what kind of species is phellinus ellipsoideus?
Polypore fungus in the family Hymenochaetaceae
Phellinus ellipsoideus
Phellinus ellipsoideus (formerly Fomitiporia ellipsoidea) is a species of polypore fungus in the family Hymenochaetaceae, a specimen of which produced the largest fungal fruit body ever recorded. 
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Phellinus ellipsoideus [SEP] Introduction
Phellinus ellipsoideus (formerly Fomitiporia ellipsoidea) is a species of polypore fungus in the family Hymenochaetaceae, a specimen of which produced the largest fungal fruit body ever recorded. Found in China, the fruit bodies produced by the species are brown, woody basidiocarps that grow on dead wood, where the fungus feeds as a saprotroph. The basidiocarps are perennial, allowing them to grow very large under favourable circumstances. They are resupinate, measuring or more in length, though typically extending less than a centimetre from the surface of the wood. "P. ellipsoideus" produces distinct ellipsoidal spores, after which it is named, and unusual setae.