Phylogeny of Euglenophyceae based on small subunit rDNA sequences: Taxonomic implications

Small subunit rDNA sequences of 42 taxa belonging to 10 genera were used to infer phylogenetic relationships among euglenoids. Members of the phototrophic genera Euglena, Phacus, Lepocinclis, Colacium, Trachelomonas, and Strombomonas plus the osmotrophs Astasia longa, Khawkinea quartana, and Hyaloph...

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Autores principales: Nudelman, M.A., Rossi, M.S., Conforti, V., Triemer, R.E.
Formato: JOUR
Materias:
Euglenoids
Euglenophyta
Euglenozoa
Molecular phylogeny
SSU rDNA
flagellate
phylogeny
taxonomy
algae
Astasia
Colacium
Euglena
Euglena longa
Euglenida
Eukaryota
Hyalophacus ocellatus
Khawkinea quartana
Lepocinclis
Lorica
Mastigophora (flagellates)
Phacus
Strombomonas
Trachelomonas
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00223646_v39_n1_p226_Nudelman
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00223646_v39_n1_p226_Nudelman
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spelling todo:paper_00223646_v39_n1_p226_Nudelman2023-10-03T14:32:01Z Phylogeny of Euglenophyceae based on small subunit rDNA sequences: Taxonomic implications Nudelman, M.A. Rossi, M.S. Conforti, V. Triemer, R.E. Euglenoids Euglenophyta Euglenozoa Molecular phylogeny SSU rDNA flagellate phylogeny taxonomy algae Astasia Colacium Euglena Euglena longa Euglenida Euglenozoa Eukaryota Hyalophacus ocellatus Khawkinea quartana Lepocinclis Lorica Mastigophora (flagellates) Phacus Strombomonas Trachelomonas Small subunit rDNA sequences of 42 taxa belonging to 10 genera were used to infer phylogenetic relationships among euglenoids. Members of the phototrophic genera Euglena, Phacus, Lepocinclis, Colacium, Trachelomonas, and Strombomonas plus the osmotrophs Astasia longa, Khawkinea quartana, and Hyalophacus ocellatus were included. Six major clades were found in most trees using multiple methods. The utility of Bayesian analyses in resolving these clades is demonstrated. The genus Phacus was polyphyletic with taxa sorting into two main clades. The two clades correlated with overall morphology and corresponded in large part to the previously defined sections, Pleuraspis Pochmann and Proterophacus Pochmann. Euglena was also polyphyletic and split into two clades. In Bayesian analyses species with less plastic pellicles and small disk-like chloroplasts diverged at the base of the tree. They grouped into a single clade which included the two Lepocinclis spp., which also are rigid and bear similar chloroplasts. The metabolic Euglena species with larger plastids bearing pyrenoids and paramylon caps arose near the top of the tree. The loricates Strombomonas and Trachelomonas formed two well-supported, but paraphyletic, clades. The strong support for the individual clades confirmed the value of using lorica features as taxonomic criteria. The separation of the osmotrophic species A. longa, K. quartana, and H. ocellatus into different clades suggested that the loss of the photosynthetic ability has occurred multiple times. Fil:Nudelman, M.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Rossi, M.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Conforti, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00223646_v39_n1_p226_Nudelman
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Euglenoids
Euglenophyta
Euglenozoa
Molecular phylogeny
SSU rDNA
flagellate
phylogeny
taxonomy
algae
Astasia
Colacium
Euglena
Euglena longa
Euglenida
Euglenozoa
Eukaryota
Hyalophacus ocellatus
Khawkinea quartana
Lepocinclis
Lorica
Mastigophora (flagellates)
Phacus
Strombomonas
Trachelomonas
spellingShingle Euglenoids
Euglenophyta
Euglenozoa
Molecular phylogeny
SSU rDNA
flagellate
phylogeny
taxonomy
algae
Astasia
Colacium
Euglena
Euglena longa
Euglenida
Euglenozoa
Eukaryota
Hyalophacus ocellatus
Khawkinea quartana
Lepocinclis
Lorica
Mastigophora (flagellates)
Phacus
Strombomonas
Trachelomonas
Nudelman, M.A.
Rossi, M.S.
Conforti, V.
Triemer, R.E.
Phylogeny of Euglenophyceae based on small subunit rDNA sequences: Taxonomic implications
topic_facet Euglenoids
Euglenophyta
Euglenozoa
Molecular phylogeny
SSU rDNA
flagellate
phylogeny
taxonomy
algae
Astasia
Colacium
Euglena
Euglena longa
Euglenida
Euglenozoa
Eukaryota
Hyalophacus ocellatus
Khawkinea quartana
Lepocinclis
Lorica
Mastigophora (flagellates)
Phacus
Strombomonas
Trachelomonas
description Small subunit rDNA sequences of 42 taxa belonging to 10 genera were used to infer phylogenetic relationships among euglenoids. Members of the phototrophic genera Euglena, Phacus, Lepocinclis, Colacium, Trachelomonas, and Strombomonas plus the osmotrophs Astasia longa, Khawkinea quartana, and Hyalophacus ocellatus were included. Six major clades were found in most trees using multiple methods. The utility of Bayesian analyses in resolving these clades is demonstrated. The genus Phacus was polyphyletic with taxa sorting into two main clades. The two clades correlated with overall morphology and corresponded in large part to the previously defined sections, Pleuraspis Pochmann and Proterophacus Pochmann. Euglena was also polyphyletic and split into two clades. In Bayesian analyses species with less plastic pellicles and small disk-like chloroplasts diverged at the base of the tree. They grouped into a single clade which included the two Lepocinclis spp., which also are rigid and bear similar chloroplasts. The metabolic Euglena species with larger plastids bearing pyrenoids and paramylon caps arose near the top of the tree. The loricates Strombomonas and Trachelomonas formed two well-supported, but paraphyletic, clades. The strong support for the individual clades confirmed the value of using lorica features as taxonomic criteria. The separation of the osmotrophic species A. longa, K. quartana, and H. ocellatus into different clades suggested that the loss of the photosynthetic ability has occurred multiple times.
format JOUR
author Nudelman, M.A.
Rossi, M.S.
Conforti, V.
Triemer, R.E.
author_facet Nudelman, M.A.
Rossi, M.S.
Conforti, V.
Triemer, R.E.
author_sort Nudelman, M.A.
title Phylogeny of Euglenophyceae based on small subunit rDNA sequences: Taxonomic implications
title_short Phylogeny of Euglenophyceae based on small subunit rDNA sequences: Taxonomic implications
title_full Phylogeny of Euglenophyceae based on small subunit rDNA sequences: Taxonomic implications
title_fullStr Phylogeny of Euglenophyceae based on small subunit rDNA sequences: Taxonomic implications
title_full_unstemmed Phylogeny of Euglenophyceae based on small subunit rDNA sequences: Taxonomic implications
title_sort phylogeny of euglenophyceae based on small subunit rdna sequences: taxonomic implications
url http://hdl.handle.net/20.500.12110/paper_00223646_v39_n1_p226_Nudelman
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AT rossims phylogenyofeuglenophyceaebasedonsmallsubunitrdnasequencestaxonomicimplications
AT confortiv phylogenyofeuglenophyceaebasedonsmallsubunitrdnasequencestaxonomicimplications
AT triemerre phylogenyofeuglenophyceaebasedonsmallsubunitrdnasequencestaxonomicimplications
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