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Hwan Su Yoon - One of the best experts on this subject based on the ideXlab platform.
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A Re-investigation of Sarcinochrysis marina (Sarcinochrysidales, Pelagophyceae) from its Type Locality and the Descriptions of Arachnochrysis, Pelagospilus, Sargassococcus and Sungminbooa genera nov.
Protist, 2018Co-Authors: Kwi Young Han, Robert A Andersen, Louis Graf, Carolina Perez Reyes, Barbara Melkonian, Hwan Su Yoon, Michael MelkonianAbstract:Systematists increasingly use molecular markers to identify species; however, most microalgae were described before gene sequencing and Type specimens were often ink drawings. Cryptic speciation and biogeographic isolation are other potential problems when anchoring an old species name with a modern gene sequence. Therefore when biological Type material is absent, the best approach is to recollect the alga from the Type Locality and sequence genes. Sarcinochrysis marina, described in 1930 by Geitler from the Canary Islands, Spain, is the oldest Pelagophyceae genus. Geitler used two cultures in his study, but these cultures no longer exist. We re-isolated S. marina from the Type Locality near Las Palmas, Gran Canaria. Furthermore, we included additional Pelagophyceae strains that were isolated from natural habitats for this study or were obtained from culture collections. We produced 85 sequences, representing the nuclear-encoded SSU rRNA and the plastid-encoded rbcL, psaA, psaB, psbA, and psbC genes. The sequences were used to infer maximum likelihood phylogenetic trees. We anchored the name Sarcinochrysis marina using the Las Palmas isolate, and we described four new genera (Arachnochrysis, Pelagospilus, Sargassococcus, Sungminbooa) and nine new species in the Sarcinochrysidales. We also described a new family, Chrysocystaceae, based upon molecular phylogenetic analyses.
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A Re-investigation of Sarcinochrysis marina (Sarcinochrysidales, Pelagophyceae) from its Type Locality and the Descriptions of Arachnochrysis, Pelagospilus, Sargassococcus and Sungminbooa genera nov.
'Elsevier BV', 2018Co-Authors: Han, Kwi Young, Hwan Su Yoon, Graf Louis, Reyes, Carolina P., Melkonian Barbara, Andersen, Robert A., Melkonian MichaelAbstract:Systematists increasingly use molecular markers to identify species; however, most microalgae were described before gene sequencing and Type specimens were often ink drawings. Cryptic speciation and biogeographic isolation are other potential problems when anchoring an old species name with a modern gene sequence. Therefore when biological Type material is absent, the best approach is to recollect the alga from the Type Locality and sequence genes. Sarcinochrysis marina, described in 1930 by Geitler from the Canary Islands, Spain, is the oldest Pelagophyceae genus. Geitler used two cultures in his study, but these cultures no longer exist. We re-isolated S. marina from the Type Locality near Las Palmas, Gran Canaria. Furthermore, we included additional Pelagophyceae strains that were isolated from natural habitats for this study or were obtained from culture collections. We produced 85 sequences, representing the nuclear-encoded SSU rRNA and the plastid-encoded rbcL, psaA, psaB, psbA, and psbC genes. The sequences were used to infer maximum likelihood phylogenetic trees. We anchored the name Sarcinochrysis marina using the Las Palmas isolate, and we described four new genera (Arachnochrysis, Pelagospilus, Sargassococcus, Sungminbooa) and nine new species in the Sarcinochrysidales. We also described a new family, Chrysocystaceae, based upon molecular phylogenetic analyses. (C) 2018 Elsevier GmbH. All rights reserved
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A re-investigation of Chrysotila (Prymnesiophyceae) using material collected from the Type Locality
Phycologia, 2014Co-Authors: Robert A Andersen, Jong Im Kim, Ian Tittley, Hwan Su YoonAbstract:We isolated 17 strains of Chrysotila stipitata and 10 strains of Chrysotila lamellosa from samples collected at exposed chalk surfaces, Westgate, Kent, England, which is the Type Locality for C. stipitata (generiType) and C. lamellosa. The nuclear-encoded small subunit and large subunit rRNA were used in a molecular phylogenetic analysis. We also examined the cells using light microscopy. Chrysotila stipitata had two chloroplasts per cell, as originally described, and it was positioned within the Coccolithales (Prymnesiophyceae) in a RAxML tree. Chrysotila stipitata gene sequences formed a clade with Pleurochrysis, and because Chrysotila has priority, Pleurochrysis was placed in synonymy. New nomenclatural combinations were also made. Chrysotila lamellosa was located within the order Isochrysidales, and like other members of the order, C. lamellosa had one chloroplast per cell. We reinstated the generic name Ruttnera to accommodate this species (Ruttnera lamellosa comb. nov.). We also showed that several ...
Michael Melkonian - One of the best experts on this subject based on the ideXlab platform.
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A Re-investigation of Sarcinochrysis marina (Sarcinochrysidales, Pelagophyceae) from its Type Locality and the Descriptions of Arachnochrysis, Pelagospilus, Sargassococcus and Sungminbooa genera nov.
Protist, 2018Co-Authors: Kwi Young Han, Robert A Andersen, Louis Graf, Carolina Perez Reyes, Barbara Melkonian, Hwan Su Yoon, Michael MelkonianAbstract:Systematists increasingly use molecular markers to identify species; however, most microalgae were described before gene sequencing and Type specimens were often ink drawings. Cryptic speciation and biogeographic isolation are other potential problems when anchoring an old species name with a modern gene sequence. Therefore when biological Type material is absent, the best approach is to recollect the alga from the Type Locality and sequence genes. Sarcinochrysis marina, described in 1930 by Geitler from the Canary Islands, Spain, is the oldest Pelagophyceae genus. Geitler used two cultures in his study, but these cultures no longer exist. We re-isolated S. marina from the Type Locality near Las Palmas, Gran Canaria. Furthermore, we included additional Pelagophyceae strains that were isolated from natural habitats for this study or were obtained from culture collections. We produced 85 sequences, representing the nuclear-encoded SSU rRNA and the plastid-encoded rbcL, psaA, psaB, psbA, and psbC genes. The sequences were used to infer maximum likelihood phylogenetic trees. We anchored the name Sarcinochrysis marina using the Las Palmas isolate, and we described four new genera (Arachnochrysis, Pelagospilus, Sargassococcus, Sungminbooa) and nine new species in the Sarcinochrysidales. We also described a new family, Chrysocystaceae, based upon molecular phylogenetic analyses.
Kwi Young Han - One of the best experts on this subject based on the ideXlab platform.
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A Re-investigation of Sarcinochrysis marina (Sarcinochrysidales, Pelagophyceae) from its Type Locality and the Descriptions of Arachnochrysis, Pelagospilus, Sargassococcus and Sungminbooa genera nov.
Protist, 2018Co-Authors: Kwi Young Han, Robert A Andersen, Louis Graf, Carolina Perez Reyes, Barbara Melkonian, Hwan Su Yoon, Michael MelkonianAbstract:Systematists increasingly use molecular markers to identify species; however, most microalgae were described before gene sequencing and Type specimens were often ink drawings. Cryptic speciation and biogeographic isolation are other potential problems when anchoring an old species name with a modern gene sequence. Therefore when biological Type material is absent, the best approach is to recollect the alga from the Type Locality and sequence genes. Sarcinochrysis marina, described in 1930 by Geitler from the Canary Islands, Spain, is the oldest Pelagophyceae genus. Geitler used two cultures in his study, but these cultures no longer exist. We re-isolated S. marina from the Type Locality near Las Palmas, Gran Canaria. Furthermore, we included additional Pelagophyceae strains that were isolated from natural habitats for this study or were obtained from culture collections. We produced 85 sequences, representing the nuclear-encoded SSU rRNA and the plastid-encoded rbcL, psaA, psaB, psbA, and psbC genes. The sequences were used to infer maximum likelihood phylogenetic trees. We anchored the name Sarcinochrysis marina using the Las Palmas isolate, and we described four new genera (Arachnochrysis, Pelagospilus, Sargassococcus, Sungminbooa) and nine new species in the Sarcinochrysidales. We also described a new family, Chrysocystaceae, based upon molecular phylogenetic analyses.
Robert A Andersen - One of the best experts on this subject based on the ideXlab platform.
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A Re-investigation of Sarcinochrysis marina (Sarcinochrysidales, Pelagophyceae) from its Type Locality and the Descriptions of Arachnochrysis, Pelagospilus, Sargassococcus and Sungminbooa genera nov.
Protist, 2018Co-Authors: Kwi Young Han, Robert A Andersen, Louis Graf, Carolina Perez Reyes, Barbara Melkonian, Hwan Su Yoon, Michael MelkonianAbstract:Systematists increasingly use molecular markers to identify species; however, most microalgae were described before gene sequencing and Type specimens were often ink drawings. Cryptic speciation and biogeographic isolation are other potential problems when anchoring an old species name with a modern gene sequence. Therefore when biological Type material is absent, the best approach is to recollect the alga from the Type Locality and sequence genes. Sarcinochrysis marina, described in 1930 by Geitler from the Canary Islands, Spain, is the oldest Pelagophyceae genus. Geitler used two cultures in his study, but these cultures no longer exist. We re-isolated S. marina from the Type Locality near Las Palmas, Gran Canaria. Furthermore, we included additional Pelagophyceae strains that were isolated from natural habitats for this study or were obtained from culture collections. We produced 85 sequences, representing the nuclear-encoded SSU rRNA and the plastid-encoded rbcL, psaA, psaB, psbA, and psbC genes. The sequences were used to infer maximum likelihood phylogenetic trees. We anchored the name Sarcinochrysis marina using the Las Palmas isolate, and we described four new genera (Arachnochrysis, Pelagospilus, Sargassococcus, Sungminbooa) and nine new species in the Sarcinochrysidales. We also described a new family, Chrysocystaceae, based upon molecular phylogenetic analyses.
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A re-investigation of Chrysotila (Prymnesiophyceae) using material collected from the Type Locality
Phycologia, 2014Co-Authors: Robert A Andersen, Jong Im Kim, Ian Tittley, Hwan Su YoonAbstract:We isolated 17 strains of Chrysotila stipitata and 10 strains of Chrysotila lamellosa from samples collected at exposed chalk surfaces, Westgate, Kent, England, which is the Type Locality for C. stipitata (generiType) and C. lamellosa. The nuclear-encoded small subunit and large subunit rRNA were used in a molecular phylogenetic analysis. We also examined the cells using light microscopy. Chrysotila stipitata had two chloroplasts per cell, as originally described, and it was positioned within the Coccolithales (Prymnesiophyceae) in a RAxML tree. Chrysotila stipitata gene sequences formed a clade with Pleurochrysis, and because Chrysotila has priority, Pleurochrysis was placed in synonymy. New nomenclatural combinations were also made. Chrysotila lamellosa was located within the order Isochrysidales, and like other members of the order, C. lamellosa had one chloroplast per cell. We reinstated the generic name Ruttnera to accommodate this species (Ruttnera lamellosa comb. nov.). We also showed that several ...
Barbara Melkonian - One of the best experts on this subject based on the ideXlab platform.
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A Re-investigation of Sarcinochrysis marina (Sarcinochrysidales, Pelagophyceae) from its Type Locality and the Descriptions of Arachnochrysis, Pelagospilus, Sargassococcus and Sungminbooa genera nov.
Protist, 2018Co-Authors: Kwi Young Han, Robert A Andersen, Louis Graf, Carolina Perez Reyes, Barbara Melkonian, Hwan Su Yoon, Michael MelkonianAbstract:Systematists increasingly use molecular markers to identify species; however, most microalgae were described before gene sequencing and Type specimens were often ink drawings. Cryptic speciation and biogeographic isolation are other potential problems when anchoring an old species name with a modern gene sequence. Therefore when biological Type material is absent, the best approach is to recollect the alga from the Type Locality and sequence genes. Sarcinochrysis marina, described in 1930 by Geitler from the Canary Islands, Spain, is the oldest Pelagophyceae genus. Geitler used two cultures in his study, but these cultures no longer exist. We re-isolated S. marina from the Type Locality near Las Palmas, Gran Canaria. Furthermore, we included additional Pelagophyceae strains that were isolated from natural habitats for this study or were obtained from culture collections. We produced 85 sequences, representing the nuclear-encoded SSU rRNA and the plastid-encoded rbcL, psaA, psaB, psbA, and psbC genes. The sequences were used to infer maximum likelihood phylogenetic trees. We anchored the name Sarcinochrysis marina using the Las Palmas isolate, and we described four new genera (Arachnochrysis, Pelagospilus, Sargassococcus, Sungminbooa) and nine new species in the Sarcinochrysidales. We also described a new family, Chrysocystaceae, based upon molecular phylogenetic analyses.
