John, your pattern isn't actually very far off of one I use
Not the best pic, but it's also the combination of, or adapting existing patterns. Can't think of any 'new' pattern out there that couldn't be called similar to another. I use to tie mine with a red bead and full hackle all the way through years back (a lot like yours), but I found that the glass bead broke too often and I like the slimmer profile. I call the fly a 'leech' but I'm thinking they take it just as often as a damsel.
Hook size 12 TMC 200R
Tail black marabou
Weight .20 front third
Body Green ice dub
Rib Fine silver wire
Hackle webby grizzley died olive green
Head large red head made from thread.
Had a few variations, but haven't changed this one for 3 or 4 years now. Thinking of replacing the hackle with some marabou spun around to make a collar (cut short to similar length as hackle)
Like your fly...like slim profile and the suggestiveness of many food items.