Journal of Eukaryotic Microbiology最新文献_第6页

An Amoeboflagellate Halosymphonia sogumizoara gen. et sp. nov. (Tulamoebidae) in Heterolobosea Enhances the Core Halophilic Radiation of Eukaryotes. 异海中一种变形虫鞭毛藻Halosymphonia sogumizoara gen. et sp. 11 （Tulamoebidae）增强真核生物核心嗜盐辐射。

IF 3.3 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2026-05-01 DOI: 10.1111/jeu.70083

Hyeon Been Lee, Jong Soo Park

{"title":"An Amoeboflagellate Halosymphonia sogumizoara gen. et sp. nov. (Tulamoebidae) in Heterolobosea Enhances the Core Halophilic Radiation of Eukaryotes.","authors":"Hyeon Been Lee, Jong Soo Park","doi":"10.1111/jeu.70083","DOIUrl":"10.1111/jeu.70083","url":null,"abstract":"Most known halophilic and halotolerant eukaryotes belong to the taxon Heterolobosea sensu lato. Within this group, the Tulamoebidae-Aurem clade comprises exclusively halophiles, supporting the hypothesis that this clade represents an adaptive radiation of halophilic eukaryotes. In this study, we describe a novel amoeboflagellate, strain TA, isolated from a sample with a salinity level of 200 practical salinity units (PSU). Morphological and molecular analyses indicate that strain TA belongs to the Heterolobosea, forming a sister lineage to Aurem hypersalina and clustering with Tulamoebidae. The amoeboid stage exhibits a monopodial limax form with eruptive movement and numerous inclusions, whereas the flagellate form differs distinctly from that of A. hypersalina, exhibiting homodynamic flagella beating. Strain TA grows optimally at 100-150 PSU. We designate it as Halosymphonia sogumizoara gen. nov., et sp. nov., and expand the Tulamoebidae by including Halosymphonia together with Aurem. Based on our qualitative estimation, H. sogumizoara displayed a steady increase in intracellular Na+ concentration with increasing salinity (100-200 PSU), while K+ levels remained relatively stable, suggesting a primarily salt-out strategy. Therefore, Tulamoebidae represents a core halophilic eukaryotic clade for comparative evolutionary and physiological studies with halophilic prokaryotes.","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"73 3","pages":"e70083"},"PeriodicalIF":3.3,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147772981","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

Morphology, Ultrastructure, and Classification of Barthelonids (Metamonada Incertae Sedis): With Descriptions of Microbarthelona Gen. Nov., and Parabarthelona Gen. Nov. barthelonaceae （Metamonada Incertae Sedis）的形态、超微结构和分类——附Microbarthelona Gen. Nov.和parabthelonona Gen. Nov.的描述。

IF 3.3 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2026-05-01 DOI: 10.1111/jeu.70080

Takashi Shiratori, Yana Eglit, Euki Yazaki, Yuji Inagaki, Alastair G B Simpson

{"title":"Morphology, Ultrastructure, and Classification of Barthelonids (Metamonada Incertae Sedis): With Descriptions of Microbarthelona Gen. Nov., and Parabarthelona Gen. Nov.","authors":"Takashi Shiratori, Yana Eglit, Euki Yazaki, Yuji Inagaki, Alastair G B Simpson","doi":"10.1111/jeu.70080","DOIUrl":"10.1111/jeu.70080","url":null,"abstract":"Barthelona is a genus of anaerobic flagellates that forms a sister lineage to Fornicata along with Skoliomonas. Although \"Barthelona spp.\" are known to separate into three distinct lineages, their detailed morphology has not been examined, and their taxonomic classification is incomplete. In this study, we investigated the morphology, especially ultrastructure, of three cultures of barthelonids, each representing one lineage. These flagellates possess an inconspicuous ventral groove and a highly elongated cytopharynx that originates near the posterior end of the cell and extends toward the anterior end. Their posterior flagellum lacks a vane. The flagellar apparatus shares some features with those of other excavate flagellates in possessing microtubular roots R1, split R2 and R3, but lacks a singlet root, B fiber and discernable C fiber. Notably, R2 splits near the posterior end of the cell. Cell size and the number of microtubules comprising R1 and R2 vary among strains. Based on these observations, we describe two new genera and species, Microbarthelona vorax gen. nov., sp. nov. and Parabarthelona vacuolata gen. nov., sp. nov. Additionally, we propose the following higher taxa for Barthelona, Microbarthelona, and Parabarthelona: Notopharyngea cl. nov., Barthelonida ord. nov., and Barthelonidae fam. nov.","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"73 3","pages":"e70080"},"PeriodicalIF":3.3,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13087550/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147698542","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 Revised Understanding of Petalomonad Diversity (Petalomonadida; Euglenida) Enabled by a Cultivation Approach, With Five New Species and Two New Genera. 5新种2新属的栽培方法对Petalomonadida； Euglenida植物多样性的修正认识。

IF 3.3 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2026-05-01 DOI: 10.1111/jeu.70073

Won Je Lee, Gordon Lax, Elizabeth J Weston, Julia A Packer, Alexandra Hall, Sun Young Kim, Dong Hyuk Jeong, Alastair G B Simpson

{"title":"A Revised Understanding of Petalomonad Diversity (Petalomonadida; Euglenida) Enabled by a Cultivation Approach, With Five New Species and Two New Genera.","authors":"Won Je Lee, Gordon Lax, Elizabeth J Weston, Julia A Packer, Alexandra Hall, Sun Young Kim, Dong Hyuk Jeong, Alastair G B Simpson","doi":"10.1111/jeu.70073","DOIUrl":"10.1111/jeu.70073","url":null,"abstract":"Euglenids are an important group of free-living phototrophic, osmotrophic, or phagotrophic protists, with most of the phylogenetic diversity represented by phagotrophs. One major subgroup of phagotrophs is the petalomonads: rigid, often relatively small cells with few pellicle strips (usually 4-8). They have been proposed to be sisters to other euglenids, a pivotal evolutionary position supported by multigene phylogenies. Most described petalomonads are assigned to either Petalomonas or Notosolenus; however, neither is monophyletic, and existing genera clearly do not reflect phylogenetic diversity within petalomonads. We report 14 Petalomonas or Notosolenus-like isolates and characterize them using light microscopy, scanning electron microscopy (for most), and SSU rDNA phylogenetics. Most isolates branch in/with three of the five known major clades within petalomonads; however, a new major clade is revealed that houses an isolate identified as Petalomonas poosilla, plus five freshwater Notosolenus isolates, including the type species Notosolenus apocamptus. Overall, we report five new species, plus five new combinations that transfer Notosolenus-like species assigned to other clades to two new genera, Tonotosolenus and Unotosolenus. Over half of the isolates are monoprotistan cultures, markedly increasing the availability of tractable petalomonads for examining euglenid biology in a comparative evolutionary framework.","PeriodicalId":15672,"journal":{"name":"Journal of Eukaryotic Microbiology","volume":"73 3","pages":"e70073"},"PeriodicalIF":3.3,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13093001/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147722772","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

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2026-04-29

引用次数: 0

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2026-04-29

引用次数: 0

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2026-04-29

引用次数: 0

IF 2.6 4区生物学

Journal of Eukaryotic Microbiology Pub Date : 2026-04-28