:I'm afraid my knowledge of barnacle anatomy is very poor indeed – it seems to have so little to do with that of any other crustaceans! Does this help? 
 :It does indeed look like we'll have to update some other articles, too. Goose barnacle will lose its taxobox, and we'll need new articles for each of the new orders (former sub-orders, for the most part). I haven't seen the body of the paper by Buckeridge and Newman, so I can't see why they couldn't maintain Pedunculata as a super-order – presumably it's not thought to be monophyletic. I think it's OK for our taxonomy to lag a little behind the primary literature, although this was published nearly 7 years ago, so we probably ought to update it. Remind me in the new year if neither of us has done anything about it by then. I'm still not sure if Pollicipes mitella Sowerby, 1833 ≡ Pollicipes mitella Linnaeus, 1758, but I guess that's a fairly minor worry.