Here are some pictures of tail types:
Compare yours to these. Hope this is useful!
Since OP is looking for help identifying the tail type of a female betta, which can be really tricky, you may want to consult this thread, which I've found helpful.
Edit #2: also is it just me (or maybe an effect of the photo) but it almost seems as if the tail has two lobes and is imperfectly split in the middle, like a DT?
I'd say a delta or super delta (depending on how far the tail opens in degrees from one edge to the other, 179-130 super, under that to around 100-90 degrees would be delta) with a funky pair of DT genes going on.