title: A novel phylogeny of the Gelidiales (Rhodophyta) based on five genes including the nuclear CesA, with descriptions of Orthogonacladia gen. nov. and Orthogonacladiaceae fam. nov.
abstract: Although the Gelidiales are economically important marine red algae producing agar and agarose, the phylogeny of this order remains poorly resolved. The present study provides a molecular phylogeny based on a novel marker, nuclear-encoded CesA, plus plastid-encoded psaA, psbA, rbcL, and mitochondria-encoded cox1 from subsets of 107 species from all ten genera within the Gelidiales. Analyses of individual and combined datasets support the monophyly of three currently recognized families, and reveal a new clade. On the basis of these results, the new family Orthogonacladiaceae is described to accommodate Aphanta and a new genus Orthogonacladia that includes species previously classified as Gelidium madagascariense and Pterocladia rectangularis. Acanthopeltis is merged with Gelidium, which has nomenclatural priority. Nuclear-encoded CesA was found to be useful for improving the resolution of phylogenetic relationships within the Gelidiales and is likely to be valuable for the inference of phylogenetic relationship among other red algal taxa.
authors.affiliation: Department of Biology, Chungnam National University, Daejeon 305-764, Republic of Korea. Electronic address: gahunboo@gmail.com.
authors.forename: Ga Hun
authors.initials: GH
authors.lastname: Boo
authors.affiliation: Muséum National d'Histoire Naturelle, Institut de Systématique, Evolution, Biodiversité, UMR 7205 CNRS-EPHE-MNHN-UPMC, Equipe Exploration, Espèces, Evolution, case postale N° 39, 57 rue Cuvier, 75231 Cedex 05 Paris, France.
authors.forename: Line
authors.initials: L
authors.lastname: Le Gall
authors.affiliation: University Herbarium, University of California, 1001 Valley Life Sciences Building #2465, Berkeley, CA 94720, USA.
authors.forename: Kathy Ann
authors.initials: KA
authors.lastname: Miller
authors.affiliation: Center for Marine Science, University of North Carolina at Wilmington, 5600 Marvin Moss Lane, Wilmington, NC 28409, USA.
authors.forename: D Wilson
authors.initials: DW
authors.lastname: Freshwater
authors.affiliation: UWA Oceans Institute & School of Plant Biology, University of Western Australia, Crawley, Western Australia 6009, Australia.
authors.forename: Thomas
authors.initials: T
authors.lastname: Wernberg
authors.affiliation: Faculty of Fisheries, Kagoshima University, Shimoarata 4-50-20, Kagoshima 890-0056, Japan.
authors.forename: Ryuta
authors.initials: R
authors.lastname: Terada
authors.affiliation: Department of Biology, Chungnam National University, Daejeon 305-764, Republic of Korea.
authors.forename: Kyung Ju
authors.initials: KJ
authors.lastname: Yoon
authors.affiliation: Department of Biology, Chungnam National University, Daejeon 305-764, Republic of Korea.
authors.forename: Sung Min
authors.initials: SM
authors.lastname: Boo
mesh_terms: D002467:Cell Nucleus / Q000235:genetics*; D005819:Genetic Markers; D016013:Likelihood Functions; D010802:Phylogeny; D000461:Rhodophyta / Q000033:anatomy & histology / Q000145:classification* / Q000235:genetics*
chemical_list: D005819:Genetic Markers
keywords: CesA; Gelidiales; Multigene analyses; Orthogonacladia; Orthogonacladiaceae