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Ligulate Desmarestia (Desmarestiales, Phaeophyceae) revisited: D . japonica sp. nov. and D . dudresnayi differ from D . ligulata
Author(s) -
Yang Eun Chan,
Peters Akira F.,
Kawai Hiroshi,
Stern Rowena,
Hanyuda Takeaki,
Bárbara Ignacio,
Müller Dieter Gerhard,
Strittmatter Martina,
Reine Willem F. Prud'Homme,
Küpper Frithjof C.
Publication year - 2014
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/jpy.12148
Subject(s) - biology , gametophyte , botany , sporophyte , taxonomy (biology) , plant reproductive morphology , saccharina , taxon , algae , laminaria , pollen
The phylogeny of ligulate and sulfuric‐acid containing species of D esmarestia , occurring worldwide from polar to temperate regions, was revised using a multigenic and polyphasic approach. Sequence data, gametophyte characteristics, and sporophyte morphology support reducing a total of 16 taxa to four different species. (1) D . herbacea , containing broad‐bladed and highly branched forms, has dioecious gametophytes. The three other species have monoecious gametophytes: (2) D . ligulata which is profusely branched and, except for one subspecies, narrow‐bladed, (3) J apanese ligulate D esmarestia , here described as D . japonica sp. nov., which is morphologically similar to D . ligulata but genetically distant from all other ligulate taxa. This species may have conserved the morphology of original ligulate D esmarestia . (4) D . dudresnayi, including unbranched or little branched broad‐bladed taxa. A figure of the holotype of D . dudresnayi , which was lost for decades, was relocated. The taxonomy is complemented by a comparison of internal transcribed spacer and cytochrome c oxidase subunit I ( cox 1) as potential barcode loci, with cox 1 offering good resolution, reflecting species delimitations within the genus D esmarestia .