has it been used for any medicine?
Medicinal mushroom polypores in use today are "Ganoderma lucidum coll."
Polypore
Medicinal mushroom polypores in use today are "Ganoderma lucidum coll." 
what kind of species is phellinus ellipsoideus? Polypore fungus in the family Hymenochaetaceae mention any one delimitations of the first term? Most of them have a poroid hymenium. and what is its indicator vlaue? They have been used as indicator species of healthy natural forests or old-growth forests in Europe.
wiki:12128650
Polypore [SEP] Medicinal uses
Most polypores are edible or at least non-toxic, however one genus of polypores has members that are poisonous. Polypores from the genus "Hapalopilus" have caused poisoning in several people with effects including kidney dysfunction and deregulation of central nervous system functions. Some polypores have been used in ritual and for utilitarian purposes for ages; the famous Ötzi the Iceman was found carrying two different polypore species: "Piptoporus betulinus", notable for its long usage in European folk medicines, and "Fomes fomentarius", which was likely used for starting fires. Medicinal mushroom polypores in use today are "Ganoderma lucidum coll." (reishi or lingzhi), "Trametes versicolor" (turkey tail) and "Ganoderma applanatum" (Japanese Kufuki-saru-no-koshikake).