South Yarra, Australia
South Yarra, Australia

Time filter

Source Type

Miller J.T.,CSIRO | Murphy D.J.,National Herbarium of Victoria | Brown G.K.,University of Melbourne | Richardson D.M.,Stellenbosch University | Gonzalez-Orozco C.E.,CSIRO
Diversity and Distributions | Year: 2011

Aim Acacia is the largest genus of plants in Australia with over 1000 species. A subset of these species is invasive in many parts of the world including Africa, the Americas, Europe, the Middle East, Asia and the Pacific region. We investigate the phylogenetic relationships of the invasive species in relation to the genus as a whole. This will provide a framework for studying the evolution of traits that make Acacia species such successful invaders and could assist in screening other species for invasive potential. Location Australia and global. Methods We sequenced four plastid and two nuclear DNA regions for 110 Australian Acacia species, including 16 species that have large invasive ranges outside Australia. A Bayesian phylogenetic tree was generated to define the major lineages of Acacia and to determine the phylogenetic placement of the invasive species. Results Invasive Acacia species do not form a monophyletic group but do form small clusters throughout the phylogeny. There are no taxonomic characters that uniquely describe the invasive Acacia species. Main conclusions The legume subfamily Mimosoideae has a high percentage of invasive species and the Australian Acacia species have the highest rate of all the legumes. There is some evidence of phylogenetic clumping of invasive species of Acacia in the limited sampling presented here. This phylogeny provides a framework for further testing of the evolution of traits associated with invasiveness in Acacia. © 2011 Blackwell Publishing Ltd.

Lebel T.,National Herbarium of Victoria | Orihara T.,Tottori University | Maekawa N.,Tottori University
Fungal Diversity | Year: 2012

The sequestrate genus Chamonixia has been shown to have affinities to the Boletales, in particular the genus Leccinum. Australasian and Japanese species of Chamonixia were examined using morphological and molecular (ITS and nLSU rDNA) data and found to also have affinities with Leccinum and Leccinellum, however they form a distinct clade separate from the European type species C. caespitosa Rolland and North American species. A new genus, Rosbeeva T.Lebel & Orihara gen. nov., is proposed for the Australasian, Japanese and Chinese taxa. The species R. mucosa (Petri) T.Lebel comb. nov. is restricted in distribution to Singapore and Borneo, and R. pachyderma (Zeller & C.W. Dodge) T.Lebel comb. nov. to New Zealand, with Australian collections considered to belong to a revised R. vittatispora (G.W.Beaton, Pegler & T.W.K.Young) T.Lebel comb. nov. or a new species R. westraliensis T. Lebel sp. nov. The Chinese species R. bispora (B.C.Zhang & Y.N.Yu) T.Lebel & Orihara comb. nov is transferred to the new genus based upon morphological data. Two new species from Japan, Rosbeeva eucyanea Orihara and R. griseovelutina Orihara, are also described and illustrated. A key to all species of Rosbeeva is provided. Due to the highly modified gastroid sporocarp forms of both Chamonixia and Rosbeeva, many macroscopic characters of use in agaricoid taxonomy are difficult to interpret. However, color change and texture of sporocarps are of some use to distinguish genera and species. Microscopic characters such as spore shape, dimensions, and ornamentation, and pileipellis and hymenophoral trama structure, are essential for determining genera and species. © Kevin D. Hyde 2011.

Lebel T.,National Herbarium of Victoria | Syme A.,National Herbarium of Victoria
Mycologia | Year: 2012

Australian collections of sequestrate Agaricaceae were examined with morphological and molecular data (nuclear DNA from ITS and LSU), and the majority were found to belong to the genera Agaricus and Macrolepiota. Previously described Australian species of Endoptychum are transferred to the appropriate agaricoid genera and several new combinations proposed. Descriptions and illustrations are provided for these and eight new species: Agaricus eburneocanus sp. nov., A. chartaceus sp. nov., A. erythrosarx sp. nov., A. inilleasper sp. nov., A. pachydermus sp. nov., Macrolepiota gasteroidea sp. nov., M. vinaceofibrillosa sp. nov. and M. turbinata sp. nov. The sequestrate genus Barcheria is retained as a distinct taxon. Timing of evolution of sequestrate sporocarp forms in Macrolepiota, Chlorophyllum and Agaricus seems to have occurred in the past 15 000 000 y, and a stem age is approximately 65 000 000 y for Barcheria. © 2012 by The Mycological Society of America.

Brown G.K.,University of Melbourne | Murphy D.J.,National Herbarium of Victoria | Ladiges P.Y.,University of Melbourne
Cladistics | Year: 2011

Paraserianthes (tribe Ingeae) as circumscribed by Nielsen et al. includes four species and five subspecies in two sections endemic to Australia, Indonesia, New Guinea and the Solomon islands. An alternative classification, proposed by Barneby and Grimes, raised Nielsen's two sections to generic level, thereby reducing Paraserianthes to comprise just species, P. lophantha, and recognizing the genus Falcataria. Neither treatment has been adopted by all. Thus, a phylogenetic and systematic analysis of Paraserianthes is required to clarify the taxonomic circumscription of the genus and relationships among the species and subspecies. Furthermore, elucidation of the phylogenetic relationships of Paraserianthes is significant to an understanding of the evolutionary history and biogeography of Acacia sensu stricto (s.s.). The external transcribed spacer regions of nuclear ribosomal DNA and the rpl32-trnL intergenic spacer of chloroplast DNA were sequenced for all species of Paraserianthes, a representative sample of Acacia s.s. (phyllodinous group) and 18 other members of tribe Ingeae, including an outgroup Samanea tubulosa. These data were analysed with parsimony and Bayesian methods. The topologies of the resultant phylogenetic trees were congruent but with greater resolution in the Bayesian tree. The results show that Paraserianthes sensu Nielsen is paraphyletic and that P. lophantha is the sister group to Acacia, a finding supported by morphological characters. Paraserianthes shows a dual link between Australia and lands to the north. A western biogeographical track relates south-west Western Australia to Sumatra, Java, Bali and Flores (two subspecies of P. lophantha), and an eastern track relates north-east Queensland to the Moluccas, New Guinea, the Bismarck Archipelago and the Solomon Islands (P. toona and its relatives). © The Willi Hennig Society 2011.

Thompson I.R.,National Herbarium of Victoria
Muelleria | Year: 2011

A revision of the Australian-endemic genus Goodia Salisb. (Fabaceae: Bossiaeeae) is presented. Three new species are described: Goodia macrocarpa I.Thomps., G. parviflora I.Thomps., and G. stenocarpa I.Thomps. Goodia lotifolia Salisb. var. pubescens (Sims) H.B.Will, is returned to species status as G. pubescens Sims. A key to species and distribution maps are presented.

Thompson I.R.,National Herbarium of Victoria
Muelleria | Year: 2011

A taxonomic revision of Muelleranthus Hutch., Ptychosema Benth. and Aenictophyton A.T.Lee (Fabaceae: Bossiaeeae) is presented. All are Australian-endemic and species are found predominantly in arid or semiarid regions. A new genus, Paragoodia I.Thomps., is erected to accommodate Paragoodia crenulata (A.T.Lee) I.Thomps., which is transferred from Muelleranthus. Ptychosema anomalum F.Muell. is transferred to Aenictophyton and recombined as Aenictophyton anomalum (F.Muell.) I.Thomps. Two new species, Muelleranthus parvalatus I.Thomps. and M. obovatus I.Thomps, and one new subspecies, Aenictophyton reconditum subsp. macrophyllum I.Thomps., are described. Distribution maps and keys to species are presented. A revised key to genera in tribe Bossiaeeae is also presented.

Olearia adenophora (F.Muell.) Benth. is reduced to synonymy under O. tenuifolia (DC.) Benth., and a new name, O. curticoma N.G.Walsh, is provided for the population formerly treated as O. tenuifolia at Billygoat Bend on the Mitchell River in eastern Victoria.

Lebel T.,National Herbarium of Victoria
Mycological Progress | Year: 2013

The novel species Agaricus lamelliperditus and A. colpeteii are described and illustrated, and affinities to other taxa determined by analysis of ITS sequence data. Both taxa resemble several other recently described Australian sequestrate Agaricus species, in particular A. pachydermus, A. wariatodes and A. chartaceus, which all have a powdery hymenophore from very early stages of basidiome formation. Both novel species have affinities to section Minores. © 2012 German Mycological Society and Springer-Verlag Berlin Heidelberg.

Syme A.E.,National Herbarium of Victoria
Plant Systematics and Evolution | Year: 2012

Patterns seen in other Australian flora have led to hypotheses that early Miocene shifts in climate drove rapid radiation of major taxonomic groups such as Eucalyptus. Little is known about absolute dates and rates for Australian monocots, particularly grasses. I tested this early Miocene radiation hypothesis for Australian grasses using a calibrated phylogeny of the endemic stipoid genus Austrostipa and an analysis of diversification rates. The phylogeny was developed from a Bayesian likelihood analysis of the nuclear internal transcribed spacers region, and three calibration points were set based on fossil evidence. The results indicate that the genus arose in the early Miocene and underwent a species radiation, but the rate of diversification was not rapid compared to the current rate or to those of other taxa. Following an 8 million year period of fast molecular evolution but no taxonomic radiation, diversification rates have been constant for the past 15 million years. Comparable measures such as the gamma statistic can be used across taxa to make general conclusions about evolutionary rate constancy. © 2011 Springer-Verlag.

Lebel T.,National Herbarium of Victoria | Vellinga E.C.,University of California at Berkeley
Mycological Progress | Year: 2013

The novel Australian sequestrate species Lepiota geogenia is described and illustrated. It is characterized by globose to subglobose sporocarps that stain pale yellow with handling, and fusiform, asymmetric spores. Lepiota geogenia is a member of sect. Lepiota, to which the sequestrate western American Cryptolepiota spp, Lepiota viridigleba, and the European slightly secotioid L. sardoa also belong. We place the Cryptolepiota species within Lepiota, and provide two new names and one new combination. © 2012 German Mycological Society and Springer-Verlag Berlin Heidelberg.

Loading National Herbarium of Victoria collaborators
Loading National Herbarium of Victoria collaborators