Resurrection and emendation of the Hypoxylaceae, recognised from a multigene phylogeny of the Xylariales

PERSOH, DEREK; ROMERO, ANDREA I.; HEITKMPER, SIMONE; SRIKITIKULCHAI, PRASERT; HLADKI, ADRIANA I.; WENDT, LUCILE; KUHNERT, ERIC; SRIKITIKULCHAI, PRASERT; STADLER, MARC; HLADKI, ADRIANA I.; STADLER, MARC; LUANGSA-ARD, J. JENNIFER; KUHNERT, ERIC; LUANGSA-ARD, J. JENNIFER; LAMBERT, CHRISTOPHER; LAMBERT, CHRISTOPHER; SIR, ESTEBAN BENJAMIN; SIR, ESTEBAN BENJAMIN; PERSOH, DEREK; ROMERO, ANDREA I.; HEITKMPER, SIMONE; WENDT, LUCILE

MYCOLOGICAL PROGRESS

SPRINGER HEIDELBERG

Año: 2018

1617-416X

A multigene phylogeny was constructed, includinga significant number of representative species of the mainlineages in the Xylariaceae and four DNA loci the internaltranscribed spacer region (ITS), the large subunit (LSU) of the nuclear rDNA, the second largest subunit of the RNApolymerase II (RPB2), and beta-tubulin (TUB2). Specimenswere selected based on more than a decade of intensive morphologicaland chemotaxonomic work, and cautious taxonsampling was performed to cover the major lineages of the Xylariaceae; however, with emphasis on hypoxyloid species. The comprehensive phylogenetic analysis revealed a clear-cutsegregation of the Xylariaceae into several major clades, which was well in accordance with previously established morphological and chemotaxonomic concepts. One of these clades contained Annulohypoxylon, Hypoxylon, Daldinia, andother related genera that have stromatal pigments and anodulisporium-like anamorph. They are accommodated inthe family Hypoxylaceae, which is resurrected and emended. Representatives of genera with a nodulisporium-likeanamorph and bipartite stromata, lacking stromatal pigments(i.e. Biscogniauxia, Camillea, and Obolarina) appeared in aclade basal to the xylarioid taxa. As they clustered withGraphostroma platystomum, they are accommodated in theGraphostromataceae. The new genus Jackrogersella with J. multiformis as type species is segregated from Annulohypoxylon. The genus Pyrenopolyporus is resurrectedfor Hypoxylon polyporus and allied species. The genusDaldinia and its allies Entonaema, Rhopalostroma,Ruwenzoria, and Thamnomyces appeared in two separate subclades, which may warrant further splitting of Daldiniain the future, and even Hypoxylon was divided in severalclades. However, more species of these genera need to bestudied before a conclusive taxonomic rearrangement can beenvisaged. Epitypes were designated for several importantspecies in which living cultures and molecular data are available, in order to stabilise the taxonomy of the Xylariales.