European journal of protistology最新文献_第2页

Molecular characterization and analysis of enoyl-CoA hydratase/isomerase family protein of Eimeria tenella 柔嫩艾美耳球虫烯酰辅酶a水合酶/异构酶家族蛋白的分子特征及分析

IF 1.6 2区生物学

European journal of protistology Pub Date : 2026-02-01 Epub Date: 2025-12-05 DOI: 10.1016/j.ejop.2025.126177

Shisi Zhang , Shunhai Zhu , Wenhao Huang , Qiping Zhao , Lu Wang , Hui Dong , Jenwen Wang , Yu Yu , Hongyu Han

{"title":"Molecular characterization and analysis of enoyl-CoA hydratase/isomerase family protein of Eimeria tenella","authors":"Shisi Zhang , Shunhai Zhu , Wenhao Huang , Qiping Zhao , Lu Wang , Hui Dong , Jenwen Wang , Yu Yu , Hongyu Han","doi":"10.1016/j.ejop.2025.126177","DOIUrl":"10.1016/j.ejop.2025.126177","url":null,"abstract":"<div><div>Avian coccidiosis is an important intestinal disease caused by <em>Eimeria</em> spp., which leads to significant economic losses in the poultry industry. Although anticoccidial drugs can effectively control it in intensive farming, their extensive and irrational use has induced drug resistance in <em>Eimeria</em> species. Our previous RNA-seq study revealed differential expression of the enoyl-CoA hydratase/isomerase family protein (<em>Et</em>ECHI) between drug-sensitive (DS) and drug-resistant <em>Eimeria tenella</em> strains. In this study, qPCR analysis showed that <em>Et</em>ECHI mRNA levels were significantly upregulated in diclazuril-resistant (DZR) and maduramicin-resistant (MRR) strains compared to the DS strain. Furthermore, <em>Et</em>ECHI transcription increased progressively with rising concentrations of MRR and DZR. Additionally, <em>Et</em>ECHI transcript levels were significantly higher in field-isolated diclazuril-resistant strains than in the DS strain. qPCR and western blot analyses showed that <em>Et</em>ECHI expression levels were highest in <em>E. tenella</em> unsporulated oocysts. Indirect immunofluorescence assays (IFA) revealed that <em>Et</em>ECHI was primarily localized in the cytoplasm of the parasite, with additional surface distribution. An in vitro inhibition assay demonstrated that anti-r<em>Et</em>ECHI polyclonal antibodies significantly reduced <em>E. tenella</em> sporozoites' invasion of DF-1 cells. These findings suggest that <em>Et</em>ECHI may be associated with the drug resistance of <em>E. tenella</em> and may play a role in parasite growth and development within host cells.</div></div>","PeriodicalId":12042,"journal":{"name":"European journal of protistology","volume":"102 ","pages":"Article 126177"},"PeriodicalIF":1.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145712002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Scottish nearshore monothalamid Foraminifera (Rhizaria): Description of five new species and one new genus 苏格兰近岸单thalamid有孔虫（根状目）：五个新种和一个新属的描述

IF 1.6 2区生物学

European journal of protistology Pub Date : 2026-02-01 Epub Date: 2026-01-06 DOI: 10.1016/j.ejop.2026.126181

Zaineb Henderson , Maria Holzmann , Andrew J. Gooday

{"title":"Scottish nearshore monothalamid Foraminifera (Rhizaria): Description of five new species and one new genus","authors":"Zaineb Henderson , Maria Holzmann , Andrew J. Gooday","doi":"10.1016/j.ejop.2026.126181","DOIUrl":"10.1016/j.ejop.2026.126181","url":null,"abstract":"<div><div>Henderson (2023) gave informal descriptions of several soft-walled, monothalamid foraminifera from intertidal zones in the Lorne area of northwest Scotland based on morphology. In the present study, we use a combination of morphological and molecular data to formally establish one new genus and five new monothalamid species from the same area. <em>Lorneia sphaerica</em> gen. & sp. nov. (monothalamid Clade D) has a spherical, coarsely agglutinated test containing magnetic particles and minute aperture-like openings distributed around the test. <em>Lorneia ovalis</em> gen. & sp. nov. (Clade D) has similar characteristics, but the test is oval, and there is a terminal aperture situated at each end. <em>Psammophaga owensi</em> sp. nov. (Clade E) has an oval, finely agglutinated test with a simple terminal aperture and intracellular magnetic particles. In <em>Hilla brevis</em> sp. nov. (Clade Y), the test is broadly oval and finely agglutinated with a reflective sheen and a large terminal aperture with a pronounced collar. <em>Flaviatella zaninettiae</em> sp. nov. (Clade Y) has an elongate, finely agglutinated test with a reflective sheen, a tubular terminal apertural structure, and distinctive yellow cytoplasm. Two species, <em>Flexammina islandica</em> Voltski and Pawlowski, 2015 and <em>Ovammina opaca</em> Dahlgren, 1962, are reported for the first time in Scottish coastal waters. This study underlines the importance and diversity of monothalamid foraminifera in coastal settings.</div></div>","PeriodicalId":12042,"journal":{"name":"European journal of protistology","volume":"102 ","pages":"Article 126181"},"PeriodicalIF":1.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146073657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Step-by-step exploration of the diversity of the genus Bothrostoma Stokes, 1887 (Ciliophora, Armophorea) in Korea using morphological and molecular analyses 利用形态学和分子分析逐步探索Bothrostoma Stokes， 1887（纤毛蝗科，犰狳科）在韩国的多样性

IF 1.6 2区生物学

European journal of protistology Pub Date : 2026-02-01 Epub Date: 2025-11-24 DOI: 10.1016/j.ejop.2025.126174

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

{"title":"Step-by-step exploration of the diversity of the genus Bothrostoma Stokes, 1887 (Ciliophora, Armophorea) in Korea using morphological and molecular analyses","authors":"Quoc Dung Nguyen, Nanda Dwi Kristanti, Novia Cahyani, Mann Kyoon Shin","doi":"10.1016/j.ejop.2025.126174","DOIUrl":"10.1016/j.ejop.2025.126174","url":null,"abstract":"<div><div>The genus <em>Bothrostoma</em> Stokes, 1887 appears more diverse than previously reported. Recent studies have uncovered several new species, yet the full extent of its diversity remains to be revealed. In this study, we describe two new species, <em>Bothrostoma longicilia</em> nov. sp. and <em>B. dextroproboscis</em> nov. sp., collected from freshwater ponds in South Korea. Their characterization was conducted using both morphological and molecular approaches. <em>Bothrostoma longicilia</em> nov. sp. is distinguished by a combination of prominent caudal cilia, a short acute snout, 30–40 somatic kineties (including 11–15 postoral kineties), and cortical granules arranged in 7–8 discontinuous oblique rows between adjacent somatic kineties. <em>Bothrostoma dextroproboscis</em> nov. sp. is characterized by a rectangular shape, with the anterior left end terminating in a short acute snout and the right anterior end extended into a flexible proboscis, an oblong macronucleus, and an adoral zone of membranelles extending over approximately two-thirds of the body length. Molecular phylogenetic analysis based on SSU rDNA sequences supports the distinctness of these two new species and confirms the monophyly of the genus <em>Bothrostoma</em>.</div></div>","PeriodicalId":12042,"journal":{"name":"European journal of protistology","volume":"102 ","pages":"Article 126174"},"PeriodicalIF":1.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145712001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Ultrastructural data on stomatocysts of the genus Paraphysomonas (Chrysophyceae, Paraphysomonadales), including description of one new morphotype and identification of a new producer of Stomatocyst 52 副葡萄单胞菌属（chrysophyae, Paraphysomonadales）口囊的超微结构资料，包括一个新形态的描述和一个新生产者的鉴定52

IF 1.6 2区生物学

European journal of protistology Pub Date : 2026-02-01 Epub Date: 2025-11-24 DOI: 10.1016/j.ejop.2025.126173

Alena D. Firsova, Anna Y. Bessudova, Yelena V. Likhoshway

{"title":"Ultrastructural data on stomatocysts of the genus Paraphysomonas (Chrysophyceae, Paraphysomonadales), including description of one new morphotype and identification of a new producer of Stomatocyst 52","authors":"Alena D. Firsova, Anna Y. Bessudova, Yelena V. Likhoshway","doi":"10.1016/j.ejop.2025.126173","DOIUrl":"10.1016/j.ejop.2025.126173","url":null,"abstract":"<div><div>Among the diverse morphotypes of siliceous stomatocysts, not all producer species have been identified. Using scanning electron microscopy, we determined the species affiliation of two <em>Paraphysomonas</em> stomatocyst morphotypes based on the presence of species-specific siliceous scales on their surfaces. A new morphotype, Stomatocyst 514 Firsova & Bessudova, is formally described, and its relationship to <em>Paraphysomonas circumvallata</em> Thomsen was established on the basis of attached plate-scales. The previously described morphotype Stomatocyst 52 Duff & Smol, 1991 emend. Duff et al., 1995 is related to the species <em>Paraphysomonas corynephora</em>. The ecology of these two species differs considerably: cyst formation in <em>P. circumvallata</em> was observed in the southern basin of Lake Baikal in August at a water temperature of 14.3 °C, whereas <em>P. corynephora</em> formed cysts in the Angara River in May at 4.8 °C. These findings expand the potential for analyzing the biogeography of these species and may be applied to paleoclimatic reconstructions. The morphological diversity and ultrastructural features of all currently known stomatocyst morphotypes within the genus <em>Paraphysomonas</em> are discussed, and an updated identification key is provided.</div></div>","PeriodicalId":12042,"journal":{"name":"European journal of protistology","volume":"102 ","pages":"Article 126173"},"PeriodicalIF":1.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145712003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Seasonal effects on Chlorella sorokiniana UCAM 001 growth and physiology in flat-plate photobioreactors in Morocco's arid climate 摩洛哥干旱气候下平板光生物反应器中小球藻ucam001生长和生理的季节性影响

IF 1.6 2区生物学

European journal of protistology Pub Date : 2025-10-01 DOI: 10.1016/j.ejop.2025.126171

Aafaf Krimech , Sofyan Sbahi , Ouafa Cherifi , Abdessamad Hejjaj , Richard Mugani , Naaila Ouazzani , Martin Kerner , Brahim Oudra , Laila Mandi

{"title":"Seasonal effects on Chlorella sorokiniana UCAM 001 growth and physiology in flat-plate photobioreactors in Morocco's arid climate","authors":"Aafaf Krimech , Sofyan Sbahi , Ouafa Cherifi , Abdessamad Hejjaj , Richard Mugani , Naaila Ouazzani , Martin Kerner , Brahim Oudra , Laila Mandi","doi":"10.1016/j.ejop.2025.126171","DOIUrl":"10.1016/j.ejop.2025.126171","url":null,"abstract":"<div><div>This study aims to investigate the seasonal variation in growth and physiology of <em>Chlorella sorokiniana</em> UCAM 001 strain using annual optimization monitoring with a groundwater medium in two outdoor flat-plate photobioreactors (PBRs), which were first scaled up at the Faculty of Sciences Semlalia (Marrakech, Morocco). The culture medium was adjusted to ensure non-limiting nutrient concentrations (10 mg·L<sup>−1</sup> and 100 mg·L<sup>−1</sup> of additional phosphorus and nitrate, respectively). Temperature, light, and algal growth were monitored daily. Proline, glycine betaine, and catalase levels were measured every four days to assess the degree of algal stress. Biomass productivity increased during spring, reaching 30 mg·L<sup>−1</sup>·day<sup>−1</sup> with a specific growth rate of 0.73 day<sup>−1</sup>. However, no growth was observed during the summer. Physiological analysis revealed increased proline and glycine betaine levels during autumn and winter due to temperatures as low as 13 °C. In contrast, catalase concentration peaked in spring. Pearson correlation analysis indicated that nutrient limitation, together with temperature and light intensity, induced stress in <em>C. sorokiniana</em>, stimulating catalase production. Algal growth efficiently removed nutrients from the medium, achieving removal rates of 97 % for total phosphorus and 87 % for total nitrogen. Optimized cooling systems will improve PBR efficiency and support algal growth under extreme summer conditions.</div></div>","PeriodicalId":12042,"journal":{"name":"European journal of protistology","volume":"101 ","pages":"Article 126171"},"PeriodicalIF":1.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145312736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Morphogenesis of the anaerobic ciliate Tropidoatractus levanderi (Ciliophora, Armophorea, Metopida), with notes on conjugation and molecular phylogeny 厌氧纤毛虫troidatractus leanderi（纤毛虫目，纤毛虫目，Metopida目）的形态发生及其偶联和分子系统发育的注释

IF 1.6 2区生物学

European journal of protistology Pub Date : 2025-10-01 Epub Date: 2025-09-15 DOI: 10.1016/j.ejop.2025.126166

Xiaochen Feng , Wenbao Zhuang , Ran Li , Xiaozhong Hu

引用次数: 0

Comparative genomics reveals insights into the ultrafast Ca2+-dependent cell contraction in ciliates (Eukaryota, SAR, Alveolata) 比较基因组学揭示了纤毛虫（真核生物，SAR，肺泡动物）中Ca2+依赖性细胞的超快收缩

IF 1.6 2区生物学

European journal of protistology Pub Date : 2025-10-01 Epub Date: 2025-09-18 DOI: 10.1016/j.ejop.2025.126167

Ying Zhang , Fasheng Liang , Chunying Xu , Alan Warren , Lifang Li

{"title":"Comparative genomics reveals insights into the ultrafast Ca2+-dependent cell contraction in ciliates (Eukaryota, SAR, Alveolata)","authors":"Ying Zhang , Fasheng Liang , Chunying Xu , Alan Warren , Lifang Li","doi":"10.1016/j.ejop.2025.126167","DOIUrl":"10.1016/j.ejop.2025.126167","url":null,"abstract":"<div><div>Certain ciliate taxa possess a Ca<sup>2+</sup>-dependent mechanism for ultrafast contraction, in addition to the more common adenosine triphosphate (ATP)-dependent process. In this study, we integrated omics data from 47 ciliate species, focusing on four target ciliate taxa: Vorticellidae, Zoothamniidae, <em>Stentor</em>, and <em>Spirostomum</em>. The spasmin gene, which encodes a key calcium-binding protein, was detected in 17 oligohymenophoreans (13 peritrichs, two peniculians, and two scuticociliatians) and three heterotricheans (one <em>Stentor</em> and two <em>Spirostomum</em> species). Gene family analysis revealed a roughly proportional relationship between genome/transcriptome size and the number of expanded gene families in these four target taxa. Functional enrichment analyses of significantly expanded gene families indicated rapid evolution of genes associated with phosphatase activity, dephosphorylation, signal transduction, metabolism, and transport. These findings provide new insights into the genomic adaptations underlying the unique contractile mechanisms of these ciliates.</div></div>","PeriodicalId":12042,"journal":{"name":"European journal of protistology","volume":"101 ","pages":"Article 126167"},"PeriodicalIF":1.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Ultrastructural characterization of Amyloodinium ocellatum (Dinoflagellata): Insights into trophont morphology and parasitic mode 斑点淀粉体（鞭毛纲）的超微结构特征：滋养体形态和寄生模式的见解

IF 1.6 2区生物学

European journal of protistology Pub Date : 2025-10-01 Epub Date: 2025-12-03 DOI: 10.1016/j.ejop.2025.126175

Zhicheng Li , Baotun Wang , Jingyu Zhuang , Anxing Li , Fei Yin

{"title":"Ultrastructural characterization of Amyloodinium ocellatum (Dinoflagellata): Insights into trophont morphology and parasitic mode","authors":"Zhicheng Li , Baotun Wang , Jingyu Zhuang , Anxing Li , Fei Yin","doi":"10.1016/j.ejop.2025.126175","DOIUrl":"10.1016/j.ejop.2025.126175","url":null,"abstract":"<div><div><em>Amyloodinium ocellatum</em> is a parasitic dinoflagellate that infects marine fish in tropical and subtropical regions, causing significant economic losses in aquaculture. This study used light microscopy (LM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electron tomography (ET) to comprehensively characterize the morphology, ultrastructure, and specialized attachment apparatus of <em>A. ocellatum</em> trophonts. The trophonts primarily parasitized the gill filaments of infected fish, reaching 89.8 ± 10.3 μm after 48 h of infection. Under LM, trophonts appeared as dark, spherical or pear-shaped structures that remained stationary throughout the parasitic process. SEM revealed surface folds and persistent transverse grooves, while TEM identified starch granules, lipid droplets, accumulation bodies, and microtubules. Trophonts rapidly formed rhizoids post-infection, which branched into root-hair-like projections penetrating the host epithelium. These projections functioned both as anchors and nutrient absorbers. During parasitism, trophonts induced degeneration and necrosis of host cells, leading to sloughing of epithelial cells and wound formation. ET further demonstrated that trophonts possessed numerous root-hair-like projections that deeply infiltrated host cells. This study provides the first systematic description of the morphology and ultrastructure of <em>A. ocellatum</em> trophonts and sheds new light on the fine structural features of the parasite's attachment apparatus.</div></div>","PeriodicalId":12042,"journal":{"name":"European journal of protistology","volume":"101 ","pages":"Article 126175"},"PeriodicalIF":1.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145681484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Diversity of protists in dryland habitats of Qatar revealed by environmental metabarcoding 环境元条形码揭示的卡塔尔旱地原生生物多样性。

IF 1.6 2区生物学

European journal of protistology Pub Date : 2025-10-01 Epub Date: 2025-09-16 DOI: 10.1016/j.ejop.2025.126168

Carla S.R. Huber , Luciano K. Huber , Sara H. Al-Hadidi , Talaat Ahmed , Sakeenah Adenan , Jane Oja , Amjad M. Shraim , Anna Ostapenko Alatalo , Mohammed Alsafran , Leho Tedersoo , Dana A. Abumaali , Laura R.P. Utz , Juha M. Alatalo

{"title":"Diversity of protists in dryland habitats of Qatar revealed by environmental metabarcoding","authors":"Carla S.R. Huber , Luciano K. Huber , Sara H. Al-Hadidi , Talaat Ahmed , Sakeenah Adenan , Jane Oja , Amjad M. Shraim , Anna Ostapenko Alatalo , Mohammed Alsafran , Leho Tedersoo , Dana A. Abumaali , Laura R.P. Utz , Juha M. Alatalo","doi":"10.1016/j.ejop.2025.126168","DOIUrl":"10.1016/j.ejop.2025.126168","url":null,"abstract":"<div><div>We investigated soil protist communities across five sites representing two characteristic dryland habitats in Qatar: rawdha and sabkha. Altogether, 100 samples were collected during a single field campaign; DNA was subsequently extracted, and the V4 region of the 18S rRNA gene was amplified. We obtained 112,529 high-quality sequences, taxonomically representing 1,524 TSAR (Telonemia, Stramenopila, Alveolata, Rhizaria) amplicon sequence variants. This approach enabled detection of diverse eukaryotic lineages and facilitated assessment of their diversity and relative abundance. Protist diversity differed significantly between habitats and among samples, while richness varied significantly between habitats. Across all samples, 170 genera were identified, of which 52 were shared across all sites. Sabkha exhibited the highest number of exclusive genera (22), nearly three times the number found in any individual rawdha site. The clade Alveolata accounted for 50 % or more of overall genus richness in most samples. Among ciliates, the classes Spirotrichea and Colpodea were the most abundant at the time of sampling. Functional analysis revealed consumers as the dominant trophic group. This study advances our understanding of microbial life in extremely hot environments by uniquely comparing two proximate terrestrial habitats that, despite similar climatic conditions, exhibit distinct edaphic and physicochemical characteristics.</div></div>","PeriodicalId":12042,"journal":{"name":"European journal of protistology","volume":"101 ","pages":"Article 126168"},"PeriodicalIF":1.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145198908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Two new freshwater foraminiferal species (SAR, Rhizaria) from Dinaric karst caves (southeastern Europe) 欧洲东南部迪纳尔喀斯特溶洞中的两个淡水有孔虫新种（SAR，根虫属）。

IF 1.6 2区生物学

European journal of protistology Pub Date : 2025-10-01 Epub Date: 2025-10-22 DOI: 10.1016/j.ejop.2025.126172

Najla Baković , Ferry Siemensma , Maria Holzmann

{"title":"Two new freshwater foraminiferal species (SAR, Rhizaria) from Dinaric karst caves (southeastern Europe)","authors":"Najla Baković , Ferry Siemensma , Maria Holzmann","doi":"10.1016/j.ejop.2025.126172","DOIUrl":"10.1016/j.ejop.2025.126172","url":null,"abstract":"<div><div>Non-marine foraminifera are among the least-studied groups of protists due to their low population densities, patchy distribution, and spatiotemporal variability. This study investigated foraminifera from four caves within the Dinaric karst region of southeastern Europe, using both morphological and molecular methods. Our results confirm the presence of foraminifera in all examined caves. A new monothalamous foraminifer, <em>Lacogromia cepelaki</em> sp. nov., is described based on morphological and molecular data from Jopićeva Cave (Croatia). Three additional <em>Lacogromia</em> taxa are informally described from different caves. However, due to the lack of distinct morphological characteristics, their formal taxonomic description will require molecular analyses of live specimens. A further important outcome of this study is the morphological description of <em>Spirolocammina petrae</em> sp. nov<em>.</em>, discovered in Miljacka II Cave (Croatia). This represents the first discovery of an agglutinated tubothalamid foraminifer adapted to a freshwater environment. As no molecular data could be obtained, its phylogenetic position remains undetermined, and further research will be necessary.</div></div>","PeriodicalId":12042,"journal":{"name":"European journal of protistology","volume":"101 ","pages":"Article 126172"},"PeriodicalIF":1.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145388066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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