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| Main Authors: | , , , , , , , |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
The Journal of eukaryotic microbiology
2026
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| Subjects: | |
| Online Access: | https://pubmed.ncbi.nlm.nih.gov/42003234/ |
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| _version_ | 1868266059497209857 |
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| author | Lee, Won Je Lax, Gordon Weston, Elizabeth J Packer, Julia A Hall, Alexandra Kim, Sun Young Jeong, Dong Hyuk Simpson, Alastair G B |
| author_facet | Lee, Won Je Lax, Gordon Weston, Elizabeth J Packer, Julia A Hall, Alexandra Kim, Sun Young Jeong, Dong Hyuk Simpson, Alastair G B Lee, Won Je Lax, Gordon Weston, Elizabeth J Packer, Julia A Hall, Alexandra Kim, Sun Young Jeong, Dong Hyuk Simpson, Alastair G B |
| collection | PubMed - marine biology |
| contents | A Revised Understanding of Petalomonad Diversity (Petalomonadida; Euglenida) Enabled by a Cultivation Approach, With Five New Species and Two New Genera. Lee, Won Je Lax, Gordon Weston, Elizabeth J Packer, Julia A Hall, Alexandra Kim, Sun Young Jeong, Dong Hyuk Simpson, Alastair G B Phylogeny Euglenida DNA, Ribosomal Microscopy, Electron, Scanning DNA, Protozoan Sequence Analysis, DNA Molecular Sequence Data RNA, Ribosomal, 18S 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. |
| format | Artículo científico |
| id | pubmed_42003234 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | The Journal of eukaryotic microbiology |
| record_format | pubmed |
| spellingShingle | A Revised Understanding of Petalomonad Diversity (Petalomonadida; Euglenida) Enabled by a Cultivation Approach, With Five New Species and Two New Genera. Lee, Won Je Lax, Gordon Weston, Elizabeth J Packer, Julia A Hall, Alexandra Kim, Sun Young Jeong, Dong Hyuk Simpson, Alastair G B Phylogeny Euglenida DNA, Ribosomal Microscopy, Electron, Scanning DNA, Protozoan Sequence Analysis, DNA Molecular Sequence Data RNA, Ribosomal, 18S A Revised Understanding of Petalomonad Diversity (Petalomonadida; Euglenida) Enabled by a Cultivation Approach, With Five New Species and Two New Genera. Lee, Won Je Lax, Gordon Weston, Elizabeth J Packer, Julia A Hall, Alexandra Kim, Sun Young Jeong, Dong Hyuk Simpson, Alastair G B Phylogeny Euglenida DNA, Ribosomal Microscopy, Electron, Scanning DNA, Protozoan Sequence Analysis, DNA Molecular Sequence Data RNA, Ribosomal, 18S 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. |
| title | A Revised Understanding of Petalomonad Diversity (Petalomonadida; Euglenida) Enabled by a Cultivation Approach, With Five New Species and Two New Genera. |
| topic | Phylogeny Euglenida DNA, Ribosomal Microscopy, Electron, Scanning DNA, Protozoan Sequence Analysis, DNA Molecular Sequence Data RNA, Ribosomal, 18S |
| url | https://pubmed.ncbi.nlm.nih.gov/42003234/ |