A pellicle is not necessary and just indicates the exposure of the beer to oxygen. If you don't have headspace, you'll be reducing oxygen exposure and probably won't get much, if any, of a pellicle.
Primary: De Bom sour (Gen. 2), De Bom/Embrace the Funk Brett blend saison'ish beer
Secondary/Aging: ECY01 Sour #1, ECY01 Sour #2, The Yeast Bay Melange Sour, Bourbon Barrel Quad
In bottles: Mango sour, Lambic, Brett tripel, Sour brown, Brett L/B Porter
Kegged: Jamil's Sweet Stout with Raspberries, Dry-hopped sour (De Bom), De Bom on tart cherries