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 ...

• Main Authors: Kawai, Hiroshi, Hanyuda, Takeaki, Cheng, Qian, Miller, Kathy Ann, Peters, Akira F.
• Format: Dataset
• Language: unknown
• Published: Taylor & Francis 2022
• Subjects: Biochemistry; Genetics; FOS Biological sciences; Molecular Biology; Evolutionary Biology; Environmental Sciences not elsewhere classified; Ecology; Biological Sciences not elsewhere classified; Inorganic Chemistry; FOS Chemical sciences; Plant Biology; Arctic; Pacific
• Online Access: https://dx.doi.org/10.6084/m9.figshare.16574349.v2; https://tandf.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/16574349/2

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 ...