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.
Walsh N.,National Herbarium of Victoria
Muelleria | Year: 2014
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.
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.
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.