mention any one delimitations of the first term?
Most of them have a poroid hymenium.
Polypore
Most polypores have a poroid hymenium, but not all species. 
what kind of species is phellinus ellipsoideus? Polypore fungus in the family Hymenochaetaceae
wiki:12128647
Polypore [SEP] Delimitation (morphology)
Most polypores have a poroid hymenium, but not all species. A few, for instance "Elmerina holophaea" and "Lenzites betulina", form gills like agarics but are still considered polypores, since in all other respects they are similar to closely related polypores, forming tough fruiting bodies on the wood. A couple of species where the tubes have not fused together in a honey-comb manner are variably classified as polypores or not (e.g. "Porotheleum fimbriatum"). There's no clear distinction between polypores and hydnoid fungi - some polypores with irregularly poroid lower surface have been considered both polypores and hydnoid fungi (e.g. "Echinodontium tinctorium", "Irpex lacteus").