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Jérôme Munzinger - One of the best experts on this subject based on the ideXlab platform.
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Taxonomic studies of Diospyros L. (Ebenaceae) from the Malagasy region. IV. Synoptic revision of the Squamosa group in Madagascar and the Comoro Islands
Adansonia. Sér. 3, 2020Co-Authors: Jérôme Munzinger, Sven Buerki, Martin Callmander, Rodolphe Spichiger, Maria Vorontsova, Sylvie Andriambololonera, Lucienne Wilmé, Andriambolantsoa Rasolohery, Rafaël Govaerts, Sarah FicinskiAbstract:Une révision synoptique du groupe Squamosa du genre Diospyros L. (Ebenaceae) à Madagascar et aux Comores est présentée. Neuf espèces sont reconnues dont six nouvelles décrites et illustrées ici (Diospyros antakaranae Capuron ex G.E. Schatz & Lowry, sp. nov., Diospyros betamponensis G.E. Schatz & Lowry, sp. nov., Diospyros callmanderi G.E. Schatz & Lowry, sp. nov., Diospyros darainensis G.E. Schatz & Lowry, sp. nov., Diospyros phillipsonii G.E. Schatz & Lowry, sp. nov., et Diospyros sennenii G.E. Schatz & Lowry, sp. nov.). Une clé d’identification est fournie ainsi que des évaluations préliminaires du risque d’extinction selon les critères de la Liste Rouge de l’UICN. Cinq espèces sont considérées comme “En Danger” (D. betamponensis G.E. Schatz & Lowry, sp. nov., D. callmanderi G.E. Schatz & Lowry, sp. nov., D. darainensis G.E. Schatz & Lowry, sp. nov., D. phillipsonii G.E. Schatz & Lowry, sp. nov., et D. tetraceros H. Perrier), une “Vulnérable” (D. antakaranae Capuron ex G.E. Schatz & Lowry, sp. nov.), une “Quasi-menacée” (D. comorensis Hiern), et deux “Préoccupation mineure” (D. sennenii G.E. Schatz & Lowry, sp. nov. et D. squamosa Bojer ex A. DC.)
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Systematics and evolution of the Old World Ebenaceae, a review with emphasis on the large genus Diospyros and its radiation in New Caledonia
Botanical Journal of the Linnean Society, 2019Co-Authors: Rosabelle Samuel, Jérôme Munzinger, Sutee Duangjai, Barbara Turner, Ovidiu Paun, Michael Barfuss, Mark ChaseAbstract:In this review article, we provide an overview of the status of research on Old World Ebenaceae with an emphasis on the large genus Diospyros. The well-supported phylogenetic tree obtained from nucleotide sequences of multiple regions of plastid genome gave clear insights into the subfamilial classification of Ebenaceae. It supported inclusion of previously recognized genera such as Cargillia, Gunisanthus, Maba, Macreightia and Tetraclis in Diospyros. Endemic Diospyros spp. of New Caledonia have multiple origins. One of these clades has c. 21 species that are morphologically distinct and occupy different ecological niches, but they exhibit low genetic variation, leading to a lack of phylogenetic resolution. Analyses of whole plastid genome sequences did not greatly increase resolution or support for results of our previous plastid analyses. Geographical clustering of the individuals against a background of lower sequence divergence of the whole plastid genome could be due to transfer of plastid genomes during hybridization and introgression following secondary contact. However, > 8400 filtered single nucleotide polymorphisms (SNPs) from restriction site associated DNA sequencing (RADseq) confirmed species circumscriptions for this clade and produced well-supported phylogenetic relationships, pointing to an early regional clustering among populations and species. This supported allopatric speciation with respect to macrohabitat (i.e. climatic conditions) having had a role in the initial differentiation in the group. A later, more rapid radiation involved divergence with respect to microhabitat (e.g. soil preference). Although chromosome counts indicate that Diospyros spp. are consistently diploids with 2n = 30, extensive variation in genome size has been observed, which is due to an increase of repeat elements, including LTR/gypsy. In Ebenaceae, pollen is heterogeneous, and palynological synapomorphies are traced at different taxonomic levels. Several new Diospyros spp. have recently been identified and documented from India, Thailand, China, Africa and New Caledonia. Taxonomic revisions have been completed for the Australian species, and synonyms are reported for some New Caledonian Diospyros spp.
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molecular phylogenetics of new caledonian Diospyros ebenaceae using plastid and nuclear markers
Molecular Phylogenetics and Evolution, 2013Co-Authors: Barbara Turner, Jérôme Munzinger, Sutee Duangjai, Michael H J Barfuss, Mark W Chase, Eva M Temsch, Reinhold Stockenhuber, Rosabelle SamuelAbstract:To clarify phylogenetic relationships among New Caledonian species of Diospyros, sequences of four plastid markers (atpB, rbcL, trnK–matK and trnS–trnG) and two low-copy nuclear markers (ncpGS and PHYA) were analysed. New Caledonian Diospyros species fall into three clades, two of which have only a few members (1 or 5 species); the third has 21 closely related species for which relationships among species have been mostly unresolved in a previous study. Although species of the third group (NC clade III) are morphologically distinct and largely occupy different habitats, they exhibit little molecular variability. Diospyros vieillardii is sister to the rest of the NC clade III, followed by D. umbrosa and D. flavocarpa, which are sister to the rest of this clade. Species from coastal habitats of western Grande Terre (D. cherrieri and D. veillonii) and some found on coralline substrates (D. calciphila and D. inexplorata) form two well-supported subgroups. The species of NC clade III have significantly larger genomes than found in diploid species of Diospyros from other parts of the world, but they all appear to be diploids. By applying a molecular clock, we infer that the ancestor of the NC clade III arrived in New Caledonia around 9 million years ago. The oldest species are around 7 million years old and the youngest ones probably much less than 1 million years.
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A multi-locus plastid phylogenetic analysis of the pantropical genus Diospyros (Ebenaceae), with an emphasis on the radiation and biogeographic origins of the New Caledonian endemic species.
Molecular Phylogenetics and Evolution, 2009Co-Authors: Sutee Duangjai, Jérôme Munzinger, Rosabelle Samuel, Félix Forest, Bruno Wallnöfer, Michael H J Barfuss, Gunter Fischer, Mark W ChaseAbstract:We aimed to clarify phylogenetic relationships within the pantropical genus Diospyros (Ebenaceae sensulato), and ascertain biogeographical patterns in the New Caledonian endemic species. We used DNA sequences from eight plastid regions (rbcL, atpB, matK, ndhF, trnK intron, trnL intron, trnL-trnF spacer, and trnS-trnG spacer) and included 149 accessions representing 119 Diospyros species in our analysis. Results from this study confirmed the monophyly of Diospyros with good support and provided a clearer picture of the relationships within the genus than in previous studies. Evidence from phylogenetic analyses suggests that Diospyros colonized New Caledonia multiple times. The four lineages of Diospyros in New Caledonia also differ in their degree of diversification. The molecular data indicate that one lineage is paleoendemic and derived from an ancient Australian species. The other three lineages are more closely related to several Southeast Asian species; two of them are neoendemics, and one has radiated rapidly and recently.
Sutee Duangjai - One of the best experts on this subject based on the ideXlab platform.
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Diospyros phuwuaensis (Ebenaceae), a new species from North-Eastern Thailand
Thai Forest Bulletin (Botany), 2020Co-Authors: Sutee Duangjai, Sukid Rueangruea, Thamarat Phutthai, David J. Middleton, Somran Suddee, Chatuchak Plant ConservationAbstract:Diospyros phuwuaensis, a new species from Phu Wua Wildlife Sanctuary, North-Eastern Thailand is described and illustrated. Photographs, ecological information and an IUCN conservation status are provided. The distinctive morphological characters of the new species and its related species are discussed. Based on cpDNA data, the new species is confirmed as an independent lineage and placed in the Diospyros clade V sensu Duangjai et al. (2009). It has phylogenetic affinities with Diospyros mollis, and then D. fulvopilosa and D. kurzii. Our result supports the assignment of the new species to Diospyros section Kurzella. A revised description and a key to the species of Diospyros section Kurzella is presented.
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Systematics and evolution of the Old World Ebenaceae, a review with emphasis on the large genus Diospyros and its radiation in New Caledonia
Botanical Journal of the Linnean Society, 2019Co-Authors: Rosabelle Samuel, Jérôme Munzinger, Sutee Duangjai, Barbara Turner, Ovidiu Paun, Michael Barfuss, Mark ChaseAbstract:In this review article, we provide an overview of the status of research on Old World Ebenaceae with an emphasis on the large genus Diospyros. The well-supported phylogenetic tree obtained from nucleotide sequences of multiple regions of plastid genome gave clear insights into the subfamilial classification of Ebenaceae. It supported inclusion of previously recognized genera such as Cargillia, Gunisanthus, Maba, Macreightia and Tetraclis in Diospyros. Endemic Diospyros spp. of New Caledonia have multiple origins. One of these clades has c. 21 species that are morphologically distinct and occupy different ecological niches, but they exhibit low genetic variation, leading to a lack of phylogenetic resolution. Analyses of whole plastid genome sequences did not greatly increase resolution or support for results of our previous plastid analyses. Geographical clustering of the individuals against a background of lower sequence divergence of the whole plastid genome could be due to transfer of plastid genomes during hybridization and introgression following secondary contact. However, > 8400 filtered single nucleotide polymorphisms (SNPs) from restriction site associated DNA sequencing (RADseq) confirmed species circumscriptions for this clade and produced well-supported phylogenetic relationships, pointing to an early regional clustering among populations and species. This supported allopatric speciation with respect to macrohabitat (i.e. climatic conditions) having had a role in the initial differentiation in the group. A later, more rapid radiation involved divergence with respect to microhabitat (e.g. soil preference). Although chromosome counts indicate that Diospyros spp. are consistently diploids with 2n = 30, extensive variation in genome size has been observed, which is due to an increase of repeat elements, including LTR/gypsy. In Ebenaceae, pollen is heterogeneous, and palynological synapomorphies are traced at different taxonomic levels. Several new Diospyros spp. have recently been identified and documented from India, Thailand, China, Africa and New Caledonia. Taxonomic revisions have been completed for the Australian species, and synonyms are reported for some New Caledonian Diospyros spp.
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molecular phylogenetics of new caledonian Diospyros ebenaceae using plastid and nuclear markers
Molecular Phylogenetics and Evolution, 2013Co-Authors: Barbara Turner, Jérôme Munzinger, Sutee Duangjai, Michael H J Barfuss, Mark W Chase, Eva M Temsch, Reinhold Stockenhuber, Rosabelle SamuelAbstract:To clarify phylogenetic relationships among New Caledonian species of Diospyros, sequences of four plastid markers (atpB, rbcL, trnK–matK and trnS–trnG) and two low-copy nuclear markers (ncpGS and PHYA) were analysed. New Caledonian Diospyros species fall into three clades, two of which have only a few members (1 or 5 species); the third has 21 closely related species for which relationships among species have been mostly unresolved in a previous study. Although species of the third group (NC clade III) are morphologically distinct and largely occupy different habitats, they exhibit little molecular variability. Diospyros vieillardii is sister to the rest of the NC clade III, followed by D. umbrosa and D. flavocarpa, which are sister to the rest of this clade. Species from coastal habitats of western Grande Terre (D. cherrieri and D. veillonii) and some found on coralline substrates (D. calciphila and D. inexplorata) form two well-supported subgroups. The species of NC clade III have significantly larger genomes than found in diploid species of Diospyros from other parts of the world, but they all appear to be diploids. By applying a molecular clock, we infer that the ancestor of the NC clade III arrived in New Caledonia around 9 million years ago. The oldest species are around 7 million years old and the youngest ones probably much less than 1 million years.
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A multi-locus plastid phylogenetic analysis of the pantropical genus Diospyros (Ebenaceae), with an emphasis on the radiation and biogeographic origins of the New Caledonian endemic species.
Molecular Phylogenetics and Evolution, 2009Co-Authors: Sutee Duangjai, Jérôme Munzinger, Rosabelle Samuel, Félix Forest, Bruno Wallnöfer, Michael H J Barfuss, Gunter Fischer, Mark W ChaseAbstract:We aimed to clarify phylogenetic relationships within the pantropical genus Diospyros (Ebenaceae sensulato), and ascertain biogeographical patterns in the New Caledonian endemic species. We used DNA sequences from eight plastid regions (rbcL, atpB, matK, ndhF, trnK intron, trnL intron, trnL-trnF spacer, and trnS-trnG spacer) and included 149 accessions representing 119 Diospyros species in our analysis. Results from this study confirmed the monophyly of Diospyros with good support and provided a clearer picture of the relationships within the genus than in previous studies. Evidence from phylogenetic analyses suggests that Diospyros colonized New Caledonia multiple times. The four lineages of Diospyros in New Caledonia also differ in their degree of diversification. The molecular data indicate that one lineage is paleoendemic and derived from an ancient Australian species. The other three lineages are more closely related to several Southeast Asian species; two of them are neoendemics, and one has radiated rapidly and recently.
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A new description of Diospyros coaetanea (Ebenaceae)
2003Co-Authors: Sutee Duangjai, Chamlong PhengklaiAbstract:Following the discovery of female and fruiting specimens of Diospyros coaetanea , the description and keys to this species are emended.
Rosabelle Samuel - One of the best experts on this subject based on the ideXlab platform.
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Systematics and evolution of the Old World Ebenaceae, a review with emphasis on the large genus Diospyros and its radiation in New Caledonia
Botanical Journal of the Linnean Society, 2019Co-Authors: Rosabelle Samuel, Jérôme Munzinger, Sutee Duangjai, Barbara Turner, Ovidiu Paun, Michael Barfuss, Mark ChaseAbstract:In this review article, we provide an overview of the status of research on Old World Ebenaceae with an emphasis on the large genus Diospyros. The well-supported phylogenetic tree obtained from nucleotide sequences of multiple regions of plastid genome gave clear insights into the subfamilial classification of Ebenaceae. It supported inclusion of previously recognized genera such as Cargillia, Gunisanthus, Maba, Macreightia and Tetraclis in Diospyros. Endemic Diospyros spp. of New Caledonia have multiple origins. One of these clades has c. 21 species that are morphologically distinct and occupy different ecological niches, but they exhibit low genetic variation, leading to a lack of phylogenetic resolution. Analyses of whole plastid genome sequences did not greatly increase resolution or support for results of our previous plastid analyses. Geographical clustering of the individuals against a background of lower sequence divergence of the whole plastid genome could be due to transfer of plastid genomes during hybridization and introgression following secondary contact. However, > 8400 filtered single nucleotide polymorphisms (SNPs) from restriction site associated DNA sequencing (RADseq) confirmed species circumscriptions for this clade and produced well-supported phylogenetic relationships, pointing to an early regional clustering among populations and species. This supported allopatric speciation with respect to macrohabitat (i.e. climatic conditions) having had a role in the initial differentiation in the group. A later, more rapid radiation involved divergence with respect to microhabitat (e.g. soil preference). Although chromosome counts indicate that Diospyros spp. are consistently diploids with 2n = 30, extensive variation in genome size has been observed, which is due to an increase of repeat elements, including LTR/gypsy. In Ebenaceae, pollen is heterogeneous, and palynological synapomorphies are traced at different taxonomic levels. Several new Diospyros spp. have recently been identified and documented from India, Thailand, China, Africa and New Caledonia. Taxonomic revisions have been completed for the Australian species, and synonyms are reported for some New Caledonian Diospyros spp.
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molecular phylogenetics of new caledonian Diospyros ebenaceae using plastid and nuclear markers
Molecular Phylogenetics and Evolution, 2013Co-Authors: Barbara Turner, Jérôme Munzinger, Sutee Duangjai, Michael H J Barfuss, Mark W Chase, Eva M Temsch, Reinhold Stockenhuber, Rosabelle SamuelAbstract:To clarify phylogenetic relationships among New Caledonian species of Diospyros, sequences of four plastid markers (atpB, rbcL, trnK–matK and trnS–trnG) and two low-copy nuclear markers (ncpGS and PHYA) were analysed. New Caledonian Diospyros species fall into three clades, two of which have only a few members (1 or 5 species); the third has 21 closely related species for which relationships among species have been mostly unresolved in a previous study. Although species of the third group (NC clade III) are morphologically distinct and largely occupy different habitats, they exhibit little molecular variability. Diospyros vieillardii is sister to the rest of the NC clade III, followed by D. umbrosa and D. flavocarpa, which are sister to the rest of this clade. Species from coastal habitats of western Grande Terre (D. cherrieri and D. veillonii) and some found on coralline substrates (D. calciphila and D. inexplorata) form two well-supported subgroups. The species of NC clade III have significantly larger genomes than found in diploid species of Diospyros from other parts of the world, but they all appear to be diploids. By applying a molecular clock, we infer that the ancestor of the NC clade III arrived in New Caledonia around 9 million years ago. The oldest species are around 7 million years old and the youngest ones probably much less than 1 million years.
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A multi-locus plastid phylogenetic analysis of the pantropical genus Diospyros (Ebenaceae), with an emphasis on the radiation and biogeographic origins of the New Caledonian endemic species.
Molecular Phylogenetics and Evolution, 2009Co-Authors: Sutee Duangjai, Jérôme Munzinger, Rosabelle Samuel, Félix Forest, Bruno Wallnöfer, Michael H J Barfuss, Gunter Fischer, Mark W ChaseAbstract:We aimed to clarify phylogenetic relationships within the pantropical genus Diospyros (Ebenaceae sensulato), and ascertain biogeographical patterns in the New Caledonian endemic species. We used DNA sequences from eight plastid regions (rbcL, atpB, matK, ndhF, trnK intron, trnL intron, trnL-trnF spacer, and trnS-trnG spacer) and included 149 accessions representing 119 Diospyros species in our analysis. Results from this study confirmed the monophyly of Diospyros with good support and provided a clearer picture of the relationships within the genus than in previous studies. Evidence from phylogenetic analyses suggests that Diospyros colonized New Caledonia multiple times. The four lineages of Diospyros in New Caledonia also differ in their degree of diversification. The molecular data indicate that one lineage is paleoendemic and derived from an ancient Australian species. The other three lineages are more closely related to several Southeast Asian species; two of them are neoendemics, and one has radiated rapidly and recently.
Porter P. Lowry - One of the best experts on this subject based on the ideXlab platform.
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taxonomic studies of Diospyros l ebenaceae from the malagasy region iv synoptic revision of the squamosa group in madagascar and the comoro islands
Adansonia, 2020Co-Authors: George Schatz, Porter P. LowryAbstract:A synoptic revision of the Squamosa group of Diospyros L. (Ebenaceae) in Madagascar and the Comoro Islands is presented in which nine species are recognized, including six new species that are described and illustrated (Diospyros antakaranae Capuron ex G.E. Schatz & Lowry, sp. nov., Diospyros betamponensis G.E. Schatz & Lowry, sp. nov., Diospyros callmanderi G.E. Schatz & Lowry, sp. nov., Diospyros darainensis G.E. Schatz & Lowry, sp. nov., Diospyros phillipsonii G.E. Schatz & Lowry, sp. nov., and Diospyros sennenii G.E. Schatz & Lowry, sp. nov.). A key to the species is provided, along with an IUCN risk of extinction assessment for each species. Five species are assessed as Endangered (D. betamponensis G.E. Schatz & Lowry, sp. nov., D. callmanderi G.E. Schatz & Lowry, sp. nov., D. darainensis G.E. Schatz & Lowry, sp. nov., D. phillipsonii G.E. Schatz & Lowry, sp. nov., and D. tetraceros H. Perrier), one as Vulnerable (D. antakaranae Capuron ex G.E. Schatz & Lowry, sp. nov.), one as Near Threatened (D. comorensis Hiern), and two as Least Concern (D. sennenii G.E. Schatz & Lowry, sp. nov. and D. squamosa Bojer ex A. DC.).
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Ebony and the Mascarenes: the evolutionary relationships and biogeography of Diospyros (Ebenaceae) in the western Indian Ocean
Botanical Journal of the Linnean Society, 2019Co-Authors: Alexander G. Linan, George Schatz, Porter P. Lowry, Allison J. Miller, Christine E. EdwardsAbstract:Abstract Using analyses that exhaustively sampled Mascarene Diospyros and included representative taxa from Madagascar and other regions, we explored: (1) evolutionary relationships among Diospyros spp. across the WIO and (2) biogeographic connections of Malagasy taxa with those in surrounding regions, particularly focusing on connections with taxa in the Mascarene Islands. We obtained plastid sequence data for 146 Diospyros taxa, including 40 species not previously included in molecular analyses, and conducted Bayesian and maximum-likelihood phylogenetic analyses, divergence-time estimation and ancestral area reconstructions. Diospyros sampled from Madagascar fell into two clades, one of which contains all but two Malagasy species. Biogeographic analyses revealed that many clades probably originated in Madagascar and dispersed to locations in Africa and the Mascarenes, indicating that Madagascar may have acted as an important source of diversity for the region.
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Novitates neocaledonicae. IX. Taxonomic notes on New Caledonian Diospyros (Ebenaceae) with new synonymy and the description of two new species
Candollea, 2018Co-Authors: George Schatz, Porter P. LowryAbstract:Abstract Schatz, G.E. & P.P. Lowry II (2018). Novitates neocaledonicae. IX. Taxonomic notes on New Caledonian Diospyros (Ebenaceae) with new synonymy and the description of two new species. Candollea 73: 91–100. In English, English and French abstracts. DOI: http://dx.doi.org/10.15553/c2018v731a8 A review of the taxonomy of Diospyros L. (Ebenaceae) in New Caledonia results in the description of two new species and the placement in synonymy of six species previously recognized in the treatment of Ebenaceae for the Flore de la Nouvelle-Caledonie et Dependances. Diospyros hequetiae G.E. Schatz, Lowry & Fleurot and Diospyros rufotomentosa G.E. Schatz & Lowry are described and illustrated with line drawings and field photographs, accompanied by a distribution map. Risk of extinction assessments indicate that Diospyros hequetiae is “Endangered” and Diospyros rufotomentosa is “Near Threatened”. A lectotype is designated for Diospyros samoensis A. Gray. Submitted December 8, 2017. Accepted on April 16, 2018. Firs...
George Schatz - One of the best experts on this subject based on the ideXlab platform.
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taxonomic studies of Diospyros l ebenaceae from the malagasy region iv synoptic revision of the squamosa group in madagascar and the comoro islands
Adansonia, 2020Co-Authors: George Schatz, Porter P. LowryAbstract:A synoptic revision of the Squamosa group of Diospyros L. (Ebenaceae) in Madagascar and the Comoro Islands is presented in which nine species are recognized, including six new species that are described and illustrated (Diospyros antakaranae Capuron ex G.E. Schatz & Lowry, sp. nov., Diospyros betamponensis G.E. Schatz & Lowry, sp. nov., Diospyros callmanderi G.E. Schatz & Lowry, sp. nov., Diospyros darainensis G.E. Schatz & Lowry, sp. nov., Diospyros phillipsonii G.E. Schatz & Lowry, sp. nov., and Diospyros sennenii G.E. Schatz & Lowry, sp. nov.). A key to the species is provided, along with an IUCN risk of extinction assessment for each species. Five species are assessed as Endangered (D. betamponensis G.E. Schatz & Lowry, sp. nov., D. callmanderi G.E. Schatz & Lowry, sp. nov., D. darainensis G.E. Schatz & Lowry, sp. nov., D. phillipsonii G.E. Schatz & Lowry, sp. nov., and D. tetraceros H. Perrier), one as Vulnerable (D. antakaranae Capuron ex G.E. Schatz & Lowry, sp. nov.), one as Near Threatened (D. comorensis Hiern), and two as Least Concern (D. sennenii G.E. Schatz & Lowry, sp. nov. and D. squamosa Bojer ex A. DC.).
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Ebony and the Mascarenes: the evolutionary relationships and biogeography of Diospyros (Ebenaceae) in the western Indian Ocean
Botanical Journal of the Linnean Society, 2019Co-Authors: Alexander G. Linan, George Schatz, Porter P. Lowry, Allison J. Miller, Christine E. EdwardsAbstract:Abstract Using analyses that exhaustively sampled Mascarene Diospyros and included representative taxa from Madagascar and other regions, we explored: (1) evolutionary relationships among Diospyros spp. across the WIO and (2) biogeographic connections of Malagasy taxa with those in surrounding regions, particularly focusing on connections with taxa in the Mascarene Islands. We obtained plastid sequence data for 146 Diospyros taxa, including 40 species not previously included in molecular analyses, and conducted Bayesian and maximum-likelihood phylogenetic analyses, divergence-time estimation and ancestral area reconstructions. Diospyros sampled from Madagascar fell into two clades, one of which contains all but two Malagasy species. Biogeographic analyses revealed that many clades probably originated in Madagascar and dispersed to locations in Africa and the Mascarenes, indicating that Madagascar may have acted as an important source of diversity for the region.
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Novitates neocaledonicae. IX. Taxonomic notes on New Caledonian Diospyros (Ebenaceae) with new synonymy and the description of two new species
Candollea, 2018Co-Authors: George Schatz, Porter P. LowryAbstract:Abstract Schatz, G.E. & P.P. Lowry II (2018). Novitates neocaledonicae. IX. Taxonomic notes on New Caledonian Diospyros (Ebenaceae) with new synonymy and the description of two new species. Candollea 73: 91–100. In English, English and French abstracts. DOI: http://dx.doi.org/10.15553/c2018v731a8 A review of the taxonomy of Diospyros L. (Ebenaceae) in New Caledonia results in the description of two new species and the placement in synonymy of six species previously recognized in the treatment of Ebenaceae for the Flore de la Nouvelle-Caledonie et Dependances. Diospyros hequetiae G.E. Schatz, Lowry & Fleurot and Diospyros rufotomentosa G.E. Schatz & Lowry are described and illustrated with line drawings and field photographs, accompanied by a distribution map. Risk of extinction assessments indicate that Diospyros hequetiae is “Endangered” and Diospyros rufotomentosa is “Near Threatened”. A lectotype is designated for Diospyros samoensis A. Gray. Submitted December 8, 2017. Accepted on April 16, 2018. Firs...
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Two new species of Diospyros (Ebenaceae) from Central Africa
Plant Ecology and Evolution, 2017Co-Authors: Olivier Lachenaud, George Schatz, Gilles Dauby, Tariq StévartAbstract:Background and aims – Diospyros (Ebenaceae), a large genus with a mostly tropical distribution, includes 736 species worldwide, 104 of which occur in continental Africa. During recent field work in west-central Gabon, two new species of Diospyros were collected. They are described and illustrated here, and compared with their most similar relatives. Preliminary conservation status assessments are also provided. Methods – Normal practices of herbarium taxonomy were applied to study all available herbarium material, mainly from BR, BRLU, LBV, MO, P and WAG. The conservation status of both species was evaluated following the IUCN Red List Categories and Criteria. Key results – Diospyros cleistantha O.Lachenaud & G.E.Schatz occurs in the Atlantic regions of Cameroon, Equatorial Guinea and Gabon; it belongs to D. sect. Calvitiella and closely resembles D. zenkeri and D. iturensis. Diospyros subargentea O.Lachenaud, Dauby & G.E.Schatz is endemic to west-central Gabon; it belongs to D. sect. Noltia and most closely resembles D. soyauxii. The conservation status of the two species is assessed as Endangered and Vulnerable, respectively.SCOPUS: ar.jinfo:eu-repo/semantics/publishe