It has no name, it's just an annelid worm pattern with partridge hackle, it's caught fish for me before.
body-tie in d-rib, vinyl rib, or whatever, towards the front of the hook. while pulling rearwards on the d-rib, wrap thread to the rear. tie in a couple strands of krystal flash (optional. wrap thread forwards then wrap krystal flash forwards and the d-rib over the flash.
simple but effective!
p.s. this pattern works great in red or orange without the hackle for the worm.