I suspect this is due to when books were published but in a home game my answer would be that obviously an Eagle Shaman Druid could take the Eagle Domain, a Plains Druid the Plains Domain etc (there aren't matching domains for all shamans or terrain Druids but at a home game I'd probably even work with a player to make one)
But for PFS play I don't know if it is allowed. It sure seems logical and right that an eagle shaman would have the eagle domain (and an eagle familiar, evasion while flying etc) but I'm not sure how to interpret RAW.
A related but seperate question would be which animal or terrain domains as allowed for a given god if your Druid worships a specific god in Golarion? (and similarly which animal or terrain domains are open to clerics?)
