IF 2.5 3区生物学

Protist Pub Date : 2022-08-01 DOI: 10.1016/j.protis.2022.125887

Daniel Méndez-Sánchez, Ondřej Pomahač, Johana Rotterová , William Bourland, Ivan Čepička

{"title":"Diversity and Phylogenetic Position of Bothrostoma Stokes, 1887 (Ciliophora: Metopida), with Description of Four New Species","authors":"Daniel Méndez-Sánchez, Ondřej Pomahač, Johana Rotterová , William Bourland, Ivan Čepička","doi":"10.1016/j.protis.2022.125887","DOIUrl":"10.1016/j.protis.2022.125887","url":null,"abstract":"<div>Bothrostoma is a genus of anaerobic ciliates in family Metopidae comprising four species, all described based solely on the morphology of living and fixed cells. Unlike other metopids, cells of Bothrostoma are not twisted anteriorly, have a flattened preoral dome, a very prominent sail-like paroral membrane, and an adoral zone of distinctive, very narrow, curved membranelles confined to a wide, non-spiraling peristome on the ventral side. We examined 20 populations of Bothrostoma from hypoxic freshwater sediments. We provide morphological characterization and 18S rRNA gene sequences of four new species, namely B. bimicronucleatum sp. nov., B. boreale sp. nov., B. kovalyovi sp. nov., and B. robustum sp. nov., as well as B. undulans (type species), B. nasutum, and B. ovale comb. nov. (original combination Metopus undulans var. ovalis Kahl, 1932). Except for B. nasutum, Bothrostoma species show low genetic variability among geographically distant populations. Intraspecific phenotypic variability might be driven by environmental conditions. In phylogenetic analyses, Bothrostoma is not closely related to Metopus sensu stricto and forms a moderately supported clade with Planometopus, here referred to as BoPl clade. The anterior axial torsion of the body, typical of other Metopidae, appears to have been lost in the last common ancestor of the BoPl clade.</div>","PeriodicalId":20781,"journal":{"name":"Protist","volume":"173 4","pages":"Article 125887"},"PeriodicalIF":2.5,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43833919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 4

Illustrating the Invisible: The Role of Drawing in the Career of Bland J. Finlay. 阐释无形:绘画在布兰德·j·芬利职业生涯中的作用。

IF 2.5 3区生物学

Protist Pub Date : 2022-08-01 DOI: 10.2139/ssrn.4175942

Carlos Finlay

引用次数: 0

Free-living Trichomonads are Unexpectedly Diverse 自由生活的滴虫出乎意料地多样化

IF 2.5 3区生物学

Protist Pub Date : 2022-08-01 DOI: 10.1016/j.protis.2022.125883

Vít Céza , Michael Kotyk , Aneta Kubánková , Naoji Yubuki , František Šťáhlavský , Jeffrey D. Silberman , Ivan Čepička

{"title":"Free-living Trichomonads are Unexpectedly Diverse","authors":"Vít Céza , Michael Kotyk , Aneta Kubánková , Naoji Yubuki , František Šťáhlavský , Jeffrey D. Silberman , Ivan Čepička","doi":"10.1016/j.protis.2022.125883","DOIUrl":"10.1016/j.protis.2022.125883","url":null,"abstract":"<div>The vast majority of the more than 450 described species of Parabasalia are intestinal symbionts or parasites of animals. This endobiotic life-history is presumably ancestral although the root of Parabasalia still needs to be robustly established. The half-dozen putatively free-living species thus far described are likely independently derived from endobiotic ancestors and represent the most neglected ecological group of parabasalids. Thus, we isolated and cultivated 45 free-living strains of Parabasalia obtained from a wide variety of anoxic sediments to conduct detailed morphological and SSU rRNA gene phylogenetic analyses. Sixteen species of trichomonads were recovered. Among them, we described seven new species, three new genera, two new families, and one new order. Most of the newly described species were more or less closely related to members of already described genera. However, we uncovered a new deep-branching lineage without affinity to any currently known group of Parabasalia. The newly discovered free-living parabasalids will be key taxa in comparative analyses aimed at rooting the entire lineage and deciphering the evolutionary innovations involved in transitioning between endobiotic and free-living habitats.</div>","PeriodicalId":20781,"journal":{"name":"Protist","volume":"173 4","pages":"Article 125883"},"PeriodicalIF":2.5,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43984862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 3

On the Biology, Diversity and Evolution of Nucleariid Amoebae (Amorphea, Obazoa, Opisthokonta1 核变形虫(Amorphea, Obazoa, Opisthokonta1)的生物学、多样性和进化

IF 2.5 3区生物学

Protist Pub Date : 2022-08-01 DOI: 10.1016/j.protis.2022.125895

Toni Gabaldón , Eckhard Völcker , Guifré Torruella

{"title":"On the Biology, Diversity and Evolution of Nucleariid Amoebae (Amorphea, Obazoa, Opisthokonta1","authors":"Toni Gabaldón , Eckhard Völcker , Guifré Torruella","doi":"10.1016/j.protis.2022.125895","DOIUrl":"10.1016/j.protis.2022.125895","url":null,"abstract":"<div>Nucleariids are a small group of free-living heterotrophic amoebae. Although these organisms present a variety of cell sizes and cell coverings, they are mostly spherical cells with radiating filopodia, sometimes with several nuclei. Nuclearia, the genus that gives the name to the group, contains species that are opportunistic consumers of detritus, bacteria, and algae. The beautiful Pompholyxophrys is covered with endogenous siliceous pearls. Lithocolla covers itself with sand particles, or otherwise diatom frustules. The tiny Parvularia exclusively feeds on bacteria, and Fonticula is adapted to solid substrates and presents aggregative multicellular stages. Nucleariids belong to the Opisthokonta, which comprise animals, fungi, and their protist relatives, and form the earliest branch in the holomycotan clade (fungi and closest relatives). Hence, they are key for understanding the origin and diversification of Opisthokonta, an eukaryotic supergroup that contains organisms with different feeding modes, life-styles, and cell organizations. In this review, the reader will find an introduction to nucleariids, from their discovery in the 19th century until the most recent studies. It summarizes available information on their morphology, life history, cell organisation, ecology, diversity, systematics and evolution.</div>","PeriodicalId":20781,"journal":{"name":"Protist","volume":"173 4","pages":"Article 125895"},"PeriodicalIF":2.5,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1434461022000402/pdfft?md5=838cb2e60ed321ed12456962015a3659&pid=1-s2.0-S1434461022000402-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40597887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 1

Meeting Report: Euglenids in the Age of Symbiogenesis: Origins, Innovations, and Prospects, November 8–11, 2021 会议报告:共生时代的Euglenids:起源、创新与展望，2021年11月8-11日

IF 2.5 3区生物学

Protist Pub Date : 2022-08-01 DOI: 10.1016/j.protis.2022.125894

Emma Kaszecki , Victoria Kennedy , Mahfuzur Shah , Kacper Maciszewski , Anna Karnkowska , Eric Linton , Michael L. Ginger , Scott Farrow , ThankGod Echezona Ebenezer

引用次数: 1

Five Groups in the Genus Allovahlkampfia and the Description of the New Species Vahlkampfia bulbosis n.sp. 异球镰孢属五个类群及新种球镰孢的记述。

IF 2.5 3区生物学

Protist Pub Date : 2022-06-01 DOI: 10.1016/j.protis.2022.125870

Zhilei Gao , Alexandre Jousset , George A. Kowalchuk , Stefan Geisen

{"title":"Five Groups in the Genus Allovahlkampfia and the Description of the New Species Vahlkampfia bulbosis n.sp.","authors":"Zhilei Gao , Alexandre Jousset , George A. Kowalchuk , Stefan Geisen","doi":"10.1016/j.protis.2022.125870","DOIUrl":"10.1016/j.protis.2022.125870","url":null,"abstract":"<div>Heterolobosea is one of the major protist groups in soils. While an increasing number of soil heterolobosean species has been described, we have likely only scratched the surface of heterolobosean diversity in soils. Here, we expand this knowledge by morphologically and molecularly classifying four novel strains. One was identified as Naegleria clarki, while the remaining three strains had no identical Blast hit against GenBank and could only be reliably identified to the genus level: two strains as Allovahlkampfia spp. and one strain as Vahlkampfia sp. One Allovahlkampfia strain was most closely affiliated with Allovahlkampfia sp. Nl64 and the other strain was affiliated with ‘Solumitrus’ palustris, which is now named Allovahlkampfia palustris comb.nov. As there are only two valid species described within Allovahlkampfia, we combined all published sequences related to Allovahlkampfia and propose five new groups within this genus. The last strain was most closely related, but clearly distinct from, Vahlkampfia orchilla, based on DNA barcoding. As such, we propose this amoeba as a new species named Vahlkampfia bulbosis n.sp. Together, our study extends the described diversity of soil heteroloboseans through the description of a new Vahlkampfia species and by revising the morphologically and phylogenetically diverse genus Allovahlkampfia.</div>","PeriodicalId":20781,"journal":{"name":"Protist","volume":"173 3","pages":"Article 125870"},"PeriodicalIF":2.5,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1434461022000153/pdfft?md5=97c1c04a96e1c960ab2253e0546ca41b&pid=1-s2.0-S1434461022000153-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44390164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 3

Re-visiting the ridiculed rival of Leeuwenhoek: Louis Joblot (1645–1723) 再次拜访被嘲笑的列文虎克的对手：路易·乔布罗特（1645-1723）。

IF 2.5 3区生物学

Protist Pub Date : 2022-06-01 DOI: 10.1016/j.protis.2022.125882

John R. Dolan

引用次数: 0

Morphology, Morphogenesis and Molecular Phylogeny of a New Soil Ciliate, Holostichides eastensis nov. spec. (Ciliophora, Hypotrichia) 一种新的土壤纤毛虫，Holostichides eastensis 11 . spec.(纤毛虫目，下毛目)的形态、形态发生和分子系统发育。

IF 2.5 3区生物学

Protist Pub Date : 2022-06-01 DOI: 10.1016/j.protis.2022.125881

Yurui Wang , Jingbao Li , Jingyi Wang , Chen Shao

{"title":"Morphology, Morphogenesis and Molecular Phylogeny of a New Soil Ciliate, Holostichides eastensis nov. spec. (Ciliophora, Hypotrichia)","authors":"Yurui Wang , Jingbao Li , Jingyi Wang , Chen Shao","doi":"10.1016/j.protis.2022.125881","DOIUrl":"10.1016/j.protis.2022.125881","url":null,"abstract":"<div>A new bakuellid ciliate, Holostichides eastensis nov. spec. isolated from China, is investigated in terms of its morphology, ontogenesis, and molecular phylogenesis. It is characterized by size 150–180 µm × 45–60 µm in vivo; 27–46 macronuclear nodules; cortical granules dark brown, spherical, about 0.5 µm across, clustered in groups and then arranged longitudinally; three frontal cirri with one to four smaller cirri below the middle one, a buccal cirrus, nine to 15 frontoterminal cirri, and midventral complex composed of five to eight cirral pairs and two long midventral rows. The main events during binary fission are as follows: (1) in the proter, the undulating membrane anlage is formed from both the dedifferentiation of old undulating membranes and the basal bodies developing de novo, and the proximal part of the parental adoral zone of membranelles is renewed by a field of basal bodies that originates de novo; (2) in the opisthe, the oral primordium is formed intrakinetally; (3) besides the middle frontal cirrus and buccal cirrus, the FVT-anlagen II produces the extra one to four cirri. Phylogenetic analyses based on SSU rDNA sequence data suggest a close relationship between Holostichides eastensis nov. spec. and its congeners, indicating that the genus Holostichides is monophyletic.</div>","PeriodicalId":20781,"journal":{"name":"Protist","volume":"173 3","pages":"Article 125881"},"PeriodicalIF":2.5,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45807420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Rimoportula Distribution, Heterovalvy and Heteropolarity in Hyalosira (Bacillariophyta: Rhabdonematales), with Revision of H. hesperia and Two New Species Hyalosira中轮扇的分布、异瓣和异极性（硅藻门：Rhabdonematales），附H.hesperia的修订和两个新种。

IF 2.5 3区生物学

Protist Pub Date : 2022-06-01 DOI: 10.1016/j.protis.2022.125869

Christopher S. Lobban , Nihayet Bizsel , Saúl Blanco

{"title":"Rimoportula Distribution, Heterovalvy and Heteropolarity in Hyalosira (Bacillariophyta: Rhabdonematales), with Revision of H. hesperia and Two New Species","authors":"Christopher S. Lobban , Nihayet Bizsel , Saúl Blanco","doi":"10.1016/j.protis.2022.125869","DOIUrl":"10.1016/j.protis.2022.125869","url":null,"abstract":"<div>The genus Hyalosira Kützing was recently split and emended based on morphology and molecular phylogeny but many uniseriate taxa could not be resolved. All populations examined in that study had one rimoportula on each valve (i.e., 1 + 1 in the cell). Recent collections from Turkey, Australia, and Micronesia had uniseriate taxa with different numbers of rimoportulae and other new features distinguishing them from all other uniseriate taxa. Two species had two rimoportulae per valve (i.e., 2 + 2) and deep septa, of which one is shown to be Hyalosira hesperia Álvarez-Blanco & S.Blanco, for which we provide a revised description, and the other, from Melbourne and Yap, is proposed as H. pacifica, sp. nov. They are separated by stria density and copula areola density. A third species, from the Great Barrier Reef, H. flexa, sp. nov., is the first Hyalosira found with heterovalvy—including a rimoportula on only one valve (i.e., 1 + 0)—and heteropolarity, including three variously reduced pore fields and the fourth, with the rimoportula, always involved in attachment, essentially a basal pole. A corrected diagnosis of the genus is provided and implications for exploring the functions of rimoportulae are discussed.</div>","PeriodicalId":20781,"journal":{"name":"Protist","volume":"173 3","pages":"Article 125869"},"PeriodicalIF":2.5,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48327402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 1

Description of an Enigmatic Alveolate, Platyproteum noduliferae n. sp., and Reconstruction of its Flagellar Apparatus 一个谜状肺泡的描述，结节扁虫，及其鞭毛器的重建。

IF 2.5 3区生物学

Protist Pub Date : 2022-06-01 DOI: 10.1016/j.protis.2022.125878

Koh Yokouchi , Davis Iritani , Kay Hian Lim , Yong Heng Phua , Takeo Horiguchi , Kevin C. Wakeman

{"title":"Description of an Enigmatic Alveolate, Platyproteum noduliferae n. sp., and Reconstruction of its Flagellar Apparatus","authors":"Koh Yokouchi , Davis Iritani , Kay Hian Lim , Yong Heng Phua , Takeo Horiguchi , Kevin C. Wakeman","doi":"10.1016/j.protis.2022.125878","DOIUrl":"10.1016/j.protis.2022.125878","url":null,"abstract":"<div>Platyproteum is an enigmatic, monotypic genus formerly assigned to the Apicomplexa, until a recent phylogenomic study demonstrated that it diverged from the base of the chromerid/colpodellid (chrompodellid) taxa and apicomplexan clade. In the present study, a new species, P. noduliferae n. sp., is described using a combination of morphological and molecular data. Moreover, a reconstruction of the flagellar apparatus is presented to characterize the presence of flagella which was, until this study, an unknown trait for this genus. Phylogenetic analyses using rDNA sequences suggested that P. noduliferae n. sp. is a sister species of P. vivax, diverging from the base of chrompodellids and apicomplexans. This study provides new morphological data that corroborates the position of Platyproteum amongst other biflagellate species, contributing to an improved understanding of Platyproteum and the evolutionary changes undergone by some marine alveolates as they transitioned into obligate parasitic life styles.</div>","PeriodicalId":20781,"journal":{"name":"Protist","volume":"173 3","pages":"Article 125878"},"PeriodicalIF":2.5,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45496842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 1

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