Journal of Eukaryotic Microbiology最新文献_第2页

Learning Without Neurons: A Review of Associative Memory in Protists 无神经元学习：原生动物联想记忆研究进展。

IF 3.3 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2026-09-15 DOI: 10.1111/jeu.70120

Yashika Jorwal

{"title":"Learning Without Neurons: A Review of Associative Memory in Protists","authors":"Yashika Jorwal","doi":"10.1111/jeu.70120","DOIUrl":"10.1111/jeu.70120","url":null,"abstract":"<div>\u0000 \u0000 For decades, the capacity for associative learning was considered a hallmark of multicellular organisms possessing complex nervous systems. However, a growing body of evidence in the field of basal cognition is challenging this neuro-centric paradigm, demonstrating that unicellular eukaryotes, or protozoans, exhibit sophisticated behavioral plasticity. This review synthesizes historical and contemporary research into associative learning—specifically classical and operant conditioning—in prominent protozoan models such as Paramecium, Stentor, and the acellular slime mold Physarum polycephalum. We examine the experimental frameworks that have successfully demonstrated anticipatory behavior and stimulus–response pairing, while critically addressing the methodological skepticism that has historically clouded the field. Furthermore, we explore the hypothesized subcellular mechanisms driving these processes, including cytoskeletal restructuring, epigenetic modifications, and biochemical signaling cascades that serve as a non-neural “memory.” By reevaluating the cognitive boundaries of the single cell, this paper argues that learning is a fundamental property of biological systems rather than a specialized function of neural tissue. The findings discussed herein have significant implications for our understanding of the evolution of intelligence, the development of synthetic biological systems, and the broadening definition of biological memory.\u0000 </div>","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"73 5","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148968925","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

Non-Fungi Diversity Present in Soil and Snow Impacted by Anthropogenic Activity in King George Island, Maritime Antarctica Using Metabarcoding Approach 基于元条形码方法的南极海洋乔治王岛土壤和积雪非真菌多样性研究

IF 3.3 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2026-09-11 DOI: 10.1111/jeu.70122

Fábio Leal Viana Bones, Carlos Henrique Russi, Fabyano Alvares Cardoso Lopes, Micheline Carvalho-Silva, Peter Convey, Luiz Henrique Rosa, Paulo Eduardo Aguiar Saraiva Câmara

{"title":"Non-Fungi Diversity Present in Soil and Snow Impacted by Anthropogenic Activity in King George Island, Maritime Antarctica Using Metabarcoding Approach","authors":"Fábio Leal Viana Bones, Carlos Henrique Russi, Fabyano Alvares Cardoso Lopes, Micheline Carvalho-Silva, Peter Convey, Luiz Henrique Rosa, Paulo Eduardo Aguiar Saraiva Câmara","doi":"10.1111/jeu.70122","DOIUrl":"https://doi.org/10.1111/jeu.70122","url":null,"abstract":"The Antarctic Peninsula shows a fast-rising temperature trend, increasing the risk of colonization by non-native species, such as the invasive Poa annua. The “cryptic diversity” of largely unknown microscopic propagules in soil and snow poses a significant threat, as traditional morphological surveys are inadequate. Therefore, DNA metabarcoding of environmental DNA was applied to achieve a broader and more accurate assessment. We investigated non-fungi eDNA diversity in soil (three sites) and freshly deposited snow (five sites) from Martel Inlet, King George Island, with sites categorized by proximity to human activity. DNA was extracted, and the internal transcribed spacer 2 (ITS2) was used as the DNA barcode. Sequencing was performed using an Illumina MiSeq V3. Sequences were classified into 72 ASVs, representing four kingdoms and 10 phyla, with 18% not previously recorded in Antarctica. Soils hosted richer communities (mean of 30 ASVs per sample) than snow (mean of 16.2 ASVs per sample); however, there was no statistically significant difference in abundance nor diversity between the sample types. The data did not reveal differences between the sampled areas or suggest anthropogenic influence on any of the sampled communities. This work underscores the value of eDNA metabarcoding in assessing cryptic biodiversity.","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"73 5","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jeu.70122","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148943284","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

The Glow Up: Optimizing Growth Conditions and Carotenoid Profiling in Euglena gracilis 发光：优化生长条件和类胡萝卜素谱在细叶菊

IF 3.3 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2026-09-11 DOI: 10.1111/jeu.70124

Oskar Fields, Elsie Cunliffe, Ellis C. O'Neill

{"title":"The Glow Up: Optimizing Growth Conditions and Carotenoid Profiling in Euglena gracilis","authors":"Oskar Fields, Elsie Cunliffe, Ellis C. O'Neill","doi":"10.1111/jeu.70124","DOIUrl":"https://doi.org/10.1111/jeu.70124","url":null,"abstract":"<div>\u0000 \u0000 Until now, only five photoactive pigments have been identified in Euglena gracilis and there has been contradictory reporting of the major carotenoid. The impact of various environmental factors on the carotenoid content of E. gracilis has not been well studied. Using an improved HPLC UV–VIS method, combined with mass spectrometry, we have now identified 12 photoactive pigments from E. gracilis extracts and confirmed diadinoxanthin as the major carotenoid produced in E. gracilis. After testing cultivation media and major carbon sources (addition of glucose—2–20 g/L, ethanol—0.2%–2.0% w/v), we found that EG: JM with 0.8% ethanol increased diadinoxanthin relative production by 361% (4.29 mg/L) when compared to standard cultivation (EG media, 24 h light, PPFD 25.9 μmol/m2/s and 25°C). This investigation also tested a range of light intensities (PPFD 0–41.7 μmol/m2/s) and found that increasing light intensity (PPFD to 41.7 μmol/m2/s) increased diadinoxanthin production by a further 36% (5.82 mg/L), giving an increase of 489% over the standard cultivation conditions.\u0000 </div>","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"73 5","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148943283","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

Different Transcriptomic Responses After Moderate and Severe Heat Shock in Trypanosoma cruzi Epimastigotes 克氏锥虫中、重度热休克后转录组反应的差异。

IF 3.3 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2026-09-09 DOI: 10.1111/jeu.70125

Thayane Bottaro, Luciana L. Penha, Rosane Silva, Turán P. Ürményi

{"title":"Different Transcriptomic Responses After Moderate and Severe Heat Shock in Trypanosoma cruzi Epimastigotes","authors":"Thayane Bottaro, Luciana L. Penha, Rosane Silva, Turán P. Ürményi","doi":"10.1111/jeu.70125","DOIUrl":"10.1111/jeu.70125","url":null,"abstract":"Trypanosoma cruzi undergoes heat stress during its life cycle. In this study, we performed a transcriptomic analysis of the heat shock response in epimastigotes from different T. cruzi strains. In both clone CL Brener and the Y strain, very few to no statistically significant variations were observed in the transcriptome at 37°C, whereas differentially expressed genes were observed at 40°C, with 1018 upregulated and 734 downregulated transcripts in CL Brener and 1426 upregulated and 1223 downregulated transcripts in the Y strain. Upregulated transcripts were enriched in catabolic pathways, whereas downregulated transcripts were enriched in catabolic and anabolic pathways. In addition, the expression pattern of different members of several heat shock protein gene families varied. The expression patterns of members of surface protein gene families, such as trans-sialidases, GP63, mucins, and mucin-associated proteins, also varied, although the physiological significance of these patterns remains unclear. We conclude that, in T. cruzi epimastigotes, transcriptome modulation at 37°C was less pronounced than expected for an 8°C increase in temperature, whereas at 40°C, there was functional enrichment in both induced and repressed transcripts, characterizing a classical response to severe heat shock.","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"73 5","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jeu.70125","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148919996","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

A Pan-European Whole-Microbiome Study of Wastewater Influent: Prokaryotes, Protists, Fungi, and Metazoa 泛欧污水全微生物组研究：原核生物、原生生物、真菌和后生动物。

IF 3.3 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2026-09-04 DOI: 10.1111/jeu.70112

Niklas Nett, Kenneth Dumack

{"title":"A Pan-European Whole-Microbiome Study of Wastewater Influent: Prokaryotes, Protists, Fungi, and Metazoa","authors":"Niklas Nett, Kenneth Dumack","doi":"10.1111/jeu.70112","DOIUrl":"10.1111/jeu.70112","url":null,"abstract":"Microbial communities entering wastewater treatment plants (WWTPs) through untreated sewage represent an important interface between human, environmental, and treatment-associated microbiomes, yet our understanding of their biogeography remains poorly resolved, particularly for microbial eukaryotes. Using shotgun metagenomic time-series data from influent samples of seven WWTPs across a European latitudinal gradient, we analyzed the taxonomic composition and dynamics of bacteria, protists, fungi, and microscopic metazoa. Influent community composition varied with geographic location and season, with a pronounced north–south divergence driven by dominant taxa and stronger seasonal shifts observed at higher latitudes. Cross-domain associations were pervasive, suggesting that co-varying bacterial and eukaryotic components structure the incoming microbial pool. Our findings provide a pan-European baseline for whole-microbiome wastewater surveillance and highlight that influent communities differ regionally and seasonally. These patterns may be relevant for downstream treatment-stage microbiomes, but direct effects on reactor community assembly and treatment performance require targeted sampling across treatment stages.","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"73 5","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13543059/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148891769","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

Freshwater Haplosporidian Diversity Associated With Invasive Non-Native Bivalves in the River Thames, Including Haplosporidium raabei Infecting Dreissena polymorpha 与入侵的非本地双壳类相关的泰晤士河淡水单倍孢子虫多样性，包括感染多形德雷氏单倍孢子虫。

IF 3.3 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2026-09-01 DOI: 10.1111/jeu.70117

Rachel Foster, Georgia M. Ward, Kelly S. Bateman, Paul F. Clark, Matthew J. Green, David Morritt, Paul Stebbing, David Bass

{"title":"Freshwater Haplosporidian Diversity Associated With Invasive Non-Native Bivalves in the River Thames, Including Haplosporidium raabei Infecting Dreissena polymorpha","authors":"Rachel Foster, Georgia M. Ward, Kelly S. Bateman, Paul F. Clark, Matthew J. Green, David Morritt, Paul Stebbing, David Bass","doi":"10.1111/jeu.70117","DOIUrl":"10.1111/jeu.70117","url":null,"abstract":"Haplosporidians are protistan parasites of aquatic invertebrates. Described here is the first report of the zebra mussel (Dreissena polymorpha) parasite Haplosporidium raabei in the River Thames, London, UK. The prevalence of this protist in the upper tidal Thames, Richmond, was higher than previously reported in other studies from the UK and mainland Europe of infected D. polymorpha populations, with molecular detection of H. raabei DNA in all D. polymorpha specimens collected. Also reported is the molecular detection (DNA and RNA) of H. raabei in other invasive Thames bivalves: the Asian clam (Corbicula fluminea) and quagga mussel (Dreissena bugensis). The molecular sequence of a closely related, but genetically distinct H. raabei-like sequence associated with D. polymorpha is also reported. Two new PCR assays are presented for the specific and sensitive detection of H. raabei and H. raabei-like sequences, enabling independent screening of these two lineages and also confirming the molecular presence of H. raabei in native unionid mussel species. A diversity of novel haplosporidian lineages associated with other invasive bivalves C. fluminea and D. bugensis and associated eDNA from the River Thames is also reported, demonstrating haplosporidian diversity associated with freshwater bivalves that is yet to be explored.","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"73 5","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13535272/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148874436","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

Understanding the Evolution and Clade Diversity of Mayorella (Amoebozoa): Description of a Novel Species From Freshwater Near Cape Coast, Ghana 了解Mayorella（变形虫）的进化和分支多样性：来自加纳海岸角附近淡水的一个新物种的描述。

IF 3.3 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2026-08-24 DOI: 10.1111/jeu.70118

Yonas I. Tekle, Saron Ghebrezadik, Christon Jairus M. Racoma, Angelicia A. Greer, Kwaku Oti Acheampong, Kwaku Brako Dakwa

{"title":"Understanding the Evolution and Clade Diversity of Mayorella (Amoebozoa): Description of a Novel Species From Freshwater Near Cape Coast, Ghana","authors":"Yonas I. Tekle, Saron Ghebrezadik, Christon Jairus M. Racoma, Angelicia A. Greer, Kwaku Oti Acheampong, Kwaku Brako Dakwa","doi":"10.1111/jeu.70118","DOIUrl":"10.1111/jeu.70118","url":null,"abstract":"<div>\u0000 \u0000 Mayorella species are globally distributed amoeboid protists, yet their diversity remains poorly resolved because of pronounced morphological plasticity and limited molecular data. Freshwater ecosystems of West Africa remain particularly underexplored, with virtually no integrative taxonomic or molecular studies addressing Mayorella and broader microbial eukaryotic diversity. Here, we describe Mayorella budamensis sp. nov. isolated from Budamu Stream, Ghana, using an integrative approach combining live-cell morphology and SSU rDNA phylogenetic analyses. The new species exhibits extensive morphological variation in cell size, shape, locomotion, and floating forms. Phylogenetic analyses place it within a well-supported lineage clustering with geographically diverse but largely unnamed and uncultured lineages. Comparative sequence analyses indicate that M. budamensis is genetically distinct from currently available congeners. A second Mayorella isolate recovered from the same locality, known only from single-cell-derived molecular data, represents an additional evolutionary lineage lacking a cultured isolate and currently associated primarily with environmental sequences. Expanded phylogenetic reconstruction identified up to seven putative clades, most containing unnamed or environmental taxa, revealing substantial cryptic diversity. These findings expand the known geographic and evolutionary diversity of Mayorella in African freshwater ecosystems and provide a provisional framework for future taxonomic and phylogenomic studies.\u0000 </div>","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"73 5","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148808719","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

Exploration of Overlooked Aduncodinium-Like (Pfiesteriaceae, Dinophyceae) Diversity 被忽视的Aduncodinium-Like （Pfiesteriaceae, Dinophyceae）多样性的探索

IF 3.3 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2026-08-21 DOI: 10.1111/jeu.70116

Albert Reñé, Aika Yamaguchi, Takeo Horiguchi, Kunihiko Watanabe, Mona Hoppenrath

{"title":"Exploration of Overlooked Aduncodinium-Like (Pfiesteriaceae, Dinophyceae) Diversity","authors":"Albert Reñé, Aika Yamaguchi, Takeo Horiguchi, Kunihiko Watanabe, Mona Hoppenrath","doi":"10.1111/jeu.70116","DOIUrl":"https://doi.org/10.1111/jeu.70116","url":null,"abstract":"The dinoflagellate genus Aduncodinium was erected to encompass Katodinium glandula, belonging to the family Pfiesteriaceae. Other described species, like K. asymmetricum, show Aduncodinium-like characters and probably belong to this genus. These two species are commonly reported in the literature. However, detailed morphological characterization of observed specimens is rarely provided mostly due to difficulties in culturing and studying these thin-walled dinoflagellates. Likewise, molecular information for Aduncodinium-like species is scarce. In this study, we provide a morpho-molecular characterization of Aduncodinium-like morphospecies mostly detected in coastal sediments from Spain, Germany, Japan, and Canada. The information collected and the detections reported in the literature, mostly referring to K. glandula or K. asymmetricum, highlight the existence of a largely overlooked diversity of Aduncodinium-like taxa, and the existence of cryptic diversity in some morphospecies. In fact, up to 16 different morphospecies are reported in this study, some of them supported by their molecular information, which can be assigned to different morphogroups. The information collected results in the description of the new species Aduncodinium robustum sp. nov.","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"73 5","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jeu.70116","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784487","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

Widespread Association of Ciliates Colonizing Gills of Shrimps Inhabiting Vents and Seeps Across the Pacific Ocean 栖息在太平洋通风口和渗漏处的虾鳃上的广泛的纤毛虫协会

IF 3.3 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2026-08-17 DOI: 10.1111/jeu.70115

Lison Hey, Chong Chen, Ting Xu, Emily Cowell, Dewi Langlet, Pierre Methou

{"title":"Widespread Association of Ciliates Colonizing Gills of Shrimps Inhabiting Vents and Seeps Across the Pacific Ocean","authors":"Lison Hey, Chong Chen, Ting Xu, Emily Cowell, Dewi Langlet, Pierre Methou","doi":"10.1111/jeu.70115","DOIUrl":"https://doi.org/10.1111/jeu.70115","url":null,"abstract":"Bacterial symbiosis is well-documented in chemosynthesis-based ecosystems, but associations with microeukaryotes remain overlooked. In this study, using scanning electron microscopy and 18S rDNA barcoding, we investigate the presence, diversity, and biogeographic patterns of ciliate epibionts associated with two deep-sea caridean families: Alvinocarididae and Thoridae. We identified a widespread lineage of ciliates colonizing the gills of different alvinocaridid species, extending their previously known distribution in freshwater and coastal habitats to deep ocean down to 3388 m. These ciliates form a distinct clade related to coastal Chonotrichia, but show clear genetic divergence from the previously described species. Geographic divergence of these ciliate populations was observed across the Pacific Ocean, with no evident structure related to their host species. These chonotrichian ciliates exhibited variation in occurrence across host species, individuals, and regions, indicating a facultative association with their hosts. In contrast, the thorid shrimps harbored rare and phylogenetically diverse ciliates. More rarely, we found ciliates related to known parasitic lineages hosted by both shrimp families, with signs of immune response (black gills) in some individuals colonized by these ciliates. Our results reveal previously overlooked protist-crustacean associations in chemosynthetic ecosystems and highlight the ecological and biogeographic importance of this group in the deep ocean.","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"73 5","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jeu.70115","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784119","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

Polyphyly and Deep Evolutionary History of Piscine Coccidia: Mitochondrial Genomics of a New Goussia Species From Pacific Saury (Cololabis saira) 鱼类球虫的多源性和深层进化史：太平洋刀鱼（Cololabis saira）一种新的球虫种的线粒体基因组学。

IF 3.3 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2026-08-12 DOI: 10.1111/jeu.70114

Peihang Hong, Toshihiro Tokiwa, Sijia Yu, Shyun Chou

{"title":"Polyphyly and Deep Evolutionary History of Piscine Coccidia: Mitochondrial Genomics of a New Goussia Species From Pacific Saury (Cololabis saira)","authors":"Peihang Hong, Toshihiro Tokiwa, Sijia Yu, Shyun Chou","doi":"10.1111/jeu.70114","DOIUrl":"10.1111/jeu.70114","url":null,"abstract":"<div>\u0000 \u0000 The genus Goussia Labbé 1896 represents a polyphyletic assemblage of piscine coccidia whose systematics remain poorly resolved due to morphological convergence and limited genomic data. Here we describe Goussia sairae n. sp. from the liver of Pacific saury (Cololabis saira) in the Northwestern Pacific, characterized through integrated morphological, histopathological, and molecular analyses. Long-read amplicon sequencing of single-oocyst isolates enabled the first complete mitochondrial genome assembly for a marine Goussia species, revealing two co-existing mitogenome genotypes (99.3% identity) within individual oocysts—the first robust evidence consistent with intra-oocyst mitochondrial heterogeneity in the Eimeriidae. Phylogenetic reconstructions based on nuclear 18S ribosomal RNA and concatenated mitochondrial protein-coding genes robustly supported the polyphyly of Goussia sensu lato, recovering five major lineages. A time-calibrated Bayesian phylogeny dated the marine-freshwater divergence to the Early Jurassic (median 197 million years ago; 95% HPD: 124–275 Mya), congruent with the ancient divergence of their respective teleost host groups. These findings support re-evaluation of the current generic boundaries of Goussia and suggest that the hyper-divergent Epicellular lineage may warrant recognition as a distinct family basal to the Eimeriorina.\u0000 </div>","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"73 5","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148712843","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