Journal of Eukaryotic Microbiology
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Journal of Eukaryotic Microbiology
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The Journal of Eukaryotic Microbiology, the journal of the International Society of Protistologists, publishes original research on all aspects of #protists.
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🔎Check out this image from one of the articles in our Sept/Oct issue:
🔬Two Nanochloropsis gaditana cells visualized by quick-freeze deep-etch electron
▶️Read the article: Goodenough & Roth. Ultrastructure of the Endoplasmic Reticulum in Eukaryotic Microalgae. doi.org/10.1111/jeu....
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Two Nanochloropsis gaditana cells visualized by quick-freeze deep-etch electron microscopy. Left cell displays a chloroplast containing thylakoids, a nucleus, a mitochondrion, and a fracture face of the plasma membrane. In the right cell, the innermost membrane, marked with pits, is the fractured outer membrane of the chloroplast envelope, above which is the fractured outer membrane of the chloroplast ER, above which is the granular cell wall.
October 15, 2025 at 4:13 PM
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The microscopic world is full of surprises! This stunning image captured through SEM reveals the parasite Cyrilia lignieresi living inside a red blood cell of the freshwater fish Synbranchus marmoratus. A rare snapshot of the complexity of life invisible to the naked eye. doi.org/10.1111/jeu....
August 12, 2025 at 11:52 AM
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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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June 5, 2025 at 5:49 PM
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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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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
May 8, 2025 at 12:00 PM
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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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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
May 7, 2025 at 5:30 PM
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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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A graphic with letter tiles in the background. A white rectangle across the middle of the graphic includes the word Protist in several languages.
April 10, 2025 at 5:46 PM
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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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Light microscopy images of Divimonas melba n. gen. n. comb. from multieukaryotic culture CuF1Ancy in 150-ppt media.
March 19, 2025 at 5:44 PM
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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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Light and scanning electron micrographs (SEM) of Urceolaria clepsydra n. sp. found in sea cucumbers.
February 24, 2025 at 12:39 PM
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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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Orciraptor agilis (strain OrcA03) feeding on different zygnematophytes
February 20, 2025 at 5:43 PM
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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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(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
February 19, 2025 at 5:12 PM
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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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Morphology of Allobodo yubaba n. sp.
January 29, 2025 at 6:47 PM
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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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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.
January 27, 2025 at 5:22 PM
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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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LSU rDNA phylogenetic analysis by maximum likelihood method showing the relationship between Togula jolla NIES 405 (in bold) and other Togula spp. strains.
January 24, 2025 at 5:41 PM
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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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Localization of HCN1-GFP in Paramecium tetraurelia.
December 11, 2024 at 6:47 PM
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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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Detection of the PTORS gene from genomic DNA of various Entamoeba nuttalli strains.
December 10, 2024 at 5:43 PM
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Morphology, behavior, and phylogenomics of Oxytoxum lohmannii, Dinoflagellata
Elizabeth C. Cooney, et al.
onlinelibrary.wiley.com/doi/10.1111/...
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Microscopic images and depictions of Oxytoxum lohmannii (SPMC98).
December 9, 2024 at 5:40 PM
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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/...
Photomicrographs of Eimeria magna oocysts
December 6, 2024 at 6:56 PM
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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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December 5, 2024 at 6:10 PM
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🚨 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....)
December 2, 2024 at 5:19 PM