Journal of Eukaryotic Microbiology最新文献

Adhaerentella dendrocorona gen. and sp. nov: An Attached Monothalamid Foraminifera From the Abyssal Pacific 来自深海太平洋的一种附着的单壳有孔虫

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2025-10-10 DOI: 10.1111/jeu.70045

Ashley Burkett, Joshua Anadu, Maria Holzmann, Jan Pawlowski, Robert Brandon Pratt, Anthony Rathburn

{"title":"Adhaerentella dendrocorona gen. and sp. nov: An Attached Monothalamid Foraminifera From the Abyssal Pacific","authors":"Ashley Burkett, Joshua Anadu, Maria Holzmann, Jan Pawlowski, Robert Brandon Pratt, Anthony Rathburn","doi":"10.1111/jeu.70045","DOIUrl":"https://doi.org/10.1111/jeu.70045","url":null,"abstract":"<div>\u0000 \u0000 A new genus and species of a monothalamid foraminifera, Adhaerentella dendrocorona, has been identified through phylogenetic and morphological assessment from the Pacific Ocean abyssal plain at Station M, off California. After at least 1 year of colonization time on the seafloor at 4000 m, 141 specimens belonging to the new species were observed attached to plastic substrate deposited on the bottom as a part of the Seafloor Epibenthic Attachment Cube (SEA3) experiments. Adhaerentella dendrocorona is characterized by agglutinated hemispherical tests connected with dendritic tubes. The delicate phyllosilicate branches collapse when not immersed, but embedding in agar or resin facilitates imaging. MicroCT images reveal compositional differences between the agglutinated base and branching tube structures, consisting of phyllosilicates. Despite sharing some morphological similarities with other attached agglutinated genera, such as Capsammina, Crithionina, and Hemisphaerammina, Adhaerentella dendrocorona is genetically different from the latter genera and branches in the monothalamid Clade M. Adhaerentella dendrocorona has a close relationship with undescribed monothalamids from Antarctica, suggesting the possible global distribution of the genus. This study indicates that monothalamid foraminifera are important components of attached abyssal meiofauna, which have evolved morphologies that are likely adapted for suspension feeding in oligotrophic environments that feature hard substrates.\u0000 </div>","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"72 6","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145248455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Database Release: PPSDB, a Linked Open Data Knowledge Base for Protist–Prokaryote Symbioses 数据库发布：PPSDB，一个原生生物-原核生物共生的链接开放数据知识库

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2025-10-10 DOI: 10.1111/jeu.70049

Brandon K. B. Seah

{"title":"Database Release: PPSDB, a Linked Open Data Knowledge Base for Protist–Prokaryote Symbioses","authors":"Brandon K. B. Seah","doi":"10.1111/jeu.70049","DOIUrl":"https://doi.org/10.1111/jeu.70049","url":null,"abstract":"As the ecological and evolutionary importance of symbiotic interactions between protists (microbial eukaryotes) and prokaryotes (bacteria and archaea) is better appreciated, keeping an overview of their diversity and the literature becomes a growing and ongoing challenge. Here I present the Protist-Prokaryote Symbiosis Database (PPSDB), comprising 1146 manually curated interaction statements sourced from 443 publications, where biological taxonomy, anatomical localization, and analytical methods applied have been annotated and mapped to external databases and ontologies, such as Wikidata, NCBI Taxonomy, and Gene Ontology. I describe how its data model deals practically with challenges such as incomplete information and inconsistent taxon concepts, which will be applicable to similar projects. Both the model and underlying Wikibase software platform are highly extensible, so new items and properties can easily be added. Unlike a static table or list of citations, PPSDB is a structured knowledge base that enables programmatic access and powerful, integrated semantic queries. The database is available at https://ppsdb.wikibase.cloud/.","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"72 6","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jeu.70049","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145248457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Expanding the Family Tropidoatractidae: Characterization of Two New Tropidoatractus Species (Armophorea: Metopida) From South Korea Based on Morphology and Molecular Phylogeny 扩大棘足蛙科：韩国两种棘足蛙新种的形态和分子系统发育特征（Armophorea: Metopida）

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2025-10-10 DOI: 10.1111/jeu.70048

Nanda Dwi Kristanti, Novia Cahyani, Quoc Dung Nguyen, Mann Kyoon Shin

{"title":"Expanding the Family Tropidoatractidae: Characterization of Two New Tropidoatractus Species (Armophorea: Metopida) From South Korea Based on Morphology and Molecular Phylogeny","authors":"Nanda Dwi Kristanti, Novia Cahyani, Quoc Dung Nguyen, Mann Kyoon Shin","doi":"10.1111/jeu.70048","DOIUrl":"https://doi.org/10.1111/jeu.70048","url":null,"abstract":"While oxygen is essential for metabolic processes, many ciliate species thrive in low-oxygen or even oxygen-free environments. Anaerobic ciliates have adapted to a broad range of such habitats, yet have long remained understudied compared to their aerobic counterparts. In recent years, however, interest in these lineages has grown, including in the family Tropidoatractidae Rotterová et al. 2018 (Order Metopida), which currently comprises of two genera, Tropidoatractus Levander, 1894 and Palmarella Jankowski, 1975, and five described species. This report presents two novel freshwater species of Tropidoatractidae, identified through a combination of morphological analysis and 18S rRNA gene phylogeny. Tropidoatractus songi n. sp. is identified by its arcuate body and 11–13 oblique rows of cortical granules between ciliary rows. Tropidoatractus rostrum n. sp. possesses an elongated, ellipsoidal body; a prominent, dark, beak-like anterior end to the preoral dome brim; a macronucleus that is closely associated with rod-shaped endosymbiotic prokaryotes; and sparse, irregular cortical granules. Both species exhibit a diplostichomonad paroral membrane. Phylogenetic analyses of the 18S rRNA gene confirm their affiliation with Tropidoatractus, revealing previously unrecognized species diversity among anaerobic freshwater ciliates.","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"72 6","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jeu.70048","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145272390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Underexplored Microbiota of Testate Amoeba in Southeast Asian Ecosystems: A Systematic Review and Meta-Analysis 东南亚生态系统中未开发的遗存变形虫微生物群：系统综述和meta分析。

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2025-09-19 DOI: 10.1111/jeu.70047

Christon Jairus M. Racoma, Leila L. Tomacas, Nikki Heherson A. Dagamac, Yonas Isaak Tekle

{"title":"Underexplored Microbiota of Testate Amoeba in Southeast Asian Ecosystems: A Systematic Review and Meta-Analysis","authors":"Christon Jairus M. Racoma, Leila L. Tomacas, Nikki Heherson A. Dagamac, Yonas Isaak Tekle","doi":"10.1111/jeu.70047","DOIUrl":"10.1111/jeu.70047","url":null,"abstract":"<div>\u0000 \u0000 Single-celled protists, such as testate amoebae, have garnered significant attention as potential bioindicators which translate into their recognition of being ecologically sensitive. They are known for their use in ecological and paleoecological studies, yet their diversity and distribution remain poorly documented in blind spot regions of the Paleotropics. This study systematically consolidates all published species records of testate amoebae, evaluates spatial research bias, and assesses regional richness from Southeast Asian countries. A comprehensive literature search was conducted across digital databases and web-based repositories. In total, there are 497 testate amoebae belonging to 70 genera, including infra-specific species from the 46 studies scoped in this review. Species richness curves revealed steep trajectories in under sampled countries, indicating untapped diversity. Despite geographical proximity, the seeming overlap of species per country was limited, pointing toward predominance of species turnover than nested clustering of richness. This disjunct pattern in species composition suggests the influence of potential ecological specialization or, perhaps, a mere result of uneven research effort in the unexplored regions. The research for testate amoebae has been in a progressive state, yet strong emphasis needs addressing species exploration in response to intensified climate change and degradation of habitats as these would mean potential biodiversity loss.\u0000 </div>","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"72 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145091888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A New Age of Advanced Volume Microscopy for Protists 原生生物先进体积显微镜的新时代。

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2025-09-18 DOI: 10.1111/jeu.70043

Daria Tashyreva, Luca Cirino, Noriko Okamoto, Samuel J. Livingston

引用次数: 0

Cryptic Cryptophytes—Revision of the Genus Goniomonas 隐蔽性隐虫——阴单胞菌属的修订

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2025-09-12 DOI: 10.1111/jeu.70038

Maria Sachs, Frank Nitsche, Hartmut Arndt

{"title":"Cryptic Cryptophytes—Revision of the Genus Goniomonas","authors":"Maria Sachs, Frank Nitsche, Hartmut Arndt","doi":"10.1111/jeu.70038","DOIUrl":"https://doi.org/10.1111/jeu.70038","url":null,"abstract":"Cryptomonad protists are ubiquitously distributed over marine and freshwater habitats. As an exception to the colored cryptomonads, the heterotrophic cryptomonads of the genus Goniomonas have an ancestral phylogenetic position. They lack any kind of chloroplast and most likely represent a basal group to those cryptomonad groups having obtained their chloroplast by secondary endosymbiosis. Earlier studies have shown a deep divergence between freshwater and marine clades of goniomonads that comprise large genetic distances between members within the group and also between the two groups of marine and freshwater taxa. Still, marine and freshwater species carry the same genus name, and to date, only a few species have been described. We therefore restructured goniomonad systematics based not only on a separation of marine and freshwater taxa, but also, taking the large genetic distances into account, on several new genera that are described. Based on morphological as well as phylogenetic data (18S rDNA sequences), this leads to the formation of the freshwater genera Limnogoniomonas n. g., Goniomonas, and Aquagoniomonas n. g. and the marine genera Neptunogoniomonas n. g., Baltigoniomonas n. g., Marigoniomonas n. g., Thalassogoniomonas n. g., Poseidogoniomonas n. g., and Cosmogoniomonas n. g. To give the restructuring process a stable basis, we additionally propose a neotype for Goniomonas truncata.","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"72 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jeu.70038","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145038069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Summer 2025 Editor-In-Chief Message 2025夏季总编留言

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2025-09-02 DOI: 10.1111/jeu.70042

Joel B. Dacks

引用次数: 0

Different Elemental Compositions and Potential Functions of Vacuoles in Bolivina spissa (Foraminifera, Rhizaria) Based on Cryo-SEM-EDS Analyses 基于冷冻扫描电镜-能谱（sem - eds）分析的有孔虫根瘤菌液泡不同元素组成及势功能

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2025-08-31 DOI: 10.1111/jeu.70044

Julien Richirt, Satoshi Okada, Yoshiyuki Ishitani, Nicolaas Glock, Katsuyuki Uematsu, Hidetaka Nomaki

{"title":"Different Elemental Compositions and Potential Functions of Vacuoles in Bolivina spissa (Foraminifera, Rhizaria) Based on Cryo-SEM-EDS Analyses","authors":"Julien Richirt, Satoshi Okada, Yoshiyuki Ishitani, Nicolaas Glock, Katsuyuki Uematsu, Hidetaka Nomaki","doi":"10.1111/jeu.70044","DOIUrl":"https://doi.org/10.1111/jeu.70044","url":null,"abstract":"Benthic Foraminifera exhibit diverse adaptations to low oxygen (O2) environments, including denitrification, a rare trait among eukaryotes. Denitrifying species store intracellular nitrate (NO3−), possibly within vacuoles, and contribute significantly to the global marine nitrogen (N) cycle. Additionally, widespread phosphate (PO43−) accumulation suggests a role in supporting metabolism under O2-depleted conditions. However, the organelles storing NO3− and PO43− remain unknown, limiting the mechanistic understanding of these alternative metabolic pathways. To investigate the intracellular NO3− and PO43− localization in the benthic foraminifera Bolivina spissa, experimental incubations under varying O2 and NO3− conditions followed by cryogenic fixation and scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) analyses were carried out. Most vacuoles were enriched in N relative to the surrounding cytoplasm, likely representing the intracellular NO3− reservoir. The elemental mapping also confirmed phosphorus (P) enrichment in organelles resembling acidocalcisomes, likely as PO43−, which may serve as a readily available energy source used over NO3− storage during the transition between aerobic and anaerobic respiration. Additionally, barium-rich vacuoles of unknown function(s) display a unique spatial distribution. This study emphasizes the effectiveness of cryogenic techniques in elucidating metabolic processes in foraminifers and other large and/or testate unicellular organisms, particularly for studying soluble compounds that have rarely been investigated.","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"72 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jeu.70044","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144923453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Discocelia Plataet Sp. n., a Small Incertae Sedis Cercozoan Flagellate 斑蝶属，一种小型斑蝶科鞭毛动物

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2025-08-25 DOI: 10.1111/jeu.70041

Kristina Prokina, Guifré Torruella, Luis Javier Galindo, Omaya Dudin, Purificación López-García, David Moreira

{"title":"Discocelia Plataet Sp. n., a Small Incertae Sedis Cercozoan Flagellate","authors":"Kristina Prokina, Guifré Torruella, Luis Javier Galindo, Omaya Dudin, Purificación López-García, David Moreira","doi":"10.1111/jeu.70041","DOIUrl":"https://doi.org/10.1111/jeu.70041","url":null,"abstract":"Cercozoa = Filosa (Rhizaria, SAR) is one of the largest rhizarian subgroups and consists of a diverse assemblage of amoeboid and flagellated protists. They are ecologically significant in microbial food webs, widely diverse, and even abundant in soils and deep marine sediments according to environmental sequencing. In spite of this, the cercozoan phylogeny remains poorly resolved by SSU rRNA gene analysis, and omics data are available for only a few well-characterized species. Here, we have sequenced the transcriptomes of three new gliding monadofilosan strains: the glissomonad RAM19S6, the marimonad CRO19P5, and the discocelid GT001. Because of its unusual morphology, we performed a thorough morphological characterization of the strain GT001 using light and electron microscopy and described a new species, Discocelia plataet sp. n. Transmission electron microscopy and expansion microscopy revealed the structure of the flagellar apparatus, allowing us to identify cercozoan microtubular root homologies and supplement our knowledge of the discocelid cell structure with new details. Unique features of the new species are the absence of body tip and velum tip, discoidal mitochondrial cristae, and presence of an acronema on the posterior flagellum. We discuss the phylogenetic position of the three strains within Monadofilosa and the evolutionary context of the order Discocelida.","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"72 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jeu.70041","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Paulinella acadia sp. nov., a New Photosynthetic Species Isolated From a Brackish Beach in British Columbia (Canada) 加拿大不列颠哥伦比亚省咸淡水滩涂上的一种光合作用新种

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2025-08-18 DOI: 10.1111/jeu.70040

Yash Pardasani, Maia V. Palka, Brian S. Leander, Fabien Burki

{"title":"Paulinella acadia sp. nov., a New Photosynthetic Species Isolated From a Brackish Beach in British Columbia (Canada)","authors":"Yash Pardasani, Maia V. Palka, Brian S. Leander, Fabien Burki","doi":"10.1111/jeu.70040","DOIUrl":"https://doi.org/10.1111/jeu.70040","url":null,"abstract":"Plastids in almost all photosynthetic lineages originated from a primary endosymbiosis between cyanobacteria and heterotrophic eukaryotes in an ancestor of Archaeplastida. Strikingly, this event was repeated about a billion years later in an ancestor of photosynthetic Paulinella. Due to the recent and independent occurrence of this second primary endosymbiosis, Paulinella amoebae serve as a remarkable model group for studying the origin of plastids. To date, three species of photosynthetic Paulinella have been described mainly from freshwater and marine environments. Here, we describe a fourth photosynthetic Paulinella species from a brackish beach near Vancouver (British Columbia, Canada) using morphological and molecular data that we named Paulinella acadia sp. nov. Although P. acadia sp. nov. appears similar to P. chromatophora under light microscopy, scanning electron microscopy and molecular phylogenetic analyses demonstrate its close relationship to P. longichromatophora. The discovery of P. acadia sp. nov. expands the diversity and ecological range within this group. Notably, it is the second photosynthetic Paulinella species found on a beach to be described, alongside its sister P. longichromatophora.","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"72 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jeu.70040","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144861901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0