TY - JOUR T1 - Cutting up the climbers: Evidence for extensive polyphyly in Friesodielsia (Annonaceae) necessitates generic realignment across the tribe Uvarieae JF - Taxon Y1 - 2017 DO - 10.12705/661.1 A1 - Guo, Xing A1 - Hoekstra, Paul H. A1 - Tang, Chin Cheung A1 - Thomas, Daniel C. A1 - Wieringa, Jan J. A1 - Chatrou, Lars W. A1 - Saunders, Richard MK SP - 3–19 VL - 66 ER - TY - JOUR T1 - A taxonomic revision of the Neotropical genus Cremastosperma (Annonaceae), including five new species JF - PhytoKeys Y1 - 2018 DO - 10.3897/phytokeys.112.24897 A1 - Pirie, Michael D. A1 - Chatrou, Lars W. A1 - Maas, Paul J. M. SP - 1–141 AB - We present a taxonomic revision of Cremastosperma, a genus of Neotropical Annonaceae occurring in lowland to premontane wet forest, mostly in areas surrounding the Andean mountain chain. We recognise 34 species, describing five as new here: from east of the Andes, C. brachypodum Pirie & Chatrou, sp. nov. and C. dolichopodum Pirie & Maas, sp. nov., endemic to Peru; C. confusum Pirie, sp. nov., from southern Peru and adjacent Bolivia and Brazil; and C. alticola Pirie & Chatrou, sp. nov., at higher elevations in northern Peru and Ecuador; and from west of the Andes, C. osicola Pirie & Chatrou, sp. nov. endemic to Costa Rica, the most northerly distributed species of the genus. We provide an identification key, document diagnostic characters and distributions and provide illustrations and extensive lists of specimens, also presenting the latter in the form of mapping data with embedded links to images available online. Of the 34 species, 22 are regional endemics. On the basis of the extent of occurrence and area of occupancy of species estimated from the distribution data, we designate IUCN threat categries for all species. Fourteen species proved to be endangered (EN) and a further one critically endangered (CR), reflecting their rarity and narrow known distributions. VL - 112 UR - https://phytokeys.pensoft.net/article/24897/ ER - TY - JOUR T1 - Twelve new and exciting Annonaceae from the Neotropics JF - PhytoKeys Y1 - 2019 DO - 10.3897/phytokeys.126.33913 A1 - Maas, Paul J. M. A1 - Westra, Lubbert Y. Th A1 - Chatrou, Lars W. A1 - Verspagen, Nadja A1 - Rainer, Heimo A1 - Zamora, Nelson A. A1 - Erkens, Roy H. J. SP - 25–69 AB - As a result of concerted efforts of the community of Annonaceae taxonomists, increasingly detailed knowledge of the diversity of the Neotropical genera has been documented. With the exception of just two large genera, Annona and Xylopia, all Neotropical Annonaceae have been revised within the last 25 years. Subsequent to these publications, many new specimens have been collected and sent to us in Leiden for identification. These included a number that, despite the advanced state of taxonomic knowledge, proved to represent rarely collected, undescribed species. Here we describe 12 new species of Annona, Guatteria, Klarobelia, Tetrameranthus, and Xylopia. These species serve to illustrate the still underestimated diversity of the Neotropical flora, even in well studied plant groups like Annonaceae. VL - 126 UR - https://phytokeys.pensoft.net/article/33913/ ER - TY - JOUR T1 - A new species of Monanthotaxis from Gabon with a unique inflorescence type for Annonaceae JF - Phytotaxa Y1 - 2014 DO - 10.11646/phytotaxa.186.210.11646/phytotaxa.186.2.5 A1 - Hoekstra, Paul H. A1 - Chatrou, Lars W. A1 - Wieringa, Jan J. SP - 106 EP - 112 VL - 186 UR - http://biotaxa.org/Phytotaxa/issue/view/phytotaxa.186.2 IS - 2 ER - TY - JOUR T1 - A nonet of novel species of Monanthotaxis (Annonaceae) from around Africa JF - PhytoKeys Y1 - 2016 DO - 10.3897/phytokeys.69.929210.3897/phytokeys.69.9292 A1 - Hoekstra, Paul H. A1 - Wieringa, Jan J. A1 - Chatrou, Lars W. SP - 71 EP - 103 VL - 69 UR - http://phytokeys.pensoft.net/articles.php?id=9292 JO - PK ER - TY - JOUR T1 - Radiations and key innovations in an early branching angiosperm lineage (Annonaceae; Magnoliales) JF - Botanical Journal of the Linnean SocietyBotanical Journal of the Linnean Society Y1 - 2012 A1 - Erkens, Roy H. J. A1 - Chatrou, Lars W. A1 - Couvreur, Thomas L. P. SP - 117 EP - 134 KW - adaptive radiation KW - rate shift KW - sister-group comparison KW - stochastic branching pattern KW - temporal method KW - topological method AB - Biologists are fascinated by species-rich groups and have attempted to discover the causes for their abundant diversification. Comprehension of the causes and mechanisms underpinning radiations and detection of their frequency will contribute greatly to the understanding of the evolutionary origin of biodiversity and its ecological structure. A dated and well-resolved phylogenetic tree of Annonaceae was used to study diversification patterns in the family in order to identify factors that drive speciation and the evolution of morphological (key) characters. It was found that, except for Goniothalamus, the largest genera in the family are not the result of radiations. Furthermore, the difference in species numbers between subfamilies Annonoideae (former long branch clade) and Malmeoideae (former short branch clade) cannot be attributed to significant differences in the diversification rate. Most of the speciation in Annonaceae is not distinguishable from a random branching process (i.e. chance), and no special explanations are therefore necessary for the distribution of species richness across the major part of the phylogenetic tree for Annonaceae. Only for a small number of clades can key innovations be invoked to explain the elevated rate of diversification. © 2012 The Linnean Society of London, Botanical Journal of the Linnean Society, 2012, 169, 117–134. PB - Blackwell Publishing Ltd VL - 169 SN - 1095-8339 JO - Bot J Linn Soc ER - TY - JOUR T1 - A rapid diversification of rainforest trees (Guatteria; Annonaceae) following dispersal from Central into South America JF - Molecular Phylogenetics and EvolutionMolecular Phylogenetics and Evolution Y1 - 2007 A1 - Erkens, Roy H. J. A1 - Chatrou, Lars W. A1 - Maas, Jan W. A1 - van der Niet, Timotheus A1 - Savolainen, Vincent SP - 399 EP - 411 KW - Annonaceae KW - Dispersal KW - Guatteria KW - Neotropics KW - Rainforest trees KW - Rapid diversification AB - Several recent studies have suggested that a substantial portion of today's plant diversity in the Neotropics has resulted from the dispersal of taxa into that region rather than vicariance, but more data are needed to substantiate this claim. Guatteria (Annonaceae) is, with 265 species, the third largest genus of Neotropical trees after Inga (Fabaceae) and Ocotea (Lauraceae), and its widespread distribution and frequent occurrence makes the genus an excellent model taxon to study diversification patterns. This study reconstructed the phylogeny of Guatteria and inferred three major biogeographical events in the history of the genus: (1) a trans-oceanic Miocene migration from Central into South America before the closing of the Isthmus of Panama; (2) a major diversification of the lineage within South America; and (3) several migrations of South American lineages back into Central America via the closed Panamanian land bridge. Therefore, Guatteria is not an Amazonian centred-genus sensu Gentry but a major Miocene diversification that followed its dispersal into South America. This study provides further evidence that migration into the Neotropics was an important factor in the historical assembly of its biodiversity. Furthermore, it is shown that phylogenetic patterns are comparable to those found in Ocotea and Inga and that a closer comparison of these genera is desirable. VL - 44 JO - Mol Phylogenet Evol ER - TY - JOUR T1 - Early evolutionary history of the flowering plant family Annonaceae: steady diversification and boreotropical geodispersal JF - Journal of BiogeographyJournal of Biogeography Y1 - 2011 A1 - Couvreur, Thomas L. P. A1 - Pirie, Michael D. A1 - Chatrou, Lars W. A1 - Saunders, Richard M. K. A1 - Su, Yvonne C. F. A1 - Richardson, James E. A1 - Erkens, Roy H. J. SP - 664 EP - 680 KW - Biogeographic hypothesis testing KW - boreotropical hypothesis KW - diversification rates KW - Indian rafting KW - K/Pg boundary KW - LTT plots KW - molecular dating KW - museum model AB - Abstract Aim  Rain forest-restricted plant families show disjunct distributions between the three major tropical regions: South America, Africa and Asia. Explaining these disjunctions has become an important challenge in biogeography. The pantropical plant family Annonaceae is used to test hypotheses that might explain diversification and distribution patterns in tropical biota: the museum hypothesis (low extinction leading to steady accumulation of species); and dispersal between Africa and Asia via Indian rafting versus boreotropical geodispersal. Location  Tropics and boreotropics. Methods  Molecular age estimates were calculated using a Bayesian approach based on 83% generic sampling representing all major lineages within the family, seven chloroplast markers and two fossil calibrations. An analysis of diversification was carried out, which included lineage-through-time (LTT) plots and the calculation of diversification rates for genera and major clades. Ancestral areas were reconstructed using a maximum likelihood approach that implements the dispersal–extinction–cladogenesis model. Results  The LTT plots indicated a constant overall rate of diversification with low extinction rates for the family during the first 80 Ma of its existence. The highest diversification rates were inferred for several young genera such as Desmopsis, Uvariopsis and Unonopsis. A boreotropical migration route was supported over Indian rafting as the best fitting hypothesis to explain present-day distribution patterns within the family. Main conclusions  Early diversification within Annonaceae fits the hypothesis of a museum model of tropical diversification, with an overall steady increase in lineages possibly due to low extinction rates. The present-day distribution of species within the two largest clades of Annonaceae is the result of two contrasting biogeographic histories. The ‘long-branch clade’ has been diversifying since the beginning of the Cenozoic and underwent numerous geodispersals via the boreotropics and several more recent long-distance dispersal events. In contrast, the ‘short-branch clade’ dispersed once into Asia via the boreotropics during the Early Miocene and further dispersal was limited. PB - Blackwell Publishing Ltd VL - 38 SN - 1365-2699 JO - J Biogeogr ER - TY - JOUR T1 - (2029) Proposal to conserve the name Meiogyne against Fitzalania (Annonaceae) JF - TaxonTaxon Y1 - 2011 A1 - Chaowasku, Tanawat A1 - Zijlstra, Gea A1 - Chatrou, Lars W. VL - 60 N1 - 067, 105 JO - Taxon ER - TY - JOUR T1 - The natural history of Annonaceae JF - Botanical Journal of the Linnean SocietyBotanical Journal of the Linnean Society Y1 - 2012 A1 - Chatrou, Lars W. A1 - Erkens, Roy H. J. A1 - Richardson, James E. A1 - Saunders, Richard M. K. A1 - Fay, Michael F. SP - 1 EP - 4 PB - Blackwell Publishing Ltd VL - 169 SN - 1095-8339 JO - Bot J Linn Soc ER - TY - JOUR T1 - A new subfamilial and tribal classification of the pantropical flowering plant family Annonaceae informed by molecular phylogenetics JF - Botanical Journal of the Linnean SocietyBotanical Journal of the Linnean Society Y1 - 2012 A1 - Chatrou, Lars W. A1 - Pirie, Michael D. A1 - Erkens, Roy H. J. A1 - Couvreur, Thomas L. P. A1 - Neubig, Kurt M. A1 - Abbott, J. Richard A1 - Mols, Johan B. A1 - Maas, Jan W. A1 - Saunders, Richard M. K. A1 - Chase, Mark W. SP - 5 EP - 40 KW - plastid markers KW - subfamilies KW - supermatrix KW - tribes AB - The pantropical flowering plant family Annonaceae is the most species-rich family of Magnoliales. Despite long-standing interest in the systematics of Annonaceae, no authoritative classification has yet been published in the light of recent molecular phylogenetic analyses. Here, using the largest, most representative, molecular dataset compiled on Annonaceae to date, we present, for the first time, a robust family-wide phylogenetic tree and subsequent classification. We used a supermatrix of up to eight plastid markers sequenced from 193 ingroup and seven outgroup species. Some of the relationships at lower taxonomic levels are poorly resolved, but deeper nodes generally receive high support. Annonaceae comprises four major clades, which are here given the taxonomic rank of subfamily. The description of Annonoideae is amended, and three new subfamilies are described: Anaxagoreoideae, Ambavioideae and Malmeoideae. In Annonoideae, seven tribes are recognized, one of which, Duguetieae, is described as new. In Malmeoideae, seven tribes are recognized, six of which are newly described: Dendrokingstonieae, Fenerivieae, Maasieae, Malmeeae, Monocarpieae and Piptostigmateae. This new subfamilial and tribal classification is discussed against the background of previous classifications and characters to recognize subfamilies are reviewed. © 2012 The Linnean Society of London, Botanical Journal of the Linnean Society, 2012, 169, 5–40. PB - Blackwell Publishing Ltd VL - 169 SN - 1095-8339 JO - Bot J Linn Soc ER - TY - JOUR T1 - Characterization of Hubera (Annonaceae), a new genus segregated from Polyalthia and allied to Miliusa JF - Phytotaxa Y1 - 2012 A1 - Chaowasku, Tanawat A1 - Johnson, David M. A1 - Van der Ham, R. W. J. M. A1 - Chatrou, Lars W. KW - Malmeoideae KW - molecular systematics KW - Old World floristics KW - Paleotropics KW - palynology VL - 69 UR - http://www.mapress.com/phytotaxa/content/2012/f/pt00069p056.pdf ER - TY - JOUR T1 - Radiations and key innovations in an early branching angiosperm lineage (Annonaceae; Magnoliales) JF - Botanical Journal of the Linnean Society Y1 - 2012 A1 - Erkens, Roy H. J. A1 - Chatrou, Lars W. A1 - Couvreur, Thomas L.P. SP - 117 EP - 134 KW - adaptive radiation KW - rate shift KW - sister-group comparison KW - stochastic branching pattern KW - temporal method KW - topological method AB -

Biologists are fascinated by species-rich groups and have attempted to discover the causes for their abundant diversification. Comprehension of the causes and mechanisms underpinning radiations and detection of their frequency will contribute greatly to the understanding of the evolutionary origin of biodiversity and its ecological structure. A dated and well-resolved phylogenetic tree of Annonaceae was used to study diversification patterns in the family in order to identify factors that drive speciation and the evolution of morphological (key) characters. It was found that, except for Goniothalamus, the largest genera in the family are not the result of radiations. Furthermore, the difference in species numbers between subfamilies Annonoideae (former long branch clade) and Malmeoideae (former short branch clade) cannot be attributed to significant differences in the diversification rate. Most of the speciation in Annonaceae is not distinguishable from a random branching process (i.e. chance), and no special explanations are therefore necessary for the distribution of species richness across the major part of the phylogenetic tree for Annonaceae. Only for a small number of clades can key innovations be invoked to explain the elevated rate of diversification. © 2012 The Linnean Society of London, Botanical Journal of the Linnean Society, 2012, 169, 117–134.

PB - Blackwell Publishing Ltd VL - 169 SN - 1095-8339 UR - http://dx.doi.org/10.1111/j.1095-8339.2012.01223.x ER - TY - JOUR T1 - A rapid diversification of rainforest trees (Guatteria; Annonaceae) following dispersal from Central into South America JF - Molecular Phylogenetics and Evolution Y1 - 2007 A1 - Erkens, Roy H. J. A1 - Chatrou, Lars W. A1 - Maas, Jan W. A1 - van der Niet, Timotheus A1 - Savolainen, Vincent SP - 399 EP - 411 KW - Annonaceae KW - Dispersal KW - Guatteria KW - Neotropics KW - Rainforest trees KW - Rapid diversification AB -

Several recent studies have suggested that a substantial portion of today's plant diversity in the Neotropics has resulted from the dispersal of taxa into that region rather than vicariance, but more data are needed to substantiate this claim. Guatteria (Annonaceae) is, with 265 species, the third largest genus of Neotropical trees after Inga (Fabaceae) and Ocotea (Lauraceae), and its widespread distribution and frequent occurrence makes the genus an excellent model taxon to study diversification patterns. This study reconstructed the phylogeny of Guatteria and inferred three major biogeographical events in the history of the genus: (1) a trans-oceanic Miocene migration from Central into South America before the closing of the Isthmus of Panama; (2) a major diversification of the lineage within South America; and (3) several migrations of South American lineages back into Central America via the closed Panamanian land bridge. Therefore, Guatteria is not an Amazonian centred-genus sensu Gentry but a major Miocene diversification that followed its dispersal into South America. This study provides further evidence that migration into the Neotropics was an important factor in the historical assembly of its biodiversity. Furthermore, it is shown that phylogenetic patterns are comparable to those found in Ocotea and Inga and that a closer comparison of these genera is desirable.

VL - 44 UR - http://www.sciencedirect.com/science/article/B6WNH-4N4J30W-1/2/53ce435f1fe55962b5e1cbbeb334aa50 ER - TY - JOUR T1 - Molecular phylogenetics reveal multiple tertiary vicariance origins of the African rain forest trees JF - BMC Biology Y1 - 2008 DO - 10.1186/1741-7007-6-54 A1 - Couvreur, Thomas L.P. A1 - Chatrou, Lars W. A1 - Sosef, Marc S. M A1 - Richardson, James E. SP - 54 VL - 6 UR - http://www.biomedcentral.com/1741-7007/6/54 ER -