Phylogenetic reappraisal and epitypification of Laccaria macrocystidiata (Hydnangiaceae, Basidiomycota)

Abstract

Laccaria macrocystidiata, a marasmioid species, originally described as Laccaria affinis f. macrocystidiata from Central Italy, was synonymised with the North American taxon Laccaria laccata var. pallidifolia, but only on a morphological basis. In this paper, the independent position of L. macrocystidiata from L. laccata var. pallidifolia and other species of Laccaria is pointed out on the basis of ITS-LSU phylogenetic analyses. According to our results, Laccaria macrocystidiata var. longispinosa is considered a synonym of Laccaria macrocystidiata. Laccaria macrocystidiata holotype consists of only one basidioma in poor condition; thus, a new epitype from an Italian collection was designated.

New records and noteworthy data of plants, algae and fungi in SE Europe and adjacent regions, 8

“…Described as a form of L. affinis (Singer) Bon (Migliozzi & Lavorato 1988), the independent status of L. macrocystidiata was recently affirmed with phylogenetic evidence by Dovana et al (2021), also confirming that it is a widespread, but previously unrecognized species.…”

“…The macroscopic characters which may suggest the preliminary identification of L. macrocystidiata are relatively robust basidiomata, notably squamulose pilei and concolorous or even darker than the pilei, fibrillose stipe. Microscopically, the combination of predominantly globose basidiospores, 4-spored basidia and long cheilocystidia set this species apart (Migliozzi & Lavorato 1988;Pázmány 1994;Contu 2003;Dovana et al 2021).…”

“…On the Balkan Peninsula it is so far only known from Greece (Dovana et al 2021). Here we include the first Bulgarian records and the additional nrITS-barcoded specimen from Greece.…”