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sumie-dh @sumie-dh.bsky.social · 30/09/2026

This iteration of #WormWednesday is meta-worming day. At weekend I released lil BioRSS fork with some extra features at my server. Because my server is tiny I reduced intake for worm taxa only + some worm friends. Grab latest papers for your RSS reader or email client on bioosm.brmlab.cz/wormrss

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sumie-dh @sumie-dh.bsky.social · 09/09/2026

Echoes of ISFB, we stopped for planarians during traveling back to our base. Unusually light population of Dugesia gonocephala, Bleicheroder Berge, Germany. #invertebrates #WormWednesday 🧪 🌿

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sumie-dh @sumie-dh.bsky.social · 05/09/2026

Many flatworm folks [who attended XVI ISFB conference and satellite taxonomy symposium] were surprised that there is Discord place focused on worm taxonomy. Yes we have one, here it is disboard.org/server/14331... . Join for daily wormy experience, any worm enthusiast is welcomed ;]

disboard.org

Worm World | DISBOARD: Discord Server List

Wormy place for all worm taxonomists and worm fans. Doesn't matter what vermiform critter is in your radar, every worm lover is welcomed. We can also identify your findings if you have nice photo.

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sumie-dh @sumie-dh.bsky.social · 31/08/2026

In this week there is place in Germany where flatworm taxonomists are going to display some gregarious behavior. Me & the boys bringing these. What they are? Well, catch me at poster session and you will find out ;] See you at Gottingen!

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Chris Mah @echinoblog.bsky.social · 29/08/2026

WHOA. A CLEAR flatworm? about 5 inches long.. about 2025 m North Tutuila Mound, American Samoa #Okeanos #wormwednesday

translucent white flatworm with central threads throughout body.. looks like a white soufle

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sumie-dh @sumie-dh.bsky.social · 07/04/2026

Nature singing trololol song to me once again. #parasitology #pathology This is my currently finished staining session. I will show you later ;]

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sumie-dh @sumie-dh.bsky.social · 10/03/2026

Early #WormWednesday is Glossiphonia which doing best job at being just perfect leech on this photo www.inaturalist.org/observations...

inaturalist.org

Genus Glossiphonia

Glossiphonia from Onex, Ελβετία on July 9, 2021 at 02:35 PM by Eleftherios Katsillis

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sumie-dh @sumie-dh.bsky.social · 03/03/2026

We will be there, catch us if you can. We will most likely bring some planarian things too. XVI International Symposium on Flatworm Biology events.gwdg.de/event/1168/o...

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sumie-dh @sumie-dh.bsky.social · 10/02/2026

Planarian phoresy in practice ;]

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sumie-dh @sumie-dh.bsky.social · 09/02/2026

Possible gregarines in Helobdella stagnalis whole mount. Next year I will pay more attention to this kind of parasites. I'm looking for them in planarians but no result so far. May be a sampling bias. They should be present in dendrocoelids which aren't our target. 🌿 #invertebrate 🧪 #parasitology

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Jean-Lou Justine @jean-lou-justine.bsky.social · 23/01/2026

This is not a land flatworm... it's a land nemertean! In this new paper, we describe its complex mitogenome, report the presence of NUMTs, and even more! 🧪 doi.org/10.1038/s415...

Molecular characterisation of the invasive terrestrial nemertean Geonemertes pelaensis: long and complex mitogenome and presence of NUMTs

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Alejandro Manzano Marín @amanzanom.bsky.social · 13/01/2026

After a long(ish) while, the reference genome for the #leech #Hirudo verbana is officially out! doi.org/10.12688/ope... w/@ergabiodiv.bsky.social, @biogeneurope.bsky.social, @leibnizlib.bsky.social, & @sangerinstitute.bsky.social @dome-vienna.bsky.social, @cemess.bsky.social, @univie.ac.at 1/3..

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sumie-dh @sumie-dh.bsky.social · 20/12/2025

Deep sea polyclads spotted again by @schmidtocean.bsky.social in the Argentine Basin. Specimen have two clearly visible nuchal tentacles, falling under Stylochoidea then. Available at www.youtube.com/watch?v=NqnW...

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Carrie Adler @carrieadler.bsky.social · 12/12/2025

To all current/future planarian enthusiasts: The next installment of the North American Planarian Meeting will occur in June 2026 in Ithaca, New York. We welcome anyone who wants to participate, organized by me and Chris Petersen (Northwestern). Please share far and wide. napm2026.weebly.com

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sumie-dh @sumie-dh.bsky.social · 12/12/2025

Alright, we decided for broader view of worm world in our little Discord server. Various folks working on various different kinds of worms so it was natural change. Planarians included. 🌿 #invertebrate #taxonomy #discord disboard.org/server/14331...

disboard.org

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sumie-dh @sumie-dh.bsky.social · 02/12/2025

Early #WormWednesday, because I want. This looks like one of rare Tasmania dugesiids, most likely Spathula genus. We don't see nice photos of these often. www.inaturalist.org/observations...

inaturalist.org

Genus Spathula

Spathula from Mount Field TAS 7140, Australia on November 25, 2025 at 02:39 PM by Justin Chan

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sumie-dh @sumie-dh.bsky.social · 30/11/2025

Leech lovers have place to stay on Discord now. If you like everything what sucks stops in. It's small but nice place with taxonomic focus. My leech shenanigans are posted here as well. discord.gg/q75c89AuBD

discord.gg

Join the Leech Lovers Discord Server!

Leech scientists, taxonomists, naturalists, and lovers alike | 7 members

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sumie-dh @sumie-dh.bsky.social · 23/10/2025

Strigeid metacercaria shenanigans continuing. Cysts were isolated from Erpobdella octoculata leeches. Polarized for visualization of double-layered cyst wall. One cercaria got out of the cyst, received mugshot as well. Barcoding primers are on the way. #parasitology #FlatwormFriday #invertebrate

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Jean-Lou Justine @jean-lou-justine.bsky.social · 17/10/2025

Now published and open-access: 🧪 doi.org/10.1051/para...

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sumie-dh @sumie-dh.bsky.social · 27/09/2025

I'm not dead. Just very busy. Not much of time for internet at those days. Some adult Dugesia gonocephala from recent Slovakia batch. #FlatwormFriday

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sumie-dh @sumie-dh.bsky.social · 10/08/2025

Huge polyclad pancake sampled today at Mar Del Plata Canyon, Argentina by @schmidtocean.bsky.social. I didn't spotted any significant head features like any type of tentacles which are present in various polyclad group. Available at www.youtube.com/watch?v=ttYm...

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sumie-dh @sumie-dh.bsky.social · 02/08/2025

Another bunch of deep sea polyclads from @schmidtocean.bsky.social Argentina dive 819. Longer ones are somebody from Boninioidea? Really not sure. Anyway, that canyon sediments and rocks are covered by them. Available at www.youtube.com/watch?v=kAxq... and www.youtube.com/watch?v=FJNJ...

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sumie-dh @sumie-dh.bsky.social · 30/07/2025

Six of those Stylochoidea-like polyclads sampled today by @schmidtocean.bsky.social at Mar Del Plata Canyon, Argentina, cca 2500 m. Fine large #polyclads, enough to fill few double wide slides. Good luck with future description of those. Available at www.youtube.com/watch?v=xg9N... #WormWednesday

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Elizabeth Beston @elizabethbeston.bsky.social · 06/07/2025

This is so FREAKIN’ COOL! This calanoid copepod has a friend visiting…INSIDE ITS BODY!! There’s a trematode worm, a parasite, taking up pretty much every micron of this poor dude. You can see the worm’s suckers that is used to attach to its host. AWESOME!! 🦑 #plankton

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sumie-dh @sumie-dh.bsky.social · 22/06/2025

Mothership of Dendrocoelum lacteum found today. We need some for our DNA barcoding shenanigans so I left my den for unexpected fieldwork today. Temperatures were rather hostile but worms are just fine. #WormWednesday 🌿 #invertebrate

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sumie-dh @sumie-dh.bsky.social · 05/06/2025

Theromyzon tessulatum from weekend fieldwork session. This one had one epistylid epibiont, other glossiphonids had none. Weird, this locality is usually quite reliable on epistylid abundance. #WormWednesday 🌿 #invertebrate

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ISYEB @isyeb.mnhn.fr · 22/05/2025

Published in #Check_List, 21(3) "First confirmed records with molecular data of the terrestrial flatworm Bipalium kewense Moseley, 1878 (Tricladida, Geoplanidae) in Madagascar, Egypt..." by Gastineau,R., @jean-lou-justine.bsky.social @isyeb.mnhn.fr et al. #Platyhelminthes 🪱 doi.org/10.15560/21....

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sumie-dh @sumie-dh.bsky.social · 21/05/2025

Alboglossiphonia sp. from latest fieldwork session adding another finding of epistylid epibionts into collection. Case from 2023 is available on bioosm.brmlab.cz/histolka/pro.... Perhaps it's just about looking around. #WormWednesday 🌿 #invertebrate

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sumie-dh @sumie-dh.bsky.social · 14/05/2025

Pair of Dalyellia penicilla whole mounts. One is stained with acetic carmine. #WormWednesday #microscopy

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sumie-dh @sumie-dh.bsky.social · 12/05/2025

Monday is feeding and washing day. Girardia sp. planarians playing tug of war with frozen chironomid during feeding.

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sumie-dh @sumie-dh.bsky.social · 11/05/2025

Grab this if you didn't screamed internally this week yet

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sumie-dh @sumie-dh.bsky.social · 08/05/2025

Me: OK, we need check this on other planarian, let's see Girardia tigrina Brain: OK Brain: Isn't it nematode in the pharyngeal tissue? Me: It is,but later Brain: I wanna nematode! Let's check all slides! Me: No, it's 16 slides, back to original task! Brain: I wanna nematode! Me: OK, but I hate you.

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sumie-dh @sumie-dh.bsky.social · 07/05/2025

Exceptionally large Dugesia gonocephala from latest fieldwork session near Prague #WormWednesday 🌿 #invertebrate

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sumie-dh @sumie-dh.bsky.social · 30/04/2025

Season of tiny blobs is apparently on. Microdalyellia armigera from latest fieldwork session for #WormWednesday. 250x stitch. 🌿 #invertebrate

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sumie-dh @sumie-dh.bsky.social · 28/04/2025

I have special worms this time. This week, after 5 years of looking for planarians I found Dendrocoelum which is not D. lacteum. It's most likely D. coecum, endemic planarian which was known in Central Bohemian valleys. They need further work, 3 blind species possible. Stay tuned ;] #InverteFest

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sumie-dh @sumie-dh.bsky.social · 24/04/2025

#FlatwormFriday. Taenia pisiformis scolex. 4 suckers, calcareous corpuscles in parenchyma are visible under tegument. Nice muscle fibers in parenchymal tissue. Just tiny slice, in mm scale. 500x, H&E, several frames. Not my production, operator was somebody from T. Gerrard & Co, UK #parasitology

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Plazi @plazi-species.bsky.social · 28/03/2025

#NewSpecies! New marine flatworm from #japan just crept in: Prostheceraeus fragum Treatment: treatment.plazi.org/id/F8378799-... Publication: doi.org/10.1080/0022... #JournalOfNaturalHistory #ProstheceraeusFragum #FAIRdata #openaccess #ecology #biodiversity #nature #conservation #worms #flatworm

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WayneS @wsnatureandfossils.bsky.social · 27/02/2025

I headed out with a torch for half an hour this evening and found this flatworm. I think it's one of the non-native ones, although the species has been in the UK since the mid 1800s. Parakontikia ventrolineata #ukwildlife #flatworm #worms

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sumie-dh @sumie-dh.bsky.social · 07/03/2025

Looking for: Sebia MG300 manual. We have one troublemaker who returning weird voltage outputs. No manual found on internetz. 🧪

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sumie-dh @sumie-dh.bsky.social · 26/02/2025

Classy bipaliid for classy #WormWednesday. One of those cases 'I know worm by sight, cannot find fitting species tho'. Probably one of those undescribed folks who waiting for proper label or one of those who is hidden too deep in available archives. www.inaturalist.org/observations...

inaturalist.org

Hammerhead Worms (Subfamily Bipaliinae)

Hammerhead Worms from 印度尼西亚东努沙登加拉省西芒加莱县 on January 26, 2025 at 10:54 PM by Spark

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sumie-dh @sumie-dh.bsky.social · 17/02/2025

Little untold marine story. Those are most likely Rhabdocoela cocoons. No idea if those were left by single animal. Or it is coincidence or sign of gregarious behavior in microturbellarians which producing single capsule [such as Dalyelliidae family]. Questions! 200x. Intertidal zone of Catalonia

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sumie-dh @sumie-dh.bsky.social · 05/02/2025

Early #WormWednesday - it's a marine leech most likely from Piscicolidae family. Beautiful large specimen. Happened today at chmidtocean.bsky.social, catch it here www.youtube.com/watch?v=v8vE...

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Ludwik Gąsiorowski @lgasiorowski.bsky.social · 02/02/2025

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

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sumie-dh @sumie-dh.bsky.social · 14/01/2025

Very nice fallstreak hole example, camera picture is from Tusimice located at North Bohemia, 14.01.2025 10:00 UTC MODIS imagery --> go.nasa.gov/42c0B8w #remotesensing

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