J Syst Evol ›› 2021, Vol. 59 ›› Issue (4): 852-895.DOI: 10.1111/jse.12757

• Research Articles • Previous Articles    

A new classification of Cyperaceae (Poales) supported by phylogenomic data

Isabel Larridon1,2*, Alexandre R. Zuntini1, Étienne Léveillé‐Bourret3, Russell L. Barrett4, Julian R. Starr5, A. Muthama Muasya1,6, Tamara Villaverde7, Kenneth Bauters8, Grace E. Brewer1, Jeremy J. Bruhl9, Suzana M. Costa10, Tammy L. Elliott11, Niroshini Epitawalage1, Marcial Escudero12, Isabel Fairlie1,13, Paul Goetghebeur2, Andrew L. Hipp14,15, Pedro Jiménez‐Mejías16,17, Izai A.B. Sabino Kikuchi1,18, Modesto Luceño19, José Ignacio Márquez‐Corro19, Santiago Martín‐Bravo19, Olivier Maurin1, Lisa Pokorny1,20, Eric H. Roalson21, Ilias Semmouri22, David A. Simpson1,23, Daniel Spalink24, W. Wayt Thomas25, Karen L. Wilson4, Martin Xanthos1, Félix Forest1, and William J. Baker1   

  1. 1Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3AE, UK
    2Systematic and Evolutionary Botany Lab, Department of Biology, Ghent University, K.L. Ledeganckstraat 35, 9000 Ghent, Belgium
    3Institut de recherche en biologie végétale (IRBV), Université de Montréal, Montréal, QC H1X 2B2, Canada
    4National Herbarium of New South Wales, Royal Botanic Gardens, Mrs Macquaries Road, Sydney, Sydney, NSW 2000, Australia
    5Department of Biology, University of Ottawa, Ottawa, ON K1N 6N5, Canada
    6Department of Biological Sciences, University of Cape Town, Bolus Herbarium, Private Bag X3, Rondebosch, 7701 Cape Town, South Africa
    7Universidad de Almería, Carretera Sacramento s/n, La Cañada de San Urbano, Almería 04120, Spain
    8Botanic Garden Meise, Nieuwelaan 38, Meise 1860, Belgium
    9Botany, School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia
    10Departamento de Biologia, Universidade Federal de Lavras, Caixa Postal 3037, Lavras, Minas Gerais CEP 37200‐000, Brazil
    11Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlarska 2, Brno 611 37, Czech Republic
    12Departamento de Biología Vegetal y Ecología, Universidad de Sevilla, Carretera Profesor García González s/n, Seville 41012, Spain
    13Department of Animal and Plant Sciences, Univeristy of Sheffield, Alfred Denny Building, Western Bank, Sheffield S10 2TN, UK
    14The Morton Arboretum, 4100 Illinois Route 53, Lisle, IL 60532‐1293, USA
    15The Field Museum, 1400S. Lake Shore Dr., Chicago, IL 60605, USA
    16Departamento de Biología (Botánica), Facultad de Ciencias Biológicas, Universidad Autónoma de Madrid, C/Darwin, 2, 28049 Madrid, Spain
    17Centro de Investigación en Biodiversidad y Cambio Global (CIBC‐UAM), Universidad Autónoma de Madrid, 28049 Madrid, Spain
    18Hortus Botanicus Leiden, Universiteit Leiden, PO Box 9500, Leiden 2300 RA, The Netherlands
    19Department of Molecular Biology and Biochemical Engineering, Botany area, Universidad Pablo de Olavide, Carretera de Utrera km 1, 41013 Seville, Spain
    20Centre for Plant Biotechnology and Genomics (CBGP, UPM‐INIA), Pozuelo de Alarcón, Madrid 28223, Spain
    21School of Biological Sciences, Washington State University, Pullman, WA 99164‐4236, USA
    22Laboratory of Environmental Toxicology and Aquatic Ecology, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium
    23Department of Botany, School of Natural Sciences, Trinity College Dublin, Dublin 2, Ireland
    24Department of Ecology and Conservation Biology, Texas A&M University, College Station, TX 77843, USA
    25The New York Botanical Garden, 2900 Southern Blvd, Bronx, NY 10458, USA
  • Received:2020-09-30 Accepted:2021-05-03 Online:2021-05-08 Published:2021-07-01

Abstract: Cyperaceae (sedges) are the third largest monocot family and are of considerable economic and ecological importance. Sedges represent an ideal model family to study evolutionary biology due to their species richness, global distribution, large discrepancies in lineage diversity, broad range of ecological preferences, and adaptations including multiple origins of C4 photosynthesis and holocentric chromosomes. Goetghebeur′s seminal work on Cyperaceae published in 1998 provided the most recent complete classification at tribal and generic level, based on a morphological study of Cyperaceae inflorescence, spikelet, flower, and embryo characters, plus anatomical and other information. Since then, several family-level molecular phylogenetic studies using Sanger sequence data have been published. Here, more than 20 years after the last comprehensive classification of the family, we present the first family-wide phylogenomic study of Cyperaceae based on targeted sequencing using the Angiosperms353 probe kit sampling 311 accessions. In addition, 62 accessions available from GenBank were mined for overlapping reads and included in the phylogenomic analyses. Informed by this backbone phylogeny, a new classification for the family at the tribal, subtribal, and generic levels is proposed. The majority of previously recognized suprageneric groups are supported, and for the first time, we establish support for tribe Cryptangieae as a clade including the genus Koyamaea. We provide a taxonomic treatment including identification keys and diagnoses for the 2 subfamilies, 24 tribes, and 10 subtribes, and basic information on the 95 genera. The classification includes five new subtribes in tribe Schoeneae: Anthelepidinae, Caustiinae, Gymnoschoeninae, Lepidospermatinae, and Oreobolinae.

Key words: Angiosperms353, classification, Cyperaceae, phylogenomics, Poales, systematics, targeted sequencing, taxonomy