There are a number of fish lineages which have both gills and lungs (as do amphbians, at least at some stages of their life cycle), so the transition from fish to land-dweller isn't as strange or "difficult" as it might seem at first glance. Start with gills, at some point add an auxilliary air-storage bag (such as the swim bladder), the bag develops in stages over time into a more fully functional lung, then as the lineage spends more and more time on land, the gills become a useless vestage and fade away as the lungs become the exclusive oxygen-gathering system. Various stages of this transition can be found in numerous extant species.
Yes, I understand this, however, it would be interesting to see, in the above-refferenced critter, what kind of breathing apparatus it had.
Details? Proposed mechanism?
If you want to point me to a link (no pun intended), that's fine. But I'm not doing this for flamebait--if you wish send me a private freepmail and I'll explain my question in greater detail...
Cheers!