maybe someone has taken this already, but I'll give it a go after reading so many iterations of your request:
Species A gives rise to species B1 and B2.
Species B1 cannot interbreed at all with B2 or A. Species B2 can interbreed with A, but the resulting offspring are sterile.
Species A eventually "dies" out - the similar-to-A species B1 and B2 fill the ecological niche. In the meantime, at the fringes of the B populations, new adaptations are giving rise to species B1(C1, C2) and B2(C3, C4, and C5).
The "C" series are still quite similar to species A, but demonstrate not only genetic divergence but rudimentary morphological divergences.
(etc...etc...etc...)
a few million years later, after repetitions of the speciation process, there have been several hundred daughter lines of speciation, most of which are extinct, and a few which thrive. These are species X27, X35, Y205, and Z13. None of these current species resemble species A even slightly.
get it?