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      Two new species and two new records of Artabotrys (Annonaceae) from Thailand

      research-article
      Author(s): 1 , , 1
      Publication date (Electronic):
      Journal: PhytoKeys
      Publisher: Pensoft Publishers
      Keywords: Annonaceae, Artabotrys, new records, new species, Thailand

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          Abstract

          Abstract

          Two new species of Artabotrys are described from Thailand. Artabotrys tanaosriensis J.Chen, Chalermglin & R.M.K.Saunders, sp. nov., is similar to A. oblanceolatus Craib but differs in its symmetrical, cuneate or decurrent leaf base, externally distinct outer petal blades and claws, deltoid and undulate outer petal blades, rhomboid and undulate inner petal blades and shorter, subsessile and slightly beaked monocarps. Artabotrys spathulatus J.Chen, Chalermglin & R.M.K.Saunders, sp. nov., is most similar to A. tanaosriensis but differs in having flat outer petal blades, broadly rhomboid outer petal claws, broadly spathulate and strongly concave inner petal blades and strongly beaked monocarps. Two new records for the Flora of Thailand are furthermore reported here: A. punctulatus C.Y.Wu ex S.H.Yuan and A. byrsophyllus I.M.Turner & Utteridge, which were previously confused with A. aeneus Ast and A. grandifolius King, respectively. A key to Artabotrys species indigenous to Thailand is provided here.

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          The nature of plant species.

          Marie Wood, Loren H Rieseberg, Eric Baack (2006)
          Many botanists doubt the existence of plant species, viewing them as arbitrary constructs of the human mind, as opposed to discrete, objective entities that represent reproductively independent lineages or 'units of evolution'. However, the discreteness of plant species and their correspondence with reproductive communities have not been tested quantitatively, allowing zoologists to argue that botanists have been overly influenced by a few 'botanical horror stories', such as dandelions, blackberries and oaks. Here we analyse phenetic and/or crossing relationships in over 400 genera of plants and animals. We show that although discrete phenotypic clusters exist in most genera (> 80%), the correspondence of taxonomic species to these clusters is poor (< 60%) and no different between plants and animals. Lack of congruence is caused by polyploidy, asexual reproduction and over-differentiation by taxonomists, but not by contemporary hybridization. Nonetheless, crossability data indicate that 70% of taxonomic species and 75% of phenotypic clusters in plants correspond to reproductively independent lineages (as measured by postmating isolation), and thus represent biologically real entities. Contrary to conventional wisdom, plant species are more likely than animal species to represent reproductively independent lineages.
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            A mega-phylogeny of the Annonaceae: taxonomic placement of five enigmatic genera and support for a new tribe, Phoenicantheae

            Xing Guo, Chin Tang, Daniel C Thomas … (2017)
            The Annonaceae, the largest family in the early-divergent order Magnoliales, comprises 107 genera and c. 2,400 species. Previous molecular phylogenetic studies targeting different taxa have generated large quantities of partially overlapping DNA sequence data for many species, although a large-scale phylogeny based on the maximum number of representatives has never been reconstructed. We use a supermatrix of eight chloroplast markers (rbcL, matK, ndhF, psbA-trnH, trnL-F, atpB-rbcL, trnS-G and ycf1) to reconstruct the most comprehensive tree to date, including 705 species (29%) from 105 genera (98%). This provides novel insights into the relationships of five enigmatic genera (Bocagea, Boutiquea, Cardiopetalum, Duckeanthus and Phoenicanthus). Fifteen main clades are retrieved in subfamilies Annonoideae and Malmeoideae collectively, 14 of which correspond with currently recognised tribes. Phoenicanthus cannot be accommodated in any existing tribe, however: it is retrieved as sister to a clade comprising the tribes Dendrokingstonieae, Monocarpieae and Miliuseae, and we therefore validate a new tribe, Phoenicantheae. Our results provide strong support for many previously recognised groups, but also indicate non-monophyly of several genera (Desmopsis, Friesodielsia, Klarobelia, Oxandra, Piptostigma and Stenanona). The relationships of these non-monophyletic genera—and two other genera (Froesiodendron and Melodorum) not yet sampled—are discussed, with recommendations for future research.
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              Thorn and Hook Ontogeny in Artabotrys hexapetalus (Annonaceae)

              Usher Posluszny, Jack B Fisher (2000)
              Article 0 comments Cited 7 times – based on 0 reviews     Review now
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                Author and article information

                Journal
                Journal ID (nlm-ta): PhytoKeys
                Journal ID (iso-abbrev): PhytoKeys
                Journal ID (publisher-id): PhytoKeys
                Title: PhytoKeys
                Publisher: Pensoft Publishers
                ISSN (Print): 1314-2011
                ISSN (Electronic): 1314-2003
                Publication date Collection: 2018
                Publication date (Electronic): 7 February 2018
                Issue: 95
                Pages: 71-81
                Affiliations
                [1 ] School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
                [2 ] Agricultural Technology Department, Thailand Institute of Scientific & Technological Research, 35 Technopolis, Liap Khlong Ha Road, Khlong Luang District, Pathum Thani Province 12120, Thailand
                Author notes
                Corresponding author: Richard M.K. Saunders ( saunders@ 123456hku.hk )

                Academic editor: T. Couvreur

                Article
                DOI: 10.3897/phytokeys.95.23434
                PMC ID: 5904332
                SO-VID: b9373747-fdb5-44ce-99f8-cf2bdc68a89d
                Copyright © Junhao Chen, Piya Chalermglin, Richard M.K. Saunders
                License:

                This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                History
                Date received : 5 January 2018
                Date accepted : 23 January 2018
                Funding
                Hong Kong Research Grants Council
                Categories
                Subject: Research Article

                ScienceOpen disciplines: Plant science & Botany
                Keywords: annonaceae,artabotrys,new records,new species,thailand,plantae,magnoliales
                Data availability:
                ScienceOpen disciplines: Plant science & Botany
                Keywords: annonaceae, artabotrys, new records, new species, thailand, plantae, magnoliales

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