Hapalopilus croceus is a rare, wood-decay polypore associated with old coarse broadleaf trees, primarily Quercus. It is mainly distributed throughout the temperate zone of the Northern Hemisphere with its main distribution in Europe. Mating systems in fungi influence the probability of in- or outbreeding and may affect the species’ fitness. We found the mating system of H. croceus to be bipolar by pairing 18 single spore isolates from one sporocarp. We discuss this finding from the perspective of H. croceus as a threatened species with a very small and fragmented current population associated with a declining habitat and globally red-listed as Vulnerable (VU).

Hapalopilus croceus是一种稀有的木质腐烂多孔，与古老的阔叶树（主要是栎属）相关。它主要分布在北半球的温带地区，主要分布在欧洲。真菌中的交配系统影响近交或近交的可能性，并可能影响物种的适应性。通过配对来自一个果皮的18个单孢子分离株，我们发现了大花克劳斯的交配系统是双极的。我们从H. croceus濒危物种的角度讨论了这一发现，H。croceus是一种濒临灭绝的物种，其当前种群很小且零散，与栖息地的减少有关，并且在全球范围内被列为脆弱（VU）。