Looks like they could be some sort of Riccardia sp. Or maybe Riccia.Those thalloids are in some of my moss too.
All sorts of interesting stuff shows up in my Sphagnum. I find liverworts and lichens fascinating so most of them I just let be. Some of the other mosses that grow in there are becoming the bane of my existence with the way they take over though.Those thalloids are in some of my moss too.