FN Archimer Export Format PT J TI Large scale diversity reassessment, evolutionary history, and taxonomic revision of the green macroalgae family Udoteaceae (Bryopsidales, Chlorophyta) BT AF Lagourgue, Laura Payri, Claude E. AS 1:1,2;2:2; FF 1:;2:; C1 Sorbonne Universités UPMC Univ Paris 06, IFD, 4 Place Jussieu, 75252 Paris Cedex 05, France UMR ENTROPIE (IRD, UR, UNC, CNRS, IFREMER), Institut de Recherche pour le Développement, B.P. A5 Nouméa Cedex Nouvelle‐Calédonie 98848, France C2 UNIV SORBONNE, FRANCE IRD, FRANCE UM ENTROPIE IN WOS Cotutelle UMR copubli-france copubli-univ-france IF 3.7 TC 6 UR https://archimer.ifremer.fr/doc/00665/77719/79818.pdf LA English DT Article CR ATIMO VATAE BSM-FIDJI BSM-LOYAUTE CHEST CORALCAL-2 CORALCAL-4 KAVIENG MAD MADANG 2012 PACOTILLES-1 PRISTINE 02 SANTO 2006 BO Antea Alis DE ;Chlorophyta;macroalgae;phylogeny;species delimitation;trait evolution AB Udoteaceae is a morphologically diverse family of the order Bryopsidales. Despite being very widespread geographically, this family is little known compared to the closely related Halimedaceae or Caulerpaceae. Using the most extensive Udoteaceae collection to date and a multilocus genetic dataset (tufA, rbcL and 18S rDNA), we reassessed the species diversity of the family, as well as the phylogenetic relationships, the diagnostic morpho‐anatomical characters and evolutionary history of its genera, toward a proposed taxonomic revision. Our approach included a combination of molecular and morphological criteria, including species delimitation methods, phylogenetic reconstruction and mapping of trait evolution. We successfully delimited 62 species hypotheses, of which 29 were assigned (existing) species names and 13 represent putative new species. Our results also led us to revise the genera Udotea s.s., Rhipidosiphon s.s. and Chlorodesmis s.s., to validate the genus Rhipidodesmis and to propose three new genera: Glaukea gen. nov., Ventalia gen. nov., and Udoteopsis gen. nov. We also identified two large species complexes, which we refer to as the “Penicillus‐Rhipidosiphon‐Rhipocephalus‐Udotea complex” and the “Poropsis‐Penicillus‐Rhipidodesmis complex”. Using a time‐calibrated phylogeny, we estimated the origin of the family Udoteaceae at Late Triassic (ca 216 Ma), whereas most of the genera originated during Paleogene. Our morphological inference results indicated that the thallus of the Udoteaceae ancestor was likely entirely corticated and calcified, composed of a creeping axis with a multisiphonous stipe and a pluristromatic flabellate frond. The frond shape, cortication and calcification are still symplesiomorphies for most extant Udoteaceae genera and represent useful diagnostic characters. PY 2022 PD JAN SO Journal Of Systematics And Evolution SN 1674-4918 PU Wiley VL 60 IS 1 UT 000641333400001 BP 101 EP 127 DI 10.1111/jse.12716 ID 77719 ER EF