title: Drought meets acid: three new genera in a dothidealean clade of extremotolerant fungi.
abstract: Fungal strains isolated from rocks and lichens collected in the Antarctic ice-free area of the Victoria Land, one of the coldest and driest habitats on earth, were found in two phylogenetically isolated positions within the subclass Dothideomycetidae. They are here reported as new genera and species, Recurvomyces mirabilisgen. nov., sp. nov. and Elasticomyces elasticusgen. nov., sp. nov. The nearest neighbours within the clades were other rock-inhabiting fungi from dry environments, either cold or hot. Plant-associated Mycosphaerella-like species, known as invaders of leathery leaves in semi-arid climates, are also phylogenetically related with the new taxa. The clusters are also related to the halophilic species Hortaea werneckii, as well as to acidophilic fungi. One of the latter, able to grow at pH 0, is Scytalidium acidophilum, which is ascribed here to the newly validated genus Acidomyces. The ecological implications of this finding are discussed.
authors.affiliation: DECOS, Università degli Studi della Tuscia, Largo dell'Università, Viterbo, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Selbmann
authors.forename: G S
authors.initials: GS
authors.lastname: de Hoog
authors.forename: L
authors.initials: L
authors.lastname: Zucconi
authors.forename: D
authors.initials: D
authors.lastname: Isola
authors.forename: S
authors.initials: S
authors.lastname: Ruisi
authors.forename: A H G Gerrits
authors.initials: AH
authors.lastname: van den Ende
authors.forename: C
authors.initials: C
authors.lastname: Ruibal
authors.forename: F
authors.initials: F
authors.lastname: De Leo
authors.forename: C
authors.initials: C
authors.lastname: Urzì
authors.forename: S
authors.initials: S
authors.lastname: Onofri