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Lepidostromataceae

Lepidostromatales
Lepidostroma vilgalysii, type collection, in the field, 2007.jpg
Lepidostroma vilgalysii
Scientific classification
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Lepidostromatales
& Lücking (2013)
Family: Lepidostromataceae
Ertz, Eb. Fischer, Killmann, Sérus. & Lawrey
Genera

Lepidostromatales is an order of fungi in the class Agaricomycetes. It is the only known order of basidiomycete fungi composed entirely of lichenized members. Morphologically, the fruiting bodies of all species are clavarioid. Six species are known, five of which were described within the span of 2007-2013. Due to its morphological similarity to the genus Multiclavula, its isolated phylogenetic position (distinct from all other orders based on molecular data) was not understood until quite recently. The photobionts that have been found in association with members of this group are not known to associate with any other types of lichenized fungi.

Members of Lepidostromatales closely resemble species of Multiclavula because these groups share a combination of clavarioid fruiting bodies and lichenized thalli. The first species described in the order was originally described in the genus Clavaria due to the clavarioid fungal fruiting body, and was later transferred to Multiclavula (Cantharellales) due to the lichenized thallus. The group was first recognized as distinct on account of the small squamules (scale-like structures) that make up the thallus, and the genus Lepidostroma was created as a result. With the addition of two more squamulose species discovered in tropical Africa, this separation was not accepted and Multiclavula was again emended to include species with squamulose thalli. However, molecular phylogenetic analyses eventually confirmed Lepidostroma as a distinct lineage, Lepidostromataceae, unrelated to Multiclavula. The recent discovery of three further species (for a total of six species), created an opportunity for more in-depth phylogenetic research, which confirmed the isolation of the family from all described orders. As a result, the group was raised to the rank of order (Lepidostromatales).


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