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Erick Arrashy Rudianto

@erickrudianto.bsky.social
250 followers 245 following 158 posts

Invertebrate zoology enthusiasts. Currently working with taxonomy and systematics of marine fish-digenean. Natural history lover and history nerd PhD Student of Marine Science at Universitas Diponegoro

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Reposted by Erick Arrashy Rudianto
Paul D. Taylor @nhmbryozoa.bsky.social · 16/10/2026
#FossilFriday Fittingly, Philip Cambridge bequeathed his large fossil collection to Cambridge University, including an example of a cheilostome bryozoan named, equally fittingly, Goodonia cookae – “good on’ya Cookie” – to honour NHMUK scientist Pat Cook on her emigration to Australia.
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Andy Farke @andyfarke.bsky.social · 16/10/2026
The hollowing out of taxonomic expertise is the silent crisis in our profession. And the worse sin is those who aren't even the slight bit *curious* about learning basic identifications.
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Veeloxxy Bites @the-episiarch.bsky.social · 15/10/2026
A squid banquet with worm fillings - I've written a post about the parasites which infect oceanic squids and use them as a way to climb up the food chain. 🦑🦈🐋 Not even the giant squid is spared as these worms used them as a way to reach sharks and whales 🧪 dailyparasite.blogspot.com/2026/10/anis...
dailyparasite.blogspot.com
<i>Anisakis</i> spp. (<i>et al.</i>)
In the ocean, squids occupy a sort of middle position in the food web. While they are voracious predators that attack anything that moves, t...
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Geoff Read @annelidsci.bsky.social · 15/10/2026
#WormWednesday Terebellides? They all look the same don't they, all 94 species? Not if you look closely, or if you use molecules. Nice photos of two new species from the White Sea. Grosse et al. doi.org/10.1080/1745...
Terebellides nevmyanovi Daeva, Zhadan, Grosse, Amblard & Nygren, 2026
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Veeloxxy Bites @the-episiarch.bsky.social · 11/10/2026
Worms? NO! GIANT BACTERIA Epulopiscium is a type of bacteria that lives in the gut of surgeonfishes. It can grow to 0.6 mm in length and instead of reproducing by dividing into two cells like most bacteria, they actually give birth to live offspring 🧪 www.cell.com/trends/micro...
The life cycle of a Epulopiscium bacteria, showing how it produce and give birth to live offspring
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Paul D. Taylor @nhmbryozoa.bsky.social · 12/10/2026
#MolluscMonday Giants from the south. A display cabinet in the Sedgwick Museum, Cambridge houses huge rudists from the Upper Greensand (Albian) of Shillington, Bedfordshire, an unexpected occurrence in the British Cretaceous far away from the Tethyan homeland of these bivalves.
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Vasily Zlatogursky @zlatogursky.bsky.social · 12/10/2026
and 4. Taq polymerase and 5. Macrolids hint from #apicoplast. But also, not much else I can think of. 🙄 And I don't think this is how fundamental science should be justified. Curiosity and necessity to understand the world, not this practically useful "side effects" should be the main thing.
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Krista Koeller @kristalerista.bsky.social · 12/10/2026
Interviewer: can you explain this gap in your CV? Paleontologist: You mean the ghost lineage? Look fossilization is rare and we don’t have strata preserving the relevant time period. We can infer it was very impressive and doing lots of things that would make one hirable though…
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PARADIVE UW @paleoparadive.bsky.social · 30/09/2026
🦠 We're hiring a 2-year postdoctoral researcher at the Institute of Evolutionary Biology, University of Warsaw, to join the PARADIVE lab: euraxess.ec.europa.eu/jobs/469223
euraxess.ec.europa.eu
Assistant Professor (post-doc) - Faculty of Biology, University of Warsaw (WB-KG-15/2026)
The position of Assistant Professor in the programme/project/undertaking The impact of mass extinctions on parasite diversity and evolution.
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Institute of Evolutionary Biology UW @ibe-warszawa.bsky.social · 01/10/2026
🦎 We're hiring a 3-year postdoctoral researcher at the Institute of Evolutionary Biology, University of Warsaw, to join Dr. Mateusz Tałanda’s lab: euraxess.ec.europa.eu/jobs/469220
euraxess.ec.europa.eu
Assistant Professor (post-doc) - Faculty of Biology, University of Warsaw (WB-KG-14/2026)
Te position of Assistant professor in the project “Long transoceanic dispersals or land bridges? Unravelling biogeographic patterns and the evolutionary success of the lizard superfamily Lacertoidea”.
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Kirsten Sheehy @ksheehy.bsky.social · 21/09/2026
📣 New paper! 📣 ❓Do clonal fish and their sexually reproducing heterospecifics differ in parasite load? 🤒 We found that clonal Amazon mollies were more likely to be infected than Sailfin mollies, but parasite loads were largely the same. 🤔 Could behavior have something to do with this pattern? 1/3
doi.org
Differences in Parasite Infection Status and Behavior Between a Clonal Fish and Her Sexually Reproducing Heterospecifics
We found that Amazons and Sailfins differed in their qualitative, but not quantitative, resistance to parasites. Amazons had worse qualitative resistance (i.e., were more likely to be infected with a...
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Jon Aguiñaga @jon-aguinaga.bsky.social · 21/09/2026
Anotha one! 🐟 This one is special to me. Kirsten conceptualized this cool experiment and brought me along to Texas, where we learned field methods on sampling our fish in the wild and measuring their behavior. Glad to see this out! This is also the first time my photos have been used in a pub!
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Nicole Gerlach @ngerlach.bsky.social · 22/09/2026
This week’s Vertz lab, on fish diversity, summarized in one photo.
An index card on a lab table that says “Teleostei: everybody else” with arrows pointing in all directions. Dozens of glass jars with specimens in them are out of focus in the background. 

For context, there are ~60 extant species of non-teleost ray-finned fish (if I’m doing my math right), and more than 30,000 extant species of teleost.
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Prosanta Chakrabarty @prosanta.bsky.social · 15/09/2026
Another big potential #FishJob Curator of Fishes (or Mammals, but let it be ichthyology) at the American Museum of Natural History careers.amnh.org/postings/4925
careers.amnh.org
Assistant Curator/Assistant Professor, Vertebrate Zoology
The Division of Vertebrate Zoology at the American Museum of Natural History (AMNH) seeks an outstanding tenure-track Assistant Curator/Assistant Professor in either the Department of Ichthyology or M...
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Erick Arrashy Rudianto @erickrudianto.bsky.social · 16/09/2026
Amazing excerpt from this recently published paper about blood flukes (Schistosomatoidea). Just imagine their possible diversity within the dinosaurs... Loker et al. (2026) From Bilharz’s twig to thriving tree: revealing the diversity of blood flukes doi.org/10.1007/s004...
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ざんくるす(Zankurus) @zankurus.bsky.social · 14/09/2026
ホタルビオニハゼのイラスト Double-filamentous shrimpgoby Tomiyaichthys hyacinthinus Sato and Motomura, 2025
ホタルビオニハゼのイラスト(上: オス 35.5 mm SL,下:メス,38.8 mm SL)

ハゼ科オニハゼ属.伊豆大島から西表島にかけての南日本に分布.水深6–35mの内湾の湾口から中程,サンゴ礁域の礁斜面に生息する.礫混じりの砂底や砂泥底で,コトブキテッポウエビと単独かペアで共生する.胸鰭軟条数は17.縦列鱗数は45–48,横列鱗数は14–15.鰓耙数は12–13.背鰭第4–第5棘条間の鰭膜に黒く縁取られた淡色斑がある。尾鰭前半部に2–3列の黄色斑、後方に細長い黄色斑がある。オスの背鰭第2・第3棘条は糸状で橙色斑があり,第4棘条は第1棘条より長い。メスの第1背鰭は台形。瀬能ほか(2004; 2021)や田城ほか(2022)で「オニハゼ属の1種–3」とされていた種.2025年に薩摩半島沖産の標本をもとに新種記載された(Sato and Motomura, 2025).
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うずむ氏 @happy-plana.bsky.social · 14/09/2026
Nice to meet you! I'm seeking for "Turbellarians".
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Harriet B. Drage @harriedrage.bsky.social · 07/09/2026
Interested in fossil arthropods, palaeoecology, dispersal, and interesting methods? 🦀 🌎 I'm hiring a 4-year, fully funded PhD student at the University of Geneva as part of my European Research Council (ERC) grant. Deadline: 16th October. Reach out if any questions! www.unige.ch/sciences/ter...
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Erick Arrashy Rudianto @erickrudianto.bsky.social · 07/09/2026
Phase contrast microscope is amazing! (Olympus CX43, trinocular). I wish I could have one personally...
A phase contrast microscope
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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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Kenneth De Baets @djbirddanerd.bsky.social · 04/09/2026
Interpreting Biotic Interactions in the Fossil Record: Evidence and Evolutionary Significance #paleobiology #paleobiology #fossils #ecology #evolution #EarthHistory #biodiversity
doi.org
Interpreting Biotic Interactions in the Fossil Record: Evidence and Evolutionary Significance
Fossil biotic interactions (fBIs) provide a critical but underutilized window into the ecological and evolutionary dynamics of life through time. Unlike modern ecological data, the fossil record captu...
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Erick Arrashy Rudianto @erickrudianto.bsky.social · 04/09/2026
Just submitted my first PhD chapter 2 days ago. Wish me luck! Now I need to submit 2-3 more. While I want to submit more chapters, I am not experienced enough for my other ideas and my time is quite limited. So I need to contend with that...
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Tom Near @tjnear.bsky.social · 29/08/2026
1/11 🐟 2nd new preprint today from @chasedbrownstein.bsky.social We investigated how losing the swim bladder, the organ that most fishes use to control their buoyancy, has shaped the diversity of ray-finned fishes over 90 million years of Earth history. The results surprised us. 🧵
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Tom Near @tjnear.bsky.social · 29/08/2026
1/7 🐟🧬 New preprint! "The largest radiations of freshwater fishes initiated at the K-Pg boundary" Phylogeny of Otocephala: Clupeiformes, Alepeocephaliformes, & Ostariophysi 144 species, UCEs + whole genomes, Bayesian dating. 11,700+ species covered. Here is what we found 🧵👇
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Erick Arrashy Rudianto @erickrudianto.bsky.social · 29/08/2026
Finally, done with line drawing. Time to digitise them!
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Veeloxxy Bites @the-episiarch.bsky.social · 25/08/2026
Earlier this year I was interviewed by the Let's Talk Scicomm podcast - here's the episode where I talked about writing about parasites and drawing them as monster girls 🧪 science.unimelb.edu.au/engage/lets-...
Philometrid nematodesTina the Tapeworm Queen
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Erick Arrashy Rudianto @erickrudianto.bsky.social · 06/08/2026
Insane, pentastomid fossils!
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Kenneth De Baets @djbirddanerd.bsky.social · 16/10/2025
Who is and who is not a paleontologist? #Paleontology #Paleobiology #Fossils
youtu.be
I am paleontologist. Who is a paleontologist? Who is not a paleontologist?
YouTube video by djbirddanerd
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Erick Arrashy Rudianto @erickrudianto.bsky.social · 06/08/2026
Progress for the second to fourth day. I really need to draw and trace properly...
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Veeloxxy Bites @the-episiarch.bsky.social · 03/08/2026
Hot iridescent worms in your area, Lurking in karstic caves, Slithering out of cave crickets 🧪 dailyparasite.blogspot.com/2025/12/gord...
dailyparasite.blogspot.com
<i>Gordius wulingensis</i>
Horsehair worms are a menace to crickets (as well as mantis , millipedes , and centipedes ) everywhere. Imagine being a cricket going about ...
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Veeloxxy Bites @the-episiarch.bsky.social · 03/08/2026
Gelis agilis is a wingless wasp that gives other parasitoid wasps the heebie jeebies. It's a hyperparasitoid that parasitises the cocoons of parasitoids, and it protects itself with a full spectrum ant disguise 🧪 dailyparasite.blogspot.com/2015/02/geli...
dailyparasite.blogspot.com
<i>Gelis agilis</i>
It's a bug-eat-bug world out there and the same applies to parasitic wasps - even parasites can themselves become parasitised - which is wh...
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Erick Arrashy Rudianto @erickrudianto.bsky.social · 03/08/2026
My uni don't have microscope with drawing tube attachment, so I have to visit Museum Zoologicum Bogoriense to draw my specimens. Well this is the progress for the first day here. I still need to learn to draw though...
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phy_papers @phypapers.bsky.social · 01/08/2026
Protein structure characters in the light of phylogenetic systematics pubmed.ncbi.nlm.nih.gov/42535558
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Kenneth De Baets @djbirddanerd.bsky.social · 25/06/2026
🧵 NEW DISCOVERY: Two new types of #tapeworm eggs found in a #Permian shark #coprolite from Brazil! This record pushes back the fossil record of complex parasite life cycles and is a crucial aspect of understanding host-symbiont #coevolution. #Paleontology #Parasites dx.doi.org/10.4202/app.01294.2025
dx.doi.org
Multiple records of tapeworm eggs from Permian coprolites and their palaeoparasitological significance - Acta Palaeontologica Polonica
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Anthony (Tony) J. Martin @ichnologist.bsky.social · 25/06/2026
Permian shark coprolites with tapeworm eggs, showing parasitic relationship while also suggesting that these Permian sharks may have said, "They pay me in woims." 🧪🦈💩🪱 #PoopScience
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Philip Donoghue @phil-donoghue.bsky.social · 17/07/2026
Our latest: The timescale of nematode evolution reveals late and convergent radiations of parasitism. Led by Liang Lü, with help from @djbirddanerd.bsky.social Mattia Giacomelli @meleonora-rossi.bsky.social Oleksandr Holovachov, Davide Pisani and myself www.nature.com/articles/s41...
nature.com
The timescale of nematode evolution reveals late and convergent radiations of parasitism - Nature Ecology & Evolution
Establishing a universal evolutionary timescale of nematodes has been complicated by their patchy fossil record and analytical limitations. Combining genomic data from 156 nematode species with fossil...
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Paul D. Taylor @nhmbryozoa.bsky.social · 17/07/2026
#FossilFriday Field photograph of a belemnite, partly wrapped in seaweed, eroding out of Lower Jurassic rocks on the Yorkshire coast. A human finger points to this ‘witch’s finger’, one of the multitude of folklore names coined for belemnites.
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Matt Friedman @friedmanlab.bsky.social · 15/07/2026
Please join us tomorrow morning at 10 AM eastern for @sanaaelsayed.bsky.social's dissertation defense seminar "Teleost fish evolution in the Cenozoic: New insights from Paleogene ichthyofaunas from the Eastern Desert of Egypt." Message or email me for Zoom passcode: umich.zoom.us/j/98521134857
Slide depicting a set of fishes against a deep blue background. It advertises a talk titled "Teleost fish evolution in the Cenozoic: New insights from Paleogene ichthyofaunas from the Eastern Desert of Egypt" by Sanaa El-Sayed. It lists her affiliations and dissertation committee.
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Iñaki Ruiz-Trillo @multicellgenome.bsky.social · 15/07/2026
Most people have never heard of #apusomonads. Yet these tiny protists occupy an important position in the eukaryotic tree of life. And we know so little about them! We're looking for a Master's student to help uncover their hidden diversity. #ProtistsOnSky 🧵 @ibe-barcelona.bsky.social @prbb.org
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Veeloxxy Bites @the-episiarch.bsky.social · 15/07/2026
I've written a post about Echinomermella matsi, a roundworm which parasitises sea urchins. This worm can castrate or even reduce the lifespan of sea urchins, and this is a story about how these worms turned parasitic over the course of their evolution 🧪 dailyparasite.blogspot.com/2026/07/echi...
dailyparasite.blogspot.com
<i>Echinomermella matsi</i>
Nematodes (roundworms) just can't get enough of being parasites. Parasitism has independently evolved at least fifteen times among nematode...
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Elizabeth Beston @elizabethbeston.bsky.social · 16/07/2026
A few of my favourite darkfield stills from this week’s plankton sample from the pier. A Müller’s larva (Turbellaria), a polychaete trochophore (not sure which stage), and a chain of diatoms Amphitetras antediluviana. #marineplankton 🦑
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The Linnean Society of London @linneansociety.bsky.social · 16/07/2026
New Blog! 📣 There isn't much room for fungi in the fossil record, yet here Isabelle Pola discusses the discovery of one of the oldest ever found! From Cretaceous period sedimentary rock, these fossils help to reshape our understanding of how modern ecosystems developed. buff.ly/3hp1vOd 🧪
buff.ly
In Early Cretaceous Forests: There's Mushroom for Fossils
Discover the latest news from The Linnean Society of London.
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Andrej Spiridonov @andrejpaleo.bsky.social · 16/07/2026
The fossil record of amber really track an "immune system" of plants. The earliest amber from the Middle Devonian of China. www.science.org/doi/10.1126/... 🧪⚒️ #Geology #Paleobio
. Photographs of the Middle Devonian Hujiersite amber. Geological context of the cutinitic coal seam of the APR section of the Hujiersite Formation
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Paul D. Taylor @nhmbryozoa.bsky.social · 13/07/2026
#MolluscMonday Sectioned gastropod in a paving stone from a square in Chartres, west of Paris. @pavementgeology
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Jean-Lou Justine @jean-lou-justine.bsky.social · 19/06/2026
The invasive land flatworm Obama nungara is now in Bulgaria 🧪 biozoojournals.ro/nwjz/content...
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Parasite - The Journal @parasitejournal.bsky.social · 13/07/2026
For #WorldHorseDay a few selected papers on horse parasites: 🧪 [1976] "On Setaria spp. (Nematoda, Filarioidea, Setariidae) from the peritoneal cavity of Equine spp. ..." doi.org/10.1051/para...
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Alexander Lees @alexanderlees.bsky.social · 13/07/2026
Our new commentary rdcu.be/ftx6h in @natecoevo.nature.com written with folks from @inaturalist.bsky.social and @cornellbirds.bsky.social shows that use of AI to manipulate existing or create new wildlife images undermines the huge value of vast citizen science databases. 🌍🪰🪶 #Ornithology 🧵 1/10
rdcu.be
Citizen science platforms must mitigate against the threat of generative AI
Nature Ecology & Evolution - Citizen science platforms must mitigate against the threat of generative AI
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Erick Arrashy Rudianto @erickrudianto.bsky.social · 27/06/2026
The etymology of the epithet 😭
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Schmidt Ocean Institute @schmidtocean.bsky.social · 15/06/2026
This is a deep-sea isopod. Dr. Johanna Weston, a deep-ocean biologist and guest investigator at @whoi.edu, is confident this is Bathyopsurus nybelini, one of her favorite animals. Learn why via the YouTube caption: youtube.com/shorts/DenUj...
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Julian Schrader @julianschrader.bsky.social · 06/05/2026
Great Seminar with Tom Matthews organised by @islandbiology.bsky.social on: Assessing the wider implications of species extinctions: island birds and beyond May 27th, 4pm British Summer Time / 5pm CET Register (it's free) with this link: forms.gle/Cn1wUvukAp2Y...
forms.gle
Alfred Russel Wallace Seminar
Assessing the wider implications of species extinctions: island birds and beyond Tom Matthews University of Birmingham Wednesday, May 27th, 4:00pm BST (British Summer Time) / 5:00pm CEST (Central Eu...
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