I believe it's more like this:

Hoplitai (late) (1)
Peltastai (early) - Peltastai (late) (2)

Now (1)+(2) produced the Iphikratides, or Hoplitai (late) (3)

Then (3) gave birth to Phalangitai.

In any case, Peltasts seem to play a major rol in this game. It's really more confusing than you may think

Maion