Jan Holec

Ossicaulis lachnopus (Agaricales, Lyophyllaceae), a species similar to O. lignatilis, is verified by morphological and molecular methods

Identity of Ossicaulis lachnopus and O. lignatilis was studied using both classical and molecular methods. While O. lignatilis is a well-known species, O. lachnopus is almost unknown, having been resurrected to modern mycology by M. Contu in 2000. Based on collections from six European countries, both classical and molecular methods independently proved that the species really represent two separate entities. They form two well-supported clades that correlate to morphologically separable groups. The most important distinguishing characters are the size of spores, especially their length, and a pileus colour. O. lachnopus has small spores and a grey or beige-grey tinged pileus, whereas O. lignatilis has larger spores and a whitish to cream pileus, with a slight beige-greyish tinge at most. In this paper, we discuss taxonomy, ecology and distribution of both species and propose a preliminary key for their identification.

Tricholomopsis flammula (Basidiomycota, Agaricales)—molecular taxonomy, delimitation, variability and ecology

Tricholomopsis flammula, recently validated, was studied by molecular methods to clarify its taxonomic position. Sequences of T. flammulla form a distinct clade sister to a well-supported clade of T. rutilans sequences, whereas T. decora forms a cluster standing apart from them. T. flammula really is a good species separate from T. rutilans and T. decora, well distinguishable both phenotypically and molecularly. The infraspecific variability revealed by molecular methods is expressed in slight differences among some of the collections studied. The brief characteristics, selected descriptions and illustrations, key diagnostic characters and data on habitats and substrates of T. flammula are given. A discussion on variability of its basidiocarps is added.

Galerina saxicola (Fungi, Agaricales) is conspecific with G. stordalii and new data on ecology of the latter species

The holotype of Galerina saxicola Svrček, a never revised species described from the Czech Republic in 1994, was studied in detail. Due to its poor state and the impossibility to obtain DNA data, we fixed its taxonomic position by designating an epitype using recent material from the type locality. The species proved to be conspecific with Norwegian and Czech collections of Galerina stordalii A.H.Sm., both morphologically and molecularly. Full synonymy and diagnostic characters of G. stordalii are provided, its morphological and ecological variability is discussed, and information on type specimens is corrected. Our collections document that G. stordalii has a broader ecological amplitude than thought before, living not only on Sphagnum and peat in boreal and arctic-alpine habitats like bogs and snow beds, but also among mosses in boggy spruce forests, on decaying conifer trunks in old-growth forests and on moist sandstone rocks in a river canyon under the influence of climatic inversion.