Erick Arrashy Rudianto

Top: A young Pacific bluefin tuna Centre: The opened body cavity of a young bluefin showing the internal organs and a pink fluke. Bottom: Two photos of a Hirudinella fluke, contracted (left) and extended (right),

Hirudinella is a genus of stomach flukes which are usually associated with the Wahoo. But species in this genus can be found in a wide range of pelagic fishes, including the Pacific bluefin tuna 🧪
#Invertebrate
www.researchgate.net/publication/...

My friend who is studying in Germany gifted me this book. Thank you 🥺

<i>Forficuloecus pezopori</i> Parasites are a major part of biodiversity, but they spend most of their time hidden in plain sight. Even with some animals that have been k...

Crouching Parrot, Hidden Louse:
The Kyloring (Pezoporus flaviventris) is a critically endangered species of Australian parrot, and it is host to Forficuloecus pezopori - a species of louse which lives only on the Kyloring and nowhere else.
#Invertebrate 🧪
dailyparasite.blogspot.com/2024/06/forf...

A Mister Twister Curly Tail Grub soft plastic fishing lure in chartreuse with red speckles

Composite micrograph showing the sequence of movement of a single detached Siedleckia nematoides parasite, shown as three separate individuals. From Fig. 1H of the paper: Valigurova, A., Vaškovicová, N., Diakin, A., Paskerova, G. G., Simdyanov, T. G., & Kováčiková, M. (2017). Motility in blastogregarines (Apicomplexa): Native and drug-induced organisation of Siedleckia nematoides cytoskeletal elements. PLoS One, 12(6), e0179709. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0179709

There's a species of apicomplexan parasite called Siedleckia nematoides which looks like microscopic version of those soft plastic grub fishing lure🧪
journals.plos.org/plosone/arti...

This is my first time seeing alive lernanthropid copepod (possibly Lernanthropus latis)!

Some little circus performers. #protistsonsky

#MolluscMonday Photographed at Hampton Court Palace last week, orthocone nautiloids in paving slabs of Swedish Ordovician limestone. A microfault crosses the chambered phragmocone of one. The other fossil may represent a siphuncular structure but comments would be welcomed.

Some parasitic copepods and a gnathiid isopod that I found during fieldwork in Alor.

Transit in Kupang

Gambir train station at night. The Monumen Nasional could be seen at the background on left top

Stasiun Gambir

#WormWednesday
Two digeneans recovered from the GI-tract of a sciaenid host.

A new addition to my collection 👀

Looking forward to see that pictures Dr Johnson!

A dense accumulation of fossil belemnite rostra (including also some encrusting bivalves) from the Pliensbachian-Toarcian GSSP of Peniche Portugal (see https://doi.org/10.1098/rsos.190494).

Talking about another true #invertefest: belemnite "battlefields" or "Schlachtfelder". Despite the name, they are generally used to refer to dense accumulations of #fossil #cephalopod rostra, which can be formed under various mechanisms. Irrespectively, they are a great way to obtain large samples.

Now, I am wondering about their parasites too...

#FossilFriday. Silurian tabulate coral Heliolites. From the cutting room floor of 'Fossils. The Essential Guide’, which used a lower magnification image of the same fossil.

simple models of various microbial cells with diverse configurations of flagella

New #ISEPpapers! The fluid dynamics and functional diversity of the flagella of free-living flagellates orbit.dtu.dk/en/publicati...

#Protists #Microbes #FluidDynamics #Biophysics

Top: Illustration of a Myllokunmingia with a speculative ancestor of branchiurans attached to its flank. Bottom: Illustration of a Yunnanozoon with a pentastomid attached to its gill opening

Ichthyostracan Origins
#Invertebrate #SciArt #PalaeoArt

A flyer for the next edition of the Palaeoverse Lecture Series, featuring a cartoon of an open laptop with the Palaeoverse logo on the back, and a picture of Amy Shipley, wearing a denim jacket and with sunglasses on her head, smiling into the camera

🚨Palaeoverse Lecture Series🚨
🗓️28th August 2025, 15:00 UTC🗓️

Join us for next week’s talk given by @sauropodlets.bsky.social from the University of Leeds, on “Modelling ancient food webs: ecosystem changes across the Pliocene marine megafaunal extinction” 🦈

Register here: bit.ly/palaeoverse-...

True, but maybe hard to design, hence the chemical shells aren't realistic 🤣

As someone who previously played War Thunder, the fridge magnets tempt me aggh

<i>Anelasma squalicola</i> (revisited) A few months ago I wrote a Dispatch   for Current Biology about a newly published study on Anelasma squalicola  - a parasitic barnacle that...

The shark-sucker barnacle - Anelasma squalicola - is a barnacle with an unusual habit.

Instead of filter feeding on plankton, it has evolved to parasitise deep sea squaloid sharks such as lantern sharks and Greenland shark 🦈
#Invertebrate 🧪
dailyparasite.blogspot.com/2014/09/anel...

This is such a cool project!

Evolutionary Transitions of Parasites between Freshwater and Marine Environments Abstract. Evolutionary transitions of organisms between environments have long fascinated biologists, but attention has been focused almost exclusively on

Our study explores how #parasite traits, life #cycles, and #host relationships shape shifts between #marine and #freshwater habitats: doi.org/10.1093/icb/...

<i>Myxobolus medusae</i> Myxozoans  are a group of single-celled parasites which had evolved from jellyfish-like ancestors, thus making them a type of single-celled ...

I've written a post about Myxobolus medusae - a myxozoan parasite that lives in the eyes of red-bellied piranhas.

Beauty might be in the eye of the beholder, but this microscopic medusa is in the eye of a piranha
#Invertebrate 🧪
dailyparasite.blogspot.com/2025/08/myxo...

Screenshot from the anime Ruri Rocks. Nagisa sitting at her workstation while talking to Ruri who is standing in front of her, holding a newly published scientific paper.

Screenshot from the anime Ruri Rocks. A tray holding various rocks and a box of Kimwipes

Screenshot from the anime Ruri Rocks. Corner of a desk with stacks of haphazardly arranged piles of books and scientific papers on and next to it, along with a backpack leaning against it all.

I have to hand it to Ruri Rocks for nailing how a grad student's workstation looks like

A hatching honeyguide with the hooked tip of its beak visible through the crack in the eggshell. From this paper: https://royalsocietypublishing.org/doi/10.1098/rsbl.2011.0739

A honeyguide chick with three recently killed little bee-eater hatchling that it just killed. From: https://royalsocietypublishing.org/doi/10.1098/rsbl.2011.0739

Honeyguides are natural-born killers - like cuckoos, they are brood parasites, and the first thing going through the mind of a honeyguide chick when it hatches from its egg is:
MURDER
royalsocietypublishing.org/doi/10.1098/...
🧪

Cereal Guy meme. Top panel is the Cereal Guy, indicated to be T. Cavalier-Smith, saying "Cnidarians would never become single-celled" and a section from the paper: Cavalier-Smith, T. (1993). Kingdom protozoa and its 18 phyla. Microbiological reviews, 57(4), 953-994. Which reads: "Phylum Myxosporidia The myxosporidian polar capsule suggests a possible affinity with Dinozoa, but an apicomplexan, opalozoan, or even rhizopod ancestry is each a reasonable possibility. In my view, an origin of myxosporidia from Cnidaria, some times mooted (91), involves far too great a degree of parasitic reduction to be contemplated seriously, so myxosporidia should remain firmly in the kingdom Protozoa (which is not here restricted to unicellular organisms) and not be transferred to the Animalia, which also are defined not by pluricellularity but by the presence of a triploblastic collagenous somatic structure (31)". Bottom panel is Cereal Guy spitting out cereal, accompanied by the first page of the paper: Adriano, E. A., Zatti, S. A., & Okamura, B. (2022). How to build single‐celled cnidarians with worm‐like motility: Lessons from Myxozoa. Journal of Anatomy, 240(3), 475-488.

From a lecture I'm currently writing about the history of #Invertebrate taxonomy.

Those myxozoans do be tricky 🧪

An image of the microscopic radiolarian Plagiacantha arachnoides from the gulf of Maine. It is largely absent from the water column except during the period Late July-Mid October.

Hello my friend, good to see you again. You are right on time (according to my ~4 years of monitoring data). #protistsonsky #radiolaria

That's me there 😂