Journal of Eukaryotic Microbiology

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🥳Congratulations to Monica Santin and colleagues for winning the Trager Award for the most cited paper in the past two-year period.
➡️Check out the paper: Division of Blastocystis ST10 into three new subtypes: ST42-ST44
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JEM Spotlight on Parasitology: Journal of Eukaryotic Microbiology Click on the title to browse this issue

We're highlighting some of the best #parasitology papers we've published in the last 5 years. Check out this special collection.
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onlinelibrary.wiley.com/doi/toc/10.1...

Highlighted paper! Daisuke Yamagishi, et al. open a new front in the drive to understand photosymbiosis in protists.

Article➡️ doi.org/10.1111/jeu....

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The marine ciliate Mesodinium rubrum (bottom right) is famed for its ability to steal chloroplasts and nuclei from red cryptophyte algae in the Teleaulax/Gemingera clade. But even these prey specialists can make "mistakes," ingesting blue-green Hemiselmis pacifica (upper left) and transiently retaining their plastids. Here, a M. rubrum cell points its feeding tentacles (labeled with an anti-centrin antibody, yellow) at an H. pacifica cell. The cryptophyte's flagella and ciliate's cilia (labeled with an anti-tubulin antibody, purple) and nuclei (labeled with DAPI, blue) are visible in this expansion micrograph taken with a Nikon spinning disk confocal microscope. Numerous stolen prey nuclei are visible inside of the M. rubrum cell. See Moeller et al. https://doi.org/10.1111/jeu.13066

Check out exciting protist research in JEM! Holly Moeller et al. explore the feeding habits of Mesodinium rubrum and provide a tool for studying its cell biology and photophysiology in their open access paper in our March/April issue!
doi.org/10.1111/jeu....
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Scanning and transmission electron micrographs of Novijibodo darinka n. gen. n. sp.. Ventral view of cell with flagellar pocket, and cross section of cell with nucleus, mitochondrion containing kinetoplast, microtubular prism (enlarged), and endosymbiotic bacteria. Images taken by J. A. Packer. See Packer et al. https://doi.org/10.1111/jeu.13072

We’ve published some incredible protist research in the first quarter of 2025! Julia Packer, et al. describe two new species of free-living bacterivores including the one pictured here Novijibodo darinka. Check out the open access paper from our Jan/Feb issue.
doi.org/10.1111/jeu....
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Algal Symbiont Diversity and Host Fitness Variation in Amoebozoan Photosymbiosis Photosymbioses, the symbiotic relationships between microalgae and non-photosynthetic eukaryotes, are sporadically found in many eukaryotic lineages. Only a few taxa, such as cnidarians and ciliates ....

Algal symbiont diversity and host fitness variation in the amoebozoan photosymbiosis 🦠

by Yamagishi et al.
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onlinelibrary.wiley.com/doi/full/10....

A graphic with letter tiles in the background. A white rectangle across the middle of the graphic includes the word Protist in several languages.

Protistologists work around the world in many languages and alphabets. At JEM, we want to meet you as you see yourself. Now authors can also include their names in any script they want in published papers at JEM. Learn how in our Checklist for Manuscript Preparation: bit.ly/3G3PANH
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Light microscopy images of Divimonas melba n. gen. n. comb. from multieukaryotic culture CuF1Ancy in 150-ppt media.

Cultivation of Ancyromonas melba, and Reclassification as the Type Species of Divimonas gen. nov., a Phylogenetically Important Ancyromonad Lineage
Kate M. Barkhouse, Yana Eglit, Elizabeth J. Weston, Adriana B. A. Jenkins, Alastair G. B. Simpson
onlinelibrary.wiley.com/doi/full/10....
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First Record of Aplanochytrium on the Chilean Coast and its Biotechnological Potential: Expanding the Geographic Distribution of Labyrinthulomycetes This study reports the first record of the genus Aplanochytrium on the coast of Chile, belonging to the class Labyrinthulomycetes in the kingdom Stramenopila. These marine protists play an essential ...

First published paper! I'm thrilled to be a co-author of this work by Jara-Zapata et al., which reports for the first time the presence of the genus Aplanochytrium on the Chilean coast, expanding its geographical distribution 1/2
doi.org/10.1111/jeu....

Light and scanning electron micrographs (SEM) of Urceolaria clepsydra n. sp. found in sea cucumbers.

Morphology and Molecular Phylogeny of Endosymbiotic Ciliates (Peritrichia, Mobilida) of Marine Invertebrates with Descriptions of Two Novel Species Urceolaria clepsydra n. sp. and Urceolaria bratalia n. sp.

Gabrielle Martinez, et al.

onlinelibrary.wiley.com/doi/full/10....
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Orciraptor agilis (strain OrcA03) feeding on different zygnematophytes

Broad-range necrophytophagy in the flagellate Orciraptor agilis (Viridiraptoridae, Cercozoa) and the underappreciated role of scavenging among protists

Jannika Moye, Sebastian Hess

onlinelibrary.wiley.com/doi/10.1111/...
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(A) Chemical structures of proteasome inhibitors including ixazomib, ixazomib citrate and oprozomib (B) Assessment of in vitro dose responses of protease inhibitors against Babesia duncani

Effect of protease inhibitors on the intraerythrocytic development of Babesia microti and Babesia duncani, the causative agents of human babesiosis

Temitope Aderanti, Jordan M. Marshall, Jose Thekkiniath

onlinelibrary.wiley.com/doi/10.1111/...

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Morphology of Allobodo yubaba n. sp.

Characterization of Allobodo yubaba sp. nov. and Novijibodo darinka gen. et sp. nov., cultivable free-living species of the phylogenetically enigmatic kinetoplastid taxon Allobodonidae
Julia A. Packer et al.
onlinelibrary.wiley.com/doi/10.1111/...

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🚨 New paper! Pathogenicity and phylogeny of Labyrinthula spp. isolated in Washington and Oregon, USA - pathogenic isolates could be identified as L. zosterae, while nonpathogenic isolates did not form a clade with any previously identified SSU ribotypes 🧪onlinelibrary.wiley.com/doi/10.1111/je…

Schematic illustration of cryptic diversity in a ciliate species, in which several distinct dominant haplotypes (showing also intra-clonal diversity) are hidden behind one morphotype, and a ‘complex ciliate species’ comprising intra-clonal diversity within only one dominant haplotype.

The planktonic freshwater ciliate Balanion planctonicum (Ciliophora, Prostomatea): A cryptic species complex or a “complex species”?
Martina Schalch-Schuler, et al.
onlinelibrary.wiley.com/doi/10.1111/...

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LSU rDNA phylogenetic analysis by maximum likelihood method showing the relationship between Togula jolla NIES 405 (in bold) and other Togula spp. strains.

Production of amphisterol and other Δ8(14) sterols by Togula jolla (formerly Amphidinium sensu lato) overlaps chemotaxonomically with Amphidinium carterae |
Braedyn E. Hollingsworth, Catharina Alves-de-Souza, Jeffrey D. Leblond
onlinelibrary.wiley.com/doi/full/10....
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Localization of HCN1-GFP in Paramecium tetraurelia.

HCN channels are essential for the escape response of Paramecium
Daisuke Kandabashi, Mutsumi Kawano, Shinobu Izutani, Hiyori Harada, Takashi Tominaga, Manabu Hori
onlinelibrary.wiley.com/doi/10.1111/...
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Detection of the PTORS gene from genomic DNA of various Entamoeba nuttalli strains.

Remarkable genetic variability and high antigenicity of the octapeptide-repeat region in an Entamoeba nuttalli-specific surface protein
Tatsuya Imai, Azumi Kakino, Akitomo Sugawara, Xunjia Cheng, Hiroshi Tachibana
onlinelibrary.wiley.com/doi/10.1111/...
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Microscopic images and depictions of Oxytoxum lohmannii (SPMC98).

Morphology, behavior, and phylogenomics of Oxytoxum lohmannii, Dinoflagellata
Elizabeth C. Cooney, et al.
onlinelibrary.wiley.com/doi/10.1111/...
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Photomicrographs of Eimeria magna oocysts

Morphological and molecular characterization of Eimeria magna infecting local rabbit (Oryctolagus cuniculus) in Alkarg City, Saudi Arabia
Mutee Murshed, et al.
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onlinelibrary.wiley.com/doi/10.1111/...

Functional stress responses in Glaucophyta: Evidence of ethylene and abscisic acid functions in Cyanophora paradoxa
Baptiste Genot et al.
onlinelibrary.wiley.com/doi/10.1111/...
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Congratulations to JEM Associate Editor Elisabeth Hehenberger on receiving an ERC Consolidator grant.
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Interested in #polar #algae and their #predators? In this small paper we describe a novel genus of amoebae preying on #diatoms! Interestingly, the 18S sequence of #arctic and #antarctic isolates is completely identical. Meet Katarium polorum! doi.org/10.1111/jeu.... #protistsonsky

🚨 New Issue Alert 🚨
On the cover: SEM of a marine gregarine apicomplexan parasite, Amplectina cordis n. gen. et n.sp., showing two gamonts in sygyzy. (See Park & Leander. doi.org/10.1111/jeu....)