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Jurgen Kellermann - One of the best experts on this subject based on the ideXlab platform.
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Re-instatement of the name Spyridium waterhousei from Kangaroo Island, South Australia, with a short history of the tribe Pomaderreae (Rhamnaceae)
2007Co-Authors: Jurgen KellermannAbstract:The name Spyridium waterhousei F.Muell. is re-instated for a species of Rhamnaceae (Pomaderreae), endemic to Kangaroo Island, South Australia, that is currently known as Cryptandra waterhousei (F.Muell.) F.Muell. The taxonomic history of the species and of the tribe Pomaderreae is explored and the changing generic concepts are reviewed in the light of recent publications. A lectotype is nominated for the species. It was named after Frederick G. Waterhouse, who was one of the first botanical collectors on the island.
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Cryptandra triplex K.R.Thiele ex Kellermann, a new species of Rhamnaceae (Pomaderreae) from Arnhem Land, Northern Territory
2006Co-Authors: Jurgen KellermannAbstract:Kellermann, J. (2006). Cryptandra triplex K.R.Thiele ex Kellermann, a new species of Rhamnaceae (Pomaderreae) from Arnhem Land, Northern Territory. Austrobaileya 7(2): 299–303. A new species of Cryptandra Sm. is described from the Kakadu and Nitmiluk National Parks in Arnhem Land, Northern Territory, C. triplex K.R.Thiele ex Kellermann. It is closely related to C. intratropica W.Fitzg. and C. filiformis A.R.Bean. A distribution map, a photograph of the holotype and a key to Cryptandra species from northern Australia are provided.
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phylogenetic analysis and generic limits of the tribe pomaderreae Rhamnaceae using internal transcribed spacer dna sequences
Taxon, 2005Co-Authors: Jurgen Kellermann, Frank Udovicic, Pauline Y LadigesAbstract:The tribe Pomaderreae (Rhamnaceae) currently consists of approximately 180 species in seven genera, endemic to Australia and New Zealand. It is the second largest tribe of Rhamnaceae. We undertook a phylogenetic analysis using internal transcribed spacer (ITS) sequence data from 69 representative species of Pomaderreae and five outgroup taxa. The monophyly of Pomaderreae was confirmed. The clades found in the strict consensus tree are mostly consistent with the currently accepted genera of the tribe. All major clades, except Stenanthemum, received moderate to strong bootstrap and jackknife support. Only the relationship between Siegfriedia and Pomaderris received strong support; relationships between other genera did not receive support above 50%. Taxonomic changes are suggested and a preliminary classification of Pomaderreae is proposed, including the monophyletic genera Cryptandra, Pomaderris, Spyridium and Trymalium. Blackallia and Siegfriedia are monotypic. Two new genera are required: one containing two atypical species of Stenanthemum and the second genus consisting of previously unrelated species from three genera that share a 2-carpellate ovary and a characteristic indumentum. The taxonomic status of Stenanthemum requires further examination. A split of Cryplandra into smaller genera is not supported.
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New combinations for two species of Spyridium (Rhamnaceae: Pomaderreae) from the Grampians, Victoria
2005Co-Authors: Jurgen KellermannAbstract:Recent molecular and morphological studies on Australian Rhamnaceae have revealed that two species of Trymalium Fenzl endemic to the Victorian Grampians are misplaced in the genus and should be transferred to Spyridium Fenzl. Two new combinations, Spyridium daltonii (F. Muell) J. Kellerm. and S. xramosissimum (Audas) J. Kellerm., are provided. Lectotypes are chosen for both species.
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Historical biogeography of Australian Rhamnaceae, tribe Pomaderreae
Journal of Biogeography, 2005Co-Authors: Pauline Y Ladiges, Jurgen Kellermann, Gareth Nelson, Christopher J. Humphries, Frank UdovicicAbstract:Aim To discover the pattern of relationships of areas of endemism for Australian genera in the plant family Rhamnaceae tribe Pomaderreae for comparison with other taxa and interpretation of biogeographical history. Location Australian mainland, Tasmania and New Zealand. Methods A molecular phylogeny and geographic distribution of species within four clades of Pomaderreae are used as a basis for recognition of areas of endemism and analysis of area relationships using paralogy-free subtrees. The taxon phylogeny is the strict consensus tree from a parsimony analysis of 54 taxa, in four clades, and sequence data for the internal transcribed spacer regions of ribosomal DNA (ITS1-5.8S-ITS2) and the plastid DNA region trnL-F. Results The biogeographical analysis identified five subtrees, which, after parsimony analysis, resulted in a minimal tree with 100% consistency and seven resolved nodes. Three sets of area relationships were identified: the areas of Arnhem and Kimberley in tropical north Australia are related based on the phylogeny of taxa within Cryptandra; the moister South-west of Western Australia, its sister area the coastal Geraldton Sandplains, the semi-arid Interzone region and arid Western Desert are related, based on taxa within Cryptandra, Spyridium, Trymalium and Pomaderris; and the eastern regions of Queensland, McPherson-Macleay, south-eastern New South Wales (NSW), Victoria, southern Australia, Tasmania and New Zealand are related based on Cryptandra, Pomaderris and Spyridium. Tasmania and NSW are related based entirely on Cryptandra, but the position of New Zealand relative to the other south-eastern Australian regions is unresolved. Main conclusions The method of paralogy-free subtrees identified a general pattern of geographic area relationships based on Australian Pomaderreae. The widespread distribution of clades, the high level of endemicity and the age of fossils for the family, suggest that the Pomaderreae are an old group among the Australian flora. Their biogeographical history may date to the early Palaeogene with subsequent changes through to the Pleistocene.
Pauline Y Ladiges - One of the best experts on this subject based on the ideXlab platform.
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phylogenetic analysis and generic limits of the tribe pomaderreae Rhamnaceae using internal transcribed spacer dna sequences
Taxon, 2005Co-Authors: Jurgen Kellermann, Frank Udovicic, Pauline Y LadigesAbstract:The tribe Pomaderreae (Rhamnaceae) currently consists of approximately 180 species in seven genera, endemic to Australia and New Zealand. It is the second largest tribe of Rhamnaceae. We undertook a phylogenetic analysis using internal transcribed spacer (ITS) sequence data from 69 representative species of Pomaderreae and five outgroup taxa. The monophyly of Pomaderreae was confirmed. The clades found in the strict consensus tree are mostly consistent with the currently accepted genera of the tribe. All major clades, except Stenanthemum, received moderate to strong bootstrap and jackknife support. Only the relationship between Siegfriedia and Pomaderris received strong support; relationships between other genera did not receive support above 50%. Taxonomic changes are suggested and a preliminary classification of Pomaderreae is proposed, including the monophyletic genera Cryptandra, Pomaderris, Spyridium and Trymalium. Blackallia and Siegfriedia are monotypic. Two new genera are required: one containing two atypical species of Stenanthemum and the second genus consisting of previously unrelated species from three genera that share a 2-carpellate ovary and a characteristic indumentum. The taxonomic status of Stenanthemum requires further examination. A split of Cryplandra into smaller genera is not supported.
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Historical biogeography of Australian Rhamnaceae, tribe Pomaderreae
Journal of Biogeography, 2005Co-Authors: Pauline Y Ladiges, Jurgen Kellermann, Gareth Nelson, Christopher J. Humphries, Frank UdovicicAbstract:Aim To discover the pattern of relationships of areas of endemism for Australian genera in the plant family Rhamnaceae tribe Pomaderreae for comparison with other taxa and interpretation of biogeographical history. Location Australian mainland, Tasmania and New Zealand. Methods A molecular phylogeny and geographic distribution of species within four clades of Pomaderreae are used as a basis for recognition of areas of endemism and analysis of area relationships using paralogy-free subtrees. The taxon phylogeny is the strict consensus tree from a parsimony analysis of 54 taxa, in four clades, and sequence data for the internal transcribed spacer regions of ribosomal DNA (ITS1-5.8S-ITS2) and the plastid DNA region trnL-F. Results The biogeographical analysis identified five subtrees, which, after parsimony analysis, resulted in a minimal tree with 100% consistency and seven resolved nodes. Three sets of area relationships were identified: the areas of Arnhem and Kimberley in tropical north Australia are related based on the phylogeny of taxa within Cryptandra; the moister South-west of Western Australia, its sister area the coastal Geraldton Sandplains, the semi-arid Interzone region and arid Western Desert are related, based on taxa within Cryptandra, Spyridium, Trymalium and Pomaderris; and the eastern regions of Queensland, McPherson-Macleay, south-eastern New South Wales (NSW), Victoria, southern Australia, Tasmania and New Zealand are related based on Cryptandra, Pomaderris and Spyridium. Tasmania and NSW are related based entirely on Cryptandra, but the position of New Zealand relative to the other south-eastern Australian regions is unresolved. Main conclusions The method of paralogy-free subtrees identified a general pattern of geographic area relationships based on Australian Pomaderreae. The widespread distribution of clades, the high level of endemicity and the age of fossils for the family, suggest that the Pomaderreae are an old group among the Australian flora. Their biogeographical history may date to the early Palaeogene with subsequent changes through to the Pleistocene.
James E. Richardson - One of the best experts on this subject based on the ideXlab platform.
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Do Mediterranean-type ecosystems have a common history?--insights from the Buckthorn family (Rhamnaceae).
Evolution; international journal of organic evolution, 2015Co-Authors: Renske E. Onstein, James E. Richardson, Richard J. Carter, Yao-wu Xing, H. Peter LinderAbstract:Mediterranean-type ecosystems (MTEs) are remarkable in their species richness and endemism, but the processes that have led to this diversity remain enigmatic. Here, we hypothesize that continent-dependent speciation and extinction rates have led to disparity in diversity between the five MTEs of the world: the Cape, California, Mediterranean Basin, Chile, and Western Australia. To test this hypothesis, we built a phylogenetic tree for 280 Rhamnaceae species, estimated divergence times using eight fossil calibrations, and used Bayesian methods and simulations to test for differences in diversification rates. Rhamnaceae lineages in MTEs generally show higher diversification rates than elsewhere, but speciation and extinction dynamics show a pattern of continent-dependence. We detected high speciation and extinction rates in California and significantly lower extinction rates in the Cape and Western Australia. The independent colonization of four of five MTEs may have occurred conterminously in the Oligocene/Early Miocene, but colonization of the Mediterranean Basin happened later, in the Late Miocene. This suggests that the in situ radiations of these clades were initiated before the onset of winter rainfall in these regions. These results indicate independent evolutionary histories of Rhamnaceae in MTEs, possibly related to the intensity of climate oscillations and the geological history of the regions.
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Historical biogeography of two cosmopolitan families of flowering plants: Annonaceae and Rhamnaceae.
Philosophical transactions of the Royal Society of London. Series B Biological sciences, 2004Co-Authors: James E. Richardson, Lars W. Chatrou, Johan B. Mols, Roy H. J. Erkens, Michael D. PirieAbstract:Annonaceae are a pantropically distributed family found predominantly in rainforests, so they are megathermal taxa, whereas Rhamnaceae are a cosmopolitan family that tend to be found in xeric regions and may be classified as mesothermal. Phylogenetic analyses of these families are presented based on rbcL and trnL-F plastid DNA sequences. Likelihood ratio tests revealed rate heterogeneity in both phylogenetic trees and they were therefore made ultrametric using non-parametric rate smoothing and penalized likelihood. Divergence times were then estimated using fossil calibration points. The historical biogeography of these families that are species rich in different biomes is discussed and compared with other published reconstructions. Rhamnaceae and most lineages within Annonaceae are too young to have had their distribution patterns influenced by break-up of previously connected Gondwanan landmasses. Contrasts in the degree of geographical structure between these two families may be explained by differences in age and dispersal capability. In both groups, long-distance dispersal appears to have played a more significant role in establishing modern patterns than had previously been assumed. Both families also contain examples of recent diversification of species-rich lineages. An understanding of the processes responsible for shaping the distribution patterns of these families has contributed to our understanding of the historical assembly of the biomes that they occupy.
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Phylogenetic analysis of Phylica L. (Rhamnaceae) with an emphasis on island species: evidence from plastid trnL-F and nuclear internal transcribed spacer
2001Co-Authors: James E. Richardson, Michael F. Fay, Quentin C. B. Cronk, H. Peter Linder, F.m. Weitz, Gail Reeves, Mark W. ChaseAbstract:Summary Richardson, J. E., Weitz, F. M., Fay, M. F., Cronk, Q. C. B., Linder, H. P., Reeves, G. & Chase, M. W.: Phylogenetic analysis of Phylica L. (Rhamnaceae) with an emphasis on island species: evidence from plastid trnL-F DNA and nuclear internal transcribed spacer (ribosomal DNA) sequences. - Taxon 50: 405-427. 2001. - ISSN 0040-0262. The relationships of the island species of Phylica and other genera in Phyliceae (Rhamnaceae) were evaluated using sequences for the plastid trnL intron, the trnL-F intergenic spacer and the internal transcribed spacers of nuclear ribosomal DNA. Both regions provided nearly identical phylogenetic patterns, so they were analysed as a combined matrix. The genera Nesiota and Noltea were found to be palaeoendemic species within the context of the tribe. The island species of Phylica formed a monophyletic group together with the widespread mainland species, P. paniculata. The plesiomorphic, generalist morphology of this group contrasts with the derived morphological characteristics of the majority of mainland species. However, the group occupies a derived position in the phylogenetic trees, thus indicating either a reversal or more likely the retention of these primitive traits.
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Molecular data confirm the affinities of the south-west Australian endemic Granitites with Alphitonia (Rhamnaceae)
Kew Bulletin, 2001Co-Authors: Michael F. Fay, James E. Richardson, M. D. Lledo, B. L. Rye, Stephen D. HopperAbstract:Sobre la base de los datos de la secuencia de ADN, se confirma que las afinidades del genero Granitites (Rhamnaceae) recientemente descrito del sudoeste de Australia estan con Alphitonia, como sugirio Rye (1996), en lugar de miembros de Pomaderreae, como pensaron autores anteriores. . Los hallazgos de este estudio proporcionan una confirmacion molecular de que algunos componentes de la flora del suroeste de Australia pueden ser reliquias de antiguos linajes de la selva tropical
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A phylogenetic analysis of Rhamnaceae using rbcL and trnL-F plastid DNA sequences.
American journal of botany, 2000Co-Authors: James E. Richardson, Michael F. Fay, Quentin C. B. Cronk, Diane Bowman, Mark W. ChaseAbstract:Previous tribal classifications of Rhamnaceae have been based on fruit characters, resulting in the delimitation of large and otherwise heterogeneous groups. We evaluated the most recent classification with DNA sequences of two regions of the plastid genome, rbcL and trnL-F, from 42 genera of Rhamnaceae and representatives of the related families Elaeagnaceae, Barbeyaceae, Dirachmaceae, Urticaceae, Ulmaceae, Moraceae, and Rosaceae. The trnL-F trees have higher consistency and retention indices than the rbcL trees, and patterns of change in rbcL and trnL-F are compared. The closest relatives of Rhamnaceae are Dirachmaceae and Barbeyaceae, followed by the urticalean families. The plastid trees support the monophyly of the family and provide the basis for a new tribal classification. Three strongly supported clades are identified, but morphological characters could not be found to underpin a formal taxonomic description of these three clades as subfamilies. We therefore only recognize groups that are also defined by morphological characters. The biogeography of Rhamnaceae is discussed with reference to the molecular trees.
Frank Udovicic - One of the best experts on this subject based on the ideXlab platform.
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phylogenetic analysis and generic limits of the tribe pomaderreae Rhamnaceae using internal transcribed spacer dna sequences
Taxon, 2005Co-Authors: Jurgen Kellermann, Frank Udovicic, Pauline Y LadigesAbstract:The tribe Pomaderreae (Rhamnaceae) currently consists of approximately 180 species in seven genera, endemic to Australia and New Zealand. It is the second largest tribe of Rhamnaceae. We undertook a phylogenetic analysis using internal transcribed spacer (ITS) sequence data from 69 representative species of Pomaderreae and five outgroup taxa. The monophyly of Pomaderreae was confirmed. The clades found in the strict consensus tree are mostly consistent with the currently accepted genera of the tribe. All major clades, except Stenanthemum, received moderate to strong bootstrap and jackknife support. Only the relationship between Siegfriedia and Pomaderris received strong support; relationships between other genera did not receive support above 50%. Taxonomic changes are suggested and a preliminary classification of Pomaderreae is proposed, including the monophyletic genera Cryptandra, Pomaderris, Spyridium and Trymalium. Blackallia and Siegfriedia are monotypic. Two new genera are required: one containing two atypical species of Stenanthemum and the second genus consisting of previously unrelated species from three genera that share a 2-carpellate ovary and a characteristic indumentum. The taxonomic status of Stenanthemum requires further examination. A split of Cryplandra into smaller genera is not supported.
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Historical biogeography of Australian Rhamnaceae, tribe Pomaderreae
Journal of Biogeography, 2005Co-Authors: Pauline Y Ladiges, Jurgen Kellermann, Gareth Nelson, Christopher J. Humphries, Frank UdovicicAbstract:Aim To discover the pattern of relationships of areas of endemism for Australian genera in the plant family Rhamnaceae tribe Pomaderreae for comparison with other taxa and interpretation of biogeographical history. Location Australian mainland, Tasmania and New Zealand. Methods A molecular phylogeny and geographic distribution of species within four clades of Pomaderreae are used as a basis for recognition of areas of endemism and analysis of area relationships using paralogy-free subtrees. The taxon phylogeny is the strict consensus tree from a parsimony analysis of 54 taxa, in four clades, and sequence data for the internal transcribed spacer regions of ribosomal DNA (ITS1-5.8S-ITS2) and the plastid DNA region trnL-F. Results The biogeographical analysis identified five subtrees, which, after parsimony analysis, resulted in a minimal tree with 100% consistency and seven resolved nodes. Three sets of area relationships were identified: the areas of Arnhem and Kimberley in tropical north Australia are related based on the phylogeny of taxa within Cryptandra; the moister South-west of Western Australia, its sister area the coastal Geraldton Sandplains, the semi-arid Interzone region and arid Western Desert are related, based on taxa within Cryptandra, Spyridium, Trymalium and Pomaderris; and the eastern regions of Queensland, McPherson-Macleay, south-eastern New South Wales (NSW), Victoria, southern Australia, Tasmania and New Zealand are related based on Cryptandra, Pomaderris and Spyridium. Tasmania and NSW are related based entirely on Cryptandra, but the position of New Zealand relative to the other south-eastern Australian regions is unresolved. Main conclusions The method of paralogy-free subtrees identified a general pattern of geographic area relationships based on Australian Pomaderreae. The widespread distribution of clades, the high level of endemicity and the age of fossils for the family, suggest that the Pomaderreae are an old group among the Australian flora. Their biogeographical history may date to the early Palaeogene with subsequent changes through to the Pleistocene.
David R. Benson - One of the best experts on this subject based on the ideXlab platform.
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Diversity of Frankia Strains in Root Nodules of Plants from the Families Elaeagnaceae and Rhamnaceae
Applied and environmental microbiology, 1998Co-Authors: Michael L. Clawson, Margarita Carú, David R. BensonAbstract:Partial 16S ribosomal DNAs (rDNAs) were PCR amplified and sequenced from Frankia strains living in root nodules of plants belonging to the families Elaeagnaceae and Rhamnaceae, including Colletia hystrix, Elaeagnus angustifolia, an unidentified Elaeagnus sp., Talguenea quinquenervia, and Trevoa trinervis. Nearly full-length 16S rDNAs were sequenced from strains of Frankia living in nodules of Ceanothus americanus, C. hystrix, Coriaria arborea, and Trevoa trinervis. Partial sequences also were obtained from Frankia strains isolated and cultured from the nodules of C. hystrix, Discaria serratifolia, D. trinervis, Retanilla ephedra, T. quinquenervia, and T. trinervis (Rhamnaceae). Comparison of these sequences and other published sequences of Frankia 16S rDNA reveals that the microsymbionts and isolated strains from the two plant families form a distinct phylogenetic clade, except for those from C. americanus. All sequences in the clade have a common 2-base deletion compared with other Frankia strains. Sequences from C. americanus nodules lack the deletion and cluster with Frankia strains infecting plants of the family Rosaceae. Published plant phylogenies (based on chloroplast rbcL sequences) group the members of the families Elaeagnaceae and Rhamnaceae together in the same clade. Thus, with the exception of C. americanus, actinorhizal plants of these families and their Frankia microsymbionts share a common symbiotic origin.
