They are just midget fan leaves.
I have been stumbling along with my , is it acoustic, or electric guitar? Either way is not all that compatible building wise with the other. So I decide electric. Shoot, need to build up the sides. that was why the cutting 2x3's in the garage. Of course I used a Stratocaster body to determine the length, later realizing they are shorter in the butt end. So glue a piece on there also, then a few more. Got the last two pieces glued up and sliced my thumb with a razor blade. You know, if it were not for bad luck...
Stubborn as I am I planed down the back and top with a hand plane, even with the thumb. The bandad wasn't sticking so I wrapped it with masking tape. Keeps the water out pretty well in the shower also. I just did a rough level. I'll flatten it out tomorrow and then draw the shape on it. I'll cut it out then smooth the edges, cut the arm and rib bevels. then finish shaping the top. Then flip it over and rout out a ledge for a spruce sheet to sit on as a cover. Then hog out the unneeded bits and make it as hollow as practical. Almost would vbe easier building up lake an acoustic guitar but I want to do a fair amount of beveling the edges and it gets complicated in an acoustic. I'll do it on the next one.