Reassessment of the classification of Bryopsidales (Chlorophyta) based on chloroplast phylogenomic analyses
|Author(s)||Cremen Ma. Chiela M.1, Leliaert Frederik2, 3, West John1, Lam Daryl W.4, 5, Shimada Satoshi, Lopez-Bautista Juan M.4, 5, Verbruggen Heroen1|
|Affiliation(s)||1 : Univ Melbourne, Sch BioSci, Parkville, Vic 3010, Australia.
2 : Bot Garden Meise, B-1860 Meise, Belgium.
3 : Univ Ghent, Dept Biol, Phycol Res Grp, B-9000 Ghent, Belgium.
4 : Univ Alabama, Dept Biol Sci, Tuscaloosa, AL 35487 USA.
5 : Ochanomizu Univ, Nat Sci Div, Fac Core Res, Bunkyo Ku, 2-1-1 Otsuka, Tokyo 1128610, Japan.
|Source||Molecular Phylogenetics And Evolution (1055-7903) (Academic Press Inc Elsevier Science), 2019-01 , Vol. 130 , P. 397-405|
|WOS© Times Cited||17|
|Keyword(s)||Siphonous green algae, Seaweeds, Chloroplast genome, Phylogeny, Ulvophyceae|
The Bryopsidales is a morphologically diverse group of mainly marine green macroalgae characterized by a siphonous structure. The order is composed of three suborders - Ostreobineae, Bryopsidineae, and Halimedineae. While previous studies improved the higher-level classification of the order, the taxonomic placement of some genera in Bryopsidineae (Pseudobryopsis and Lambia) as well as the relationships between the families of Halimedineae remains uncertain. In this study, we re-assess the phylogeny of the order with datasets derived from chloroplast genomes, drastically increasing the taxon sampling by sequencing 32 new chloroplast genomes. The phylogenies presented here provided good support for the major lineages (suborders and most families) in Bryopsidales. In Bryopsidineae, Pseudobryopsis hainanensis was inferred as a distinct lineage from the three established families allowing us to establish the family Pseudobryopsidaceae. The Antarctic species Lambia antarctica was shown to be an early-branching lineage in the family Bryopsidaceae. In Halimedineae, we revealed several inconsistent phylogenetic positions of macroscopic taxa, and several entirely new lineages of microscopic species. A new classification scheme is proposed, which includes the merger of the families Pseudocodiaceae, Rhipiliaceae and Udoteaceae into a more broadly circumscribed Halimedaceae, and the establishment of tribes for the different lineages found therein. In addition, the deep-water genus Johnson-sea-linkia, currently placed in Rhipiliopsis, was reinstated based on our phylogeny.