomy.eu/index.php/ej...
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Nature Reviews Biodiversity @natrevbiodiv.nature.com · 01/05/2025
ICYMI: New online! Parasitism as a driver of host diversification
bit.ly
Parasitism as a driver of host diversification
Nature Reviews Biodiversity, Published online: 24 April 2025; doi:10.1038/s44358-025-00045-wParasites and their hosts can have complex ecological interactions and evolutionary histories. This Perspective argues that parasites are a major driver of host speciation and outlines an empirical framework for testing this hypothesis.
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Rick Masonbrink @naturesenigma.bsky.social · 30/04/2025
The tutorial for how to assemble organellar genomes from nuclear-targeted long reads is ready to be used. Please check it out bioinformaticsworkbook.org/dataAnalysis... #Genome #genomics #assembly #bioinformatics #chloroplast #mitochondria
bioinformaticsworkbook.org
Extracting and Assembling a Mitochondrial and Chloroplast Genome from Nuclear-targeted Nanopore Reads
A workbook to help scientists working on bioinformatics projects
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Nat Prunet @nat-prunet.bsky.social · 25/04/2025
Finding edges really makes lily #pollen looks cooler too! #microscopy #bioart #sciart #fluorescencefriday
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Nat Prunet @nat-prunet.bsky.social · 25/04/2025
Finally figured out how to use the "find edges" function on Fiji (thanks @maikbischoff.bsky.social). Here are 2 depth color-coded projections of a #pollen grain - left one after finding edges #microscopy #bioimaging #bioart #sciart #confocal #fluorescencefriday #botany #plantscience
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