Ronald Petersen - Academia.edu (original) (raw)

Papers by Ronald Petersen

MycoKeys

Jakob Emanuel Lange (1864–1941), Danish mushroom taxonomist and illustrator, was an agricultural ... more Jakob Emanuel Lange (1864–1941), Danish mushroom taxonomist and illustrator, was an agricultural educator and economic philosopher. A follower and translator of the American Henry George, Lange was Headmaster of a “Small-holders High-School,” which served as a model for American folk-schools. Lange visited North America on three occasions. The first, in 1927, relied on his professional expertise; the second, in 1931, was purely mycological; and the third, 1939, was a combination of the two. All of this was lived against two World Wars and the Great Depression. This paper summarises the circumstances of Lange’s life against a background of the American mycologists of the day, the ominous events over his adult lifetime and his magnum opus, “Flora Agaricina Danica”, of five volumes illustrating ca. 1200 species on 200 coloured plates.

Mycologia, Jan 30, 2017

Reports of true morels (Morchella) fruiting on conifer burn sites are common in western North Ame... more Reports of true morels (Morchella) fruiting on conifer burn sites are common in western North America where five different fire-adapted species of black morels (Elata Clade) have been documented based on multilocus phylogenetic analyses. Fruiting of post-fire morels in eastern North America, by comparison, are rare and limited to a report from Minnesota in 1977 and eastern Ontario in 1991. Here, nuc rDNA internal transcribed spacer (ITS1-5.8S-ITS2 = ITS) sequences were used to identify the post-fire morel that fruited in great abundance the year following the 2012 Duck Lake Fire in the Upper Peninsula of Michigan and after the 2016 large-scale fire in the Great Smoky Mountains National Park in Tennessee as M. exuberans. A preliminary phylogenetic analysis suggests that the collections from eastern North America may be more closely related to those from Europe than from western North America, Europe, and China.

New Zealand Journal of Botany, 1992

Intracollection and intercollection crosses between single-spore isolates were carded out for Hyp... more Intracollection and intercollection crosses between single-spore isolates were carded out for Hypholoma brunnea, Pleurotopsis longinqua, and Pleurotus rattenburyi. All three species were found to be governed by bifactorial mating systems, and intercollection matings within each species proved compatible. Basidiome descriptions are furnished for P. longinquus and P. rattenburyi.

Mycological Progress, 2007

Mycologia, Jan 3, 2015

Collections of a pleurotoid fungus from dead aspen in eastern Russia were initially identified as... more Collections of a pleurotoid fungus from dead aspen in eastern Russia were initially identified as Lentinus sp., then as Phyllotopsis nidulans. DNA sequencing of cultures derived from these specimens using the nuclear ribosomal 28S (nrLSU) and nuclear ribosomal ITS1-5.8S-ITS2 regions (nrITS) showed that they were neither Lentinus nor Phyllotopsis and were not related to other pleurotoid genera Hohenbuehelia and Pleurotus. Subsequent investigation showed that the Russian fungus was the same as Pleurotus vetlinianus described from Poland. A new genus, Lignomyces, is described and characterized and L. vetlinianus comb. nov. is proposed.

Mycologia, Jan 21, 2015

European, North American and northeastern Asian collections of Xeromphalina section Xeromphalina ... more European, North American and northeastern Asian collections of Xeromphalina section Xeromphalina were studied by sequencing the nuc rDNA ITS1-5.8S-ITS2 and 28S 5' regions and partial RNA polymerase II second largest subunit gene (RPB2). Previously designated Xeromphalina campanella I is designated X. campanella s. str. and a neotype for this species from the topotype region is established. This species is shown to be a discrete, cold-tolerant organism that is distributed across North America and Eurasia and does not exhibit significant geographical partitioning. A second closely related phylogenetic species previously designated X. campanella II, proposed as X. enigmatica, cannot be distinguished from X. campanella morphologically but is reproductively isolated and is sympatric with X. campanella across much of Eurasia and North America. Unlike X. campanella it shows geographical partitioning and some of the geographical populations likely has become reproductively isolated. Phy...

New Zealand Journal of Botany, 1989

Two new species of Marasmius are described, illustrated, and compared with phenetically similar t... more Two new species of Marasmius are described, illustrated, and compared with phenetically similar taxa. Marasmius pusillissimus (sect. Epiphylli subsect. Epiphyllini) andM. r o sulatus (sect. Marasmius subsect. Marasmius) form minute basidiomata on monocotyledonous leaves.

MycoKeys, 2014

Two species of Ramaria from the Ozark region of Arkansas, USA, R. admiratia and R. calvodistalis,... more Two species of Ramaria from the Ozark region of Arkansas, USA, R. admiratia and R. calvodistalis, are proposed as new. They are described morphologically and placed molecularly within a large clade including taxa of ramarioid and cantharelloid fungi.

Plant Systematics and Evolution, 1998

Page 1. Pl. Syst. Evol. 211:217-229 (1998) ùPlant-Systematics and Evolution © Springer-Verlag 199... more Page 1. Pl. Syst. Evol. 211:217-229 (1998) ùPlant-Systematics and Evolution © Springer-Verlag 1998 Printed in Austria Mating systems in Omphalotus (Paxillaceae, Agaricales) RONALD H. PErERSEN and KAREN W. HUGHES ...

Mycoscience, 1999

Recently published taxonomic circumscriptions for taxa within Flammulina encouraged mating studie... more Recently published taxonomic circumscriptions for taxa within Flammulina encouraged mating studies to confirm or reject these names or taxa. Three categories of pairing experiments were performed: 1) self-crosses of monokaryon isolates of exemplars of various putative taxa; 2) inter-exemplar pairings among exemplar strains; and 3) pairings between exemplars and 87 unidentified strains which were grouped on this basis. Mating experiments could distinguish F. velutipes from other taxa, but not among infraspecific taxa of F. velutipes (vars. velutipes, lactea, and lupinicolaJ and monokaryons of all these taxa were partially compatible with those of F. ononidis. Likewise, isolates of F. rossica and F. elastica were partially compatible with one another but incompatible with those of other taxa. All other taxa (F. mexicana, F. stratosa, F. populicola, F. fennae) appeared to be genetically isolated. Low levels of interspecific hybridization between F. velutipes and F. populicola, and between F. velutipes and F. rossicalelastica were also noted.

Mycological Progress, 2004

Mycologia, 2000

Page 1. Mycologia, 92(6), 2000, pp. 1064-1070. ? 2000 by The Mycological Society of America, Lawr... more Page 1. Mycologia, 92(6), 2000, pp. 1064-1070. ? 2000 by The Mycological Society of America, Lawrence, KS 66044-8897 Flammulina RFLP patterns identify species and show biogeographical patterns within species Andrew ...

Mycological Research, 1993

Marasmius candidus var. setulosus is recombined as Marasmiellus tenerrimus var. setulosus, and Co... more Marasmius candidus var. setulosus is recombined as Marasmiellus tenerrimus var. setulosus, and Collybia flaccida is recombined as Marasmiellus flaccidus. Redescriptions of M. tenerrimus var. setulosus and Marasmiellus opacus are provided, including documentation of culture morphology and mating behaviour, and for the first time both taxa are reported to form rhizomorphs. Marasmiellus tenerrimus var. setulosus, M. opacus and M. candidus are bifactorial and multiallelic, and M. tenerrimus var. setulosus is sexually incompatible with M. candidus. All taxa are illustrated and compared with phenetically similar taxa.

Mycoscience, 2007

The Pacifi c Ocean and the "Pacifi c Rim" include a vast geographic area and most categories of t... more The Pacifi c Ocean and the "Pacifi c Rim" include a vast geographic area and most categories of the earth's ecological niches. As could be expected, macrofungi conform to many distribution patterns, some of which are discussed in this article. An introduction to species concepts and some other ancillary methodological considerations is followed by examples of some distributional patterns: Gondwanan, Transberingian, and island biogeographic. Some considerations of changing distributional patterns are also discussed: widening distributions, probable human mediation, and some unique cases that seem not to conform to accepted patterns. Not surprisingly, we conclude that concerted future collecting and comparison of specimens using multiple methodologies offer the only hope for understanding mushroom distributions, regardless of the geographic area of interest.

Revista iberoamericana de micología, 2002

Specimens belonging to the genus Pleurotus were collected growing on fallen trunks of Araucaria a... more Specimens belonging to the genus Pleurotus were collected growing on fallen trunks of Araucaria araucana, a native tree with a poorly known mycoflora, which grows in Patagonia, Argentina. Fruitbodies were produced in culture on sawdust from an isolated strain. Interspecific pairing tests performed between mating types of Pleurotus from Patagonia and tester strains of P. pulmonarius and P. ostreatus showed the Patagonia strain to be 100% compatible with P. ostreatus and incompatible with P. pulmonarius. Dikaryons obtained on sawdust were fertile, since they were able to produce fruitbodies and viable spores. This is the first documented record of P. ostreatus from Argentina and the first gilled fungus found growing on Araucaria araucana.