Taxonomic revision of Dictyosiphon (Ectocarpales s.l ., Phaeophyceae) from the north-western Pacific, with descriptions of D. asiaticus sp. nov. and D. sparsus sp. nov
Dictyosiphon asiaticus sp. nov. and D. sparsus sp. nov. are newly described from Japan and the north-western Pacific. Molecular phylogenies based on the mitochondrial cox 1 and cox 3 and chloroplast atp B, psa A, psb A and rbc L DNA sequences revealed that Dictyosiphon comprises at least seven linea...
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ftsmithonian:oai:figshare.com:article/16574349 2023-05-15T15:15:01+02:00 Taxonomic revision of Dictyosiphon (Ectocarpales s.l ., Phaeophyceae) from the north-western Pacific, with descriptions of D. asiaticus sp. nov. and D. sparsus sp. nov Hiroshi Kawai (3157476) Takeaki Hanyuda (6882080) Qian Cheng (285039) Kathy Ann Miller (2917721) Akira F. Peters (8027270) 2021-09-06T13:40:33Z https://doi.org/10.6084/m9.figshare.16574349.v1 unknown https://figshare.com/articles/dataset/Taxonomic_revision_of_i_Dictyosiphon_i_Ectocarpales_i_s_l_i_Phaeophyceae_from_the_north-western_Pacific_with_descriptions_of_i_D_asiaticus_i_sp_nov_and_i_D_sparsus_i_sp_nov/16574349 doi:10.6084/m9.figshare.16574349.v1 CC BY 4.0 CC-BY Biochemistry Genetics Molecular Biology Evolutionary Biology Ecology Inorganic Chemistry Plant Biology Environmental Sciences not elsewhere classified Biological Sciences not elsewhere classified Dicytosiphon D. asiaticus D. sinicola D. sparsus molecular phylogeny taxonomy Dataset 2021 ftsmithonian https://doi.org/10.6084/m9.figshare.16574349.v1 2021-12-20T02:49:52Z Dictyosiphon asiaticus sp. nov. and D. sparsus sp. nov. are newly described from Japan and the north-western Pacific. Molecular phylogenies based on the mitochondrial cox 1 and cox 3 and chloroplast atp B, psa A, psb A and rbc L DNA sequences revealed that Dictyosiphon comprises at least seven lineages worldwide. Japanese Dicytosiphon species formed two clades with high support and were sister to a clade including specimens from the cold-water regions of the northern Pacific, the Arctic, and the north-western Atlantic. Specimens of one of the Japanese clades (= D. asiaticus sp. nov.) were morphologically similar to D. foeniculaceus (generitype described from Scotland, UK), having densely branched thalli with fine branches, and were epiphytic on Scytosiphon spp. and Chordaria spp. Specimens of the other Japanese clade (= D. sparsus sp. nov.) were morphologically similar to D. chordaria , having somewhat thicker, sparse branches with blunt tips, and were epiphytic on Chordaria spp. We assign the third clade distributed on both sides of the North Pacific to D. sinicola , which was described from Washington, USA, for the following reasons: Dictyosiphon specimens in the region having relatively densely branched thalli with fine tips have been identified as D. foeniculaceus , and D. sinicola was distinguished from them by its remarkably larger thallus, while anatomically they are very similar. However, D. foeniculaceus is not widely distributed in the region, with only one genetic lineage (species) reported, so that those two taxa are considered to be ecotypes of the same species, and D. sinicola is the valid name for the taxon. Dataset Arctic Unknown Arctic Pacific |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftsmithonian |
language |
unknown |
topic |
Biochemistry Genetics Molecular Biology Evolutionary Biology Ecology Inorganic Chemistry Plant Biology Environmental Sciences not elsewhere classified Biological Sciences not elsewhere classified Dicytosiphon D. asiaticus D. sinicola D. sparsus molecular phylogeny taxonomy |
spellingShingle |
Biochemistry Genetics Molecular Biology Evolutionary Biology Ecology Inorganic Chemistry Plant Biology Environmental Sciences not elsewhere classified Biological Sciences not elsewhere classified Dicytosiphon D. asiaticus D. sinicola D. sparsus molecular phylogeny taxonomy Hiroshi Kawai (3157476) Takeaki Hanyuda (6882080) Qian Cheng (285039) Kathy Ann Miller (2917721) Akira F. Peters (8027270) Taxonomic revision of Dictyosiphon (Ectocarpales s.l ., Phaeophyceae) from the north-western Pacific, with descriptions of D. asiaticus sp. nov. and D. sparsus sp. nov |
topic_facet |
Biochemistry Genetics Molecular Biology Evolutionary Biology Ecology Inorganic Chemistry Plant Biology Environmental Sciences not elsewhere classified Biological Sciences not elsewhere classified Dicytosiphon D. asiaticus D. sinicola D. sparsus molecular phylogeny taxonomy |
description |
Dictyosiphon asiaticus sp. nov. and D. sparsus sp. nov. are newly described from Japan and the north-western Pacific. Molecular phylogenies based on the mitochondrial cox 1 and cox 3 and chloroplast atp B, psa A, psb A and rbc L DNA sequences revealed that Dictyosiphon comprises at least seven lineages worldwide. Japanese Dicytosiphon species formed two clades with high support and were sister to a clade including specimens from the cold-water regions of the northern Pacific, the Arctic, and the north-western Atlantic. Specimens of one of the Japanese clades (= D. asiaticus sp. nov.) were morphologically similar to D. foeniculaceus (generitype described from Scotland, UK), having densely branched thalli with fine branches, and were epiphytic on Scytosiphon spp. and Chordaria spp. Specimens of the other Japanese clade (= D. sparsus sp. nov.) were morphologically similar to D. chordaria , having somewhat thicker, sparse branches with blunt tips, and were epiphytic on Chordaria spp. We assign the third clade distributed on both sides of the North Pacific to D. sinicola , which was described from Washington, USA, for the following reasons: Dictyosiphon specimens in the region having relatively densely branched thalli with fine tips have been identified as D. foeniculaceus , and D. sinicola was distinguished from them by its remarkably larger thallus, while anatomically they are very similar. However, D. foeniculaceus is not widely distributed in the region, with only one genetic lineage (species) reported, so that those two taxa are considered to be ecotypes of the same species, and D. sinicola is the valid name for the taxon. |
format |
Dataset |
author |
Hiroshi Kawai (3157476) Takeaki Hanyuda (6882080) Qian Cheng (285039) Kathy Ann Miller (2917721) Akira F. Peters (8027270) |
author_facet |
Hiroshi Kawai (3157476) Takeaki Hanyuda (6882080) Qian Cheng (285039) Kathy Ann Miller (2917721) Akira F. Peters (8027270) |
author_sort |
Hiroshi Kawai (3157476) |
title |
Taxonomic revision of Dictyosiphon (Ectocarpales s.l ., Phaeophyceae) from the north-western Pacific, with descriptions of D. asiaticus sp. nov. and D. sparsus sp. nov |
title_short |
Taxonomic revision of Dictyosiphon (Ectocarpales s.l ., Phaeophyceae) from the north-western Pacific, with descriptions of D. asiaticus sp. nov. and D. sparsus sp. nov |
title_full |
Taxonomic revision of Dictyosiphon (Ectocarpales s.l ., Phaeophyceae) from the north-western Pacific, with descriptions of D. asiaticus sp. nov. and D. sparsus sp. nov |
title_fullStr |
Taxonomic revision of Dictyosiphon (Ectocarpales s.l ., Phaeophyceae) from the north-western Pacific, with descriptions of D. asiaticus sp. nov. and D. sparsus sp. nov |
title_full_unstemmed |
Taxonomic revision of Dictyosiphon (Ectocarpales s.l ., Phaeophyceae) from the north-western Pacific, with descriptions of D. asiaticus sp. nov. and D. sparsus sp. nov |
title_sort |
taxonomic revision of dictyosiphon (ectocarpales s.l ., phaeophyceae) from the north-western pacific, with descriptions of d. asiaticus sp. nov. and d. sparsus sp. nov |
publishDate |
2021 |
url |
https://doi.org/10.6084/m9.figshare.16574349.v1 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
https://figshare.com/articles/dataset/Taxonomic_revision_of_i_Dictyosiphon_i_Ectocarpales_i_s_l_i_Phaeophyceae_from_the_north-western_Pacific_with_descriptions_of_i_D_asiaticus_i_sp_nov_and_i_D_sparsus_i_sp_nov/16574349 doi:10.6084/m9.figshare.16574349.v1 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.16574349.v1 |
_version_ |
1766345401153093632 |