4a -With a central or lateral stipe
                             
                                                  4b -Fruitbodies in crust
                             
                                                  4c -Round or angular pores – Fruitbodies effused-reflexed
                             
                                                  4d -Round or rectangular pores, to labyrinthine, or lacerated
                             
                                                  4e -Round to angular pores, small and numerous fruitbodies
                             
                                                  4f -Round to angular pores, medium to large fruitbodies