Why not a lacto infection? Looks a bit like the infection I had which I was told was lacto. (But then again looks a little different too. A little more wispy in form. My supposed lacto formed a similar pattern but a bit more "fractal" looking. [Tighter formation.])
Definately a pellicle.
Maybe you can ignore it. I'm got my infected pale ale sitting in carboy in my closet for a few months so far with the intent to make a sour and I'm hoping someone somewhere will tell me how the eff to do that (all I've gotten seems to be you let it ferment/condition for "a longer period of time"; um... okay... ).
After that my ESB got infected and I figured **** it; I can't handle this. Denial works well for me when my family members die of cancer so maybe denial will work well for me when my beer is infected. So I just bottled it as though nothing were wrong. And, actually, it's really fantastic great tasting beer.
Then again maybe I was *really* lucky.
Good luck... but you're infected. Definitely.