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      Revisions of Ruizodendron and Pseudephedranthus (Annonaceae) including a new species and an overview of most up-to-date revisions of Neotropical Annonaceae genera

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          Abstract

          Abstract

          We present revisions of the Neotropical genera Ruizodendron and Pseudephedranthus ( Annonaceae ). Ruizodendron includes a single species R. ovale . Pseudephedranthus now comprises two species, with the description of the new species P. enigmaticus sp. nov. extending the range of the genus beyond the Upper Rio Negro region of Brazil (Amazonas) and adjacent Venezuela ( P. fragrans ), to include Guyana, Suriname, and the Brazilian state of Pará. An overview is provided of current revisions of Neotropical Annonaceae genera that will aid in accessing proper species information for this frequently encountered tropical rain forest family.

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          The discovery of the Amazonian tree flora with an updated checklist of all known tree taxa

          Amazonia is the most biodiverse rainforest on Earth, and the debate over how many tree species grow there remains contentious. Here we provide a checklist of all tree species collected to date, and describe spatial and temporal trends in data accumulation. We report 530,025 unique collections of trees in Amazonia, dating between 1707 and 2015, for a total of 11,676 species in 1225 genera and 140 families. These figures support recent estimates of 16,000 total Amazonian tree species based on ecological plot data from the Amazonian Tree Diversity Network. Botanical collection in Amazonia is characterized by three major peaks, centred around 1840, 1920, and 1980, which are associated with flora projects and the establishment of inventory plots. Most collections were made in the 20th century. The number of collections has increased exponentially, but shows a slowdown in the last two decades. We find that a species’ range size is a better predictor of the number of times it has been collected than the species’ estimated basin-wide population size. Finding, describing, and documenting the distribution of the remaining species will require coordinated efforts at under-collected sites.
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            'Andean-centred' genera in the short-branch clade of Annonaceae: testing biogeographical hypotheses using phylogeny reconstruction and molecular dating

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              Monographic studies in the genus Annona L. (Annonaceae): Inclusion of the genus Rollinia A. St.-Hil

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                Author and article information

                Journal
                PhytoKeys
                PhytoKeys
                PhytoKeys
                PhytoKeys
                Pensoft Publishers
                1314-2011
                1314-2003
                2017
                21 September 2017
                : 86
                : 75-96
                Affiliations
                [1 ] Maastricht Science Programme, Maastricht University, Maastricht, The Netherlands
                [2 ] Unaffiliated, The Netherlands
                [3 ] Naturalis Biodiversity Center, Leiden, The Netherlands
                Author notes
                Corresponding author: Roy H.J. Erkens ( roy.erkens@ 123456maastrichtuniversity.nl )

                Academic editor: T. Couvreur

                Article
                10.3897/phytokeys.86.13773
                5672117
                0083caef-1407-4cd1-9e44-b333d2bc1ba0
                Roy H.J. Erkens, Jessica Oosterhof, Lubbert Y.T. Westra, Paul J.M. Maas

                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
                : 15 May 2017
                : 31 August 2017
                Categories
                Research Article

                Plant science & Botany
                biodiversity,neotropics,new species,systematics,taxonomy,plantae,magnoliales,annonaceae
                Plant science & Botany
                biodiversity, neotropics, new species, systematics, taxonomy, plantae, magnoliales, annonaceae

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