Category Archives: Volume 54(1) 2014

Hirticlavula elegans, a new clavarioid fungus from Scandinavia

Authors: Petersen, Jens H. & Davey, Marie L. & Læssøe, Thomas
Journal: Karstenia, Volume 54 (2014), Issue 1, pages 1-8.
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Key words: Clavariaceae, taxonomy, phylogeny, Hirticlavula

Based on material from Denmark and Norway the new clavarioid genus Hirticlavula with one species, H. elegans, is described. It produces tiny, hyaline white basidiomata with upward pointing blunt ended hairs. Phylogenetic analysis of the LSU region of rDNA strongly supports the inclusion of this fungus in the Clavariaceae sensu stricto where it occupies a position sister to all members of Clavaria, Camarophyllopsis, and Hodophilus. It has been found from May to October fruiting on wet, rotten hardwood bark on the ground, and its lignicolous, saprophytic nutritional mode further distinguishes it from other members of the Clavariaceae.

Chlorostroma vestlandicum sp. nov., a host-specific mycoparasite on Hypoxylon vogesiacum from western Norway

Authors: Nordén, Björn & Jordal, John B. & Læssøe, Thomas
Journal: Karstenia, Volume 54 (2014), Issue 1, pages 9-13.
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Key words: Xylariales, stromatic, pyrenomycete, temperate deciduous forest, coarse woody debris, Ulmus glabra

The new species Chlorostroma vestlandicum is described from coarse dead wood of Ulmus glabra in western Norway. It was invariably found in close association with Hypoxylon vogesiacum and appears to be mycoparasitic on this species. With a strikingly orange entostroma, tiny perithecia and specialized habitat association it is a highly distinctive species. C. vestlandicum differs from the type species by the color of the entostroma (bright yellow orange as opposed to ochraceous), iodine reaction of the apical apparatus, ascospores (more or less ellipsoid as opposed to more or less cuboid). The surface is not green or bluegreen as in the previously described species, albeit dark greenish blackish in section. Its distribution seems to cover mainly the hemiboreal regions of western Norway, an area not yet affected but threatened by Dutch elm disease. It is probably a rare species restricted to the most dead wood rich sites with big populations of H. vogesiacum.

Inocybe leiocephala, a species with an intercontinental distribution range – Disentangling the I. leiocephala – Subbrunnea – catalaunica morphological species complex

Authors: Larsson, Ellen & Vauras, Jukka & Cripps, Cathy L.
Journal: Karstenia, Volume 54 (2014), Issue 1, pages 15-39.
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Key words: Inocybe, Agaricales, taxonymy, morphological species complex, molecular systematics, arctic-alpine mycology

Sequence data and morphological characteristics of specimens determined as Inocybe leiocephala were compared with six type specimens. We confirm I. leiocephala, I. lindrothii, I. subbrunnea, I. fuscescentipes, I. subpaleacea and I. catalaunica as separate independent species. All species except I. subpaleacea and I. catalaunica were shown to have a broad intercontinental distribution range. Inocybe leiocephala has its main distribution in arctic-alpine and subalpine habitats, and I. lindrothii in hemiboreal – boreal zones. Inocybe subbrunnea is confined to nutrient rich, often more calcareous soils and mixed coniferous forests. Both I. fuscescentipes and I. subpaleacea, described from the alpine zone, also grow in boreal forests. Inocybe catalaunica is a species well separated from I. leiocephala, I. lindrothii and I. subbrunnea in molecular data and it appears to be more related to I. tjallingiorum and I. phaeoleuca despite macro-morphological similarities to the I. leiocephala group. The new species I. ohenojae is described here based on material from the alpine zone in Canada. The new combination Inocybe lindrothii is proposed and an epitype is designated. Inocybe saponacea is regarded as a synonym of I. lindrothii. A key to the species is provided.