Material collections, greenhouse planting experiment, fungal strains, media and culture conditions
The records on the geographical distributions and substrate information of A . vulgare and S . stephanocystis were extracted from data deposited in the Global Biodiversity Information Facility (GBIF; https://www.gbif.org/). The information on substrates and distributions of the following four species A .orientale , A . microsporum , S .luchuensis and S . pachycystidiatus was primarily from the published literature and our own observations during field investigations in China. In order to directly observe the characteristics of pinecone decomposition by Auriscalpium andStrobilurus , a planting experiment was conducted in the greenhouse using the cones of P . armandii fully colonized by A . microsporum collected in the forest in which bothAuriscalpium and Strobilurus existed.
All seven strains used for de novo sequencing were dikaryotic strains isolated directly from the fruiting bodies from wild mushrooms. Among these, the following five species and strains were collected in Yunnan Province, China: A .microsporum(strain AU-H-210),A .orientale (strain AU-Y-A),S .luchuensis (strain Y-Y-2D),S .pachycystidiatus (strain Y-H-6C) andS .orientalis (strain K-1-1). The remaining two A .vulgare (CBS 236.39) andS .stephanocystis (CBS 113577) were obtained from the Westerdijk Fungal Biodiversity Institute (CBS, Fungal Biodiversity Centre in Netherlands). The strains were stored at 4 °C on MEA solid medium (1 % malt extract, 0.1 % peptone and 1.5 % agar). Vegetative mycelia of those strains were cultivated in MEA liquid medium (1 % malt extract and 0.1 % peptone) in the dark at 23 °C for 7–25 days, and then the mycelia were collected for DNA extraction and whole genome sequencing (Mayjonade et al., 2016).